What's your MPG?

[bigwil2500]

a "GOOD" 9MPG out of my 1997 chevy 2500 7.4L

[HidChevy99]

just filled up and got about 15 mpg in my 99 silverado with the 5.3L... not to bad

[Fletch128]

I just drove 2400 miles in 10 days from Orlando, FL up to Dayton, OH. Back down from Dayton to Lexington, KY. A few little stops here and there.. never let the gauge get below 1/4 a tank but with setting the cruise control on 78 for most of the trip I was averaging right at 18-19 mpg. When I got up into the mountains I set it back down to 70 and I was still averaging 18-19 mpg. For my last tank, Macon, GA.. south. I set it on 75 and got right at 21 mpg... All of this is still a helluva lot better than my old Ford 4.6.

[Silver08JT]

I went home this weekend (180 miles round trip) and got 20.8 mpg. That's not very many miles but the mpg was still slowly climbing when I got back into town. Two lane roads all the way. Stayed between 55 - 60 mph all the way in the rain.

I'm installing a Volant CAI this weekend and we'll see if it improves and how much.

[mspa]

I have about 3500 miles on my new 09 Silverado 1500 LT crew cab Z71 with 5.3l V8 (flexfuel). I drove about 3200 on a cross country trip across the western half of the country and up through mountains in Calif/Oregon. Haven't changed the factory oil yet, but my average mpg was between 18.2-18.6 mpg, and I was stomping on the pedal every once-in-awhile, just for fun :)

One of these days, I'll take a trip with the intention of besting that. But I assume that after the first oil change and the newness of mashing the pedal for kicks wearing off, will help my regular mpg go up.

That's also using 87 octane fuel. And a combination of highway, city and winding roads.

[2wheelmudder]

I have a 95 chevy c1500 i get about 17 doing 50/50 driving

[stubby]

Hi,
I'm finally back again, sorry but i have been experimenting with these fuel cells, as far as the joe's cell never could get it to work well, so i went to the smack booster and am getting 41 mpg with a ford 4.6 liter hghwy or city consistently, so if your interested in it get on the internet and google the word smackbooster and they have posted the plans for it forfree, it will cost about $50-$60,per unit, some will have to buy or build an efie board for the 02 sensor to fool the computer, they work real good on a diesels ,just install the feed line on the suction side of the turbo.

[countryboy82]

own a 2003 silverado with a 5.3 4x4 z71 i get 17 city and 21 hwy All stock truck all i do is keep it tuned up and tire pressure up !

[5point3]

before

city- 14.1
highway-17.5 cruise control set at 73mph

after volant intake and gibson exhaust

city-15.2
highway-20.5 cruise control set at 73mph

[lbuajlw]

I have a 2002 GMC Sierra 1500 4x4 4.8L reg cab long bed. When I keep my foot out of it, I can get around 18mpg. Usually it is more like 14 - 16 due to hauling or driving like a jerk. I have a few tweaks that improved the mileage but also made it fun to drive, sore of a catch 22 situation. (K&N air intake and flowmaster cat back exhaust)

[route66paul]

About 11 mpg 91 Sub 454 and all the bells and whistles

[ohmybowtie]

My Z71 w/ built carbed 454 get about 13 mpg's highway 10 mpg city.

[Mattdtrue]

My Tahoe gets around 12 mpg my tires hurt me I'm sure.Bought the K&N cold air intake thinking it might help...Not makes it get worst 5.3 sucks gas bad in mine

[Swatchvy]

Last tank i did said 16.9. I'm packing a stock 5.3 with 26k.

[eyegore]

11.5 mpg while towing and around 15 around town if I drive conservativly. 19 highway but that's only going the speed limit and that's hard to do. '07, 6.0 VortexMax w/3.73 gears.

[iPublicEnemy47]

TBH im not entirely sure but Im pretty sure I get 15 or so ... Im gonna fill up in like 4 days then all get you a true answer

[mpoczobut]

16 in the city and 20 on the highway with my 6 Speed Transmission. I expect to get even better gas mileage after my first oil change.

[08victoryredZ71]

After 7500 miles i get about 17mpg

[zachb91]

alright i got to add my trucks lets see.my 2004 gets about 9 in the city thats having fun driving and about 20 on the highway. now my 1975 c30 gets about 8 all round

[2ToNe04]

19-20 mpg


good driving habit = more mpg

[mspa]

Are you guys with NBS using your "Average" mpg on the DIC/instrument panel, or calculating manually?

Just curious. Over my 3200 mile trip (after buying) my DIC said I was averaging between 18.2-18.5 mpg. Now after too much mashing the pedal, I'm down to about 17.8 mpg.

[tigersdl65]

Well on the inteerstate my 96 chevy truck gets 15-20mpg, depending on how many idiots are driving to slow in the fast lane! City mileage is around 12. I just got my first expireince with an 18-wheeler puttiing me in the median, talk about exciting!

[2ToNe04]

Are you guys with NBS using your "Average" mpg on the DIC/instrument panel, or calculating manually?

Just curious. Over my 3200 mile trip (after buying) my DIC said I was averaging between 18.2-18.5 mpg. Now after too much mashing the pedal, I'm down to about 17.8 mpg.

nah i dont use that no one really uses it, i heard its not really accurate.

[brev]

i've got a 06 sierra hybrid 4x4. highway and city combi.i get 21 mpg.some of the time i had the a/c on,not bad for a 5.3 extd. cab

[hmaster77]

my 08 chevy silverado gets about 18-19 even on long trips but im a little hard on the gas and its only got the 4.3 v6

[bigburb]

Haha gas mileage? What the heck is that? But in all seriousness, I probably get about... 9. I got an old chevy on 33's, a heavy foot, and alot of stop-n-go traffic. But hey, I didn't buy it for the gas mileage, otherwise I would have bought a prius! Well, maybe not... But you get my point :lol:

[iPublicEnemy47]

I get about 15 - 17 or so.

[ACracing]

I get about 14, but it depends on how I drive.

[ki4kma]

I WISH MY TRUCK GOT BETTER MPG!!!!!

TRY SWALLOWING 7-9 MPH DEPENDING ON HOW YOU DRIVE:lol:

[zubbiez]

I WISH MY TRUCK GOT BETTER MPG!!!!!

TRY SWALLOWING 7-9 MPH DEPENDING ON HOW YOU DRIVE:lol:pretty much the reason I dont drive that old body style even though its my favorite :money:

[BAMES]

I had to get rid of my Trailblazer the cost of keeping it running was getting to much. I did go out and buy a new Tundra and I'm getting 20 to 21 mpg with it very happy with the new truck.

You are aware this is the GM Truck Club?:neutral:

My 1999 Sierra 5.3 gets a solid 18 MPG, if i can stay off the throttle. Before E10 I got 19.

[iPublicEnemy47]

15.9 is what I got my last tank

[Scoutmaster]

I have an 06 Silverado. Purchased 1 mo. ago with 11,000 original miles! I track manually as well as computer resets. I calculate about 1-3MPG less than computer calculates. IF I assume that the ODOMETER is correct. I KNOW the gas station pump is correct. This will lead to an EXACT mpg. Why then the delta between my calculaton and the onboard calculation? Is the quantity of gas used as calculated by the onboad computer derived from an actual fuel flow transmitter or is it calculated from the fuel tank level float. (which are traditionally estimates at best.)

Scoutmaster.

ps. MPG runs about 17 over the road, 15 in town. NOT BAD for an old truck.

[Swatchvy]

06 is old?

[countryboy82]

The caculated MPG on my truck is aout 2-4 MPG less then i actually get and the kms to empty is never right either. Now that my truck i dont know aout the rest of them !

[VectraGT]

09 Silverado 4X4 5.3 FLEX = 20MPG Highway with avg speed of 110KPH or 65MPH, 15MPG city driving. Also removed the governer to better handel the autobahn... when im running 110 - 120 MPH is goes down into the single digits.

[tigersdl65]

I dont know how anyone get 20 mpg! It is impossible for me to do, even if I had a 5.3 it would be worse, of course running bigger tires doesnt help either. At least we got rid of the 1996 chevy 2500 with a 454SS. You want to talk about awful mpg.

[VectraGT]

If you run anything bigger than stock you are going to reduce your mileage. Adding a lift or even a leveling kit to the truck will also reduce gas mileage. Looks or economy? you be the judge!

[budfreak]

my truck with 191K miles on the clock gets between 20-22 MPG average.:great:

[bvogts25]

07 NBS 1500 Silverado gets around 16-17 mpg while driving in the suburbs. haven't really got a good highway reading

[zachh1020]

I have a 2003 Chevrolet Silverado 4.8L V8. I get about 14-15MPG on a good day if I don't really get on it.

[buddy85burb]

ya...... i get about 7 mpg in my burb

[jtl5008]

I've been getting approximately 19.8 mpg's in my 2005 Silverado Extended Cab 5.3L. My drive consists of about 40 miles highway and 20 miles dirt road. This is when I drive the posted speed limits and about 15-20 MPH on dirt roads.

If I have a frustrating day at work I tend to drive quite a bit faster and get on average 14.5 mpg's. :glasses:

[VectraGT]

New all-time low for my '09 5.3L... coming back from the Mosul River I had the cruise locked on 95MPG going up and down hills. Final average for the trip was 9.5 MPG! But it sure was fun... Not to mention the accidental offroading adventure that ensured upon trying to find a "shortcut"...

[singleshot54]

was wondering what rear end ratio you guys has when you're getting 15+MPG in. My 2003 HD Silverado 4x4 6.0 L has a 410 rear end and I get 14 C or HW but when I tow I drop to less then 10

[dsfloyd]

I average 12 mpg with my 04 2500 crew cab 4x4 6.0L. Mostly highway but enough city to lower it. didnt really lose any after lifting and new gears.

[Tydeone]

Currently getting 16.5 mpg in my '93 Silverado 5.7L with mixed driving.

[woodbw]

06 Silverado 2500HD 4x4 Duramax. 23-28 Highway, 16-19 city, about 15 with box camper and pulling trailer.

[08bowtie]

Well I just picked up an 08 2500 HD this past week and on the highway driving it home 300 miles I averaged 15, then I hooked up to the work trailer (14' V nose construction) and averaged 9. Not too bad for a BIG BOY truck :):lol::gasp::sign0011:

[09sliverado]

09 silverado 5.3 6spd auto towing a 5x10 trailer and a 800lbs ATV today i got 14.1 mpg according to the dash

[wpnsgy]

Well I just picked up an 08 2500 HD this past week and on the highway driving it home 300 miles I averaged 15, then I hooked up to the work trailer (14' V nose construction) and averaged 9. Not too bad for a BIG BOY truck :):lol::gasp::sign0011:


Semper Fi right back at you Good luck with the new truck

[corvairfan]

My 04 Silverado, Z71 4x4 extended cab, 5.3engine auto, with 40k, has been averaging 16- 16.5 this summer. I get to drive into Philly everyday(what fun), and some local. I stay at 65 highway, honest, because I am cheap, or keep the tach just below 2K. Only the occasional blast to get out of the way. Is this truck capable of 17 or so with some other tricks?

[tsbrewers]

My basically stock 2k silverado gets about 11-12. That is driving it like a grandpa too.

Brew

[Al Stefanelli]

Dunno.. The speedo cable was broken when I bought the truck and I still ain't fixed it. :rofl:

[gnxbigdog]

My 08 chevy crew cab 5.3. After market aircleaner and exhaust. My mileage is only 16-17 at 2k rpms.

[tommyboy]

98 silverado gets between 15 and 17 depending on how I drive. 2001 ford exploder gets the same. Lets hope the gas prices stay down a little longer till I trade the ford in on a puddle jumper.

[77chevy]

I get 2 miles per gallon! Pretty Chitty, I say! 77 350 3/4T 350 auto

[bac-n-afect]

As of Tonight I was getting around 14.2 mpg city and about 19mpg highway

[laffman]

2004 Chevy Suburban gets 14 mpg.

[KRAZYKARL]

I get 16.5 around town. I set my cruse on 70 the other day and got 22.3 mpg. A few months back we were going between 80-95mph for a bout an hour and a half and I got 18mpg
Crew cab z71 4x4 5.3 flex fuel 3.42 rear. The only down side is I pulled a 5x8 trailer with my Polaris on it to the lease a month ago and got 13 mpg going 80mph. I have checked the computer with my own calculations and it is almost right on the money every time, hard to get exact due to the fact you might top it off a little more than the time before

[08bowtie]

:sign0173: you know my computer is DEAD NUTS :lol::lol:when it comes to computing vs hand calculating, I know a lot of people have mentioned that their computer is off but mine was right on.....today avg 15 on the hwy at 73 :rofl: not too bad for a BIG BOY truck :lol::lol::lol:

[truckertruck]

You guys need to just slow it down some on the highway. If you drive the speedlimit, not ten over, then your fuel economy will improve remarkably.

25.5 mpg's on a 400 mile round trip this past weekend. 60-65 mph.

[Swatchvy]

With the new flowmaster exhaust, i got 20.7 mpg my last tank, fill up in a couple days will tell me if that was a fluke.

[wayned]

I get little under 19 cary about 1000 pounds of tools. 5.3, 373 gears. not to many hills in fl.regcab nnbs07

[5speedsilverado]

i actually pulled 18mpg for all in-town driving this time i fueled up

You guys need to just slow it down some on the highway. If you drive the speedlimit, not ten over, then your fuel economy will improve remarkably.

25.5 mpg's on a 400 mile round trip this past weekend. 60-65 mph.
yes, but you make up that mpg in time it takes to arrive

[RllyDrvr9]

Just pulled 17.3 avg mpg using 87 and in-town stuff.

[rwynant]

:sign0173: you know my computer is DEAD NUTS :lol::lol:when it comes to computing vs hand calculating, I know a lot of people have mentioned that their computer is off but mine was right on.....today avg 15 on the hwy at 73 :rofl: not too bad for a BIG BOY truck :lol::lol::lol:


Well speaking of big boy trucks ;-)) I just picked up a 2500HD 8.1L with an Alli Tranny....runs great BUT and I do mean BUT the first bit of fuel mileage was in the 11 mpg range.

Combo in town and freeway driving.....this was after installing a new K&N drop in air filter...still need to do the plugs.....oil is good, but need to find out exactly what it is.

But here's my question: where do I find what rear gears I have in this used truck?

Thanks
Randy

[fx2offroad]

I got a 08 Reg. CAb silverado with the 4.3L. I average 15.8 to 17 in the city, depeneds on how good i drive and how much i use the A/C. On the highway I can get 16 when i'm loaded down for camping or 19.5 just going about 75 to 80 with no load.

[5speedsilverado]

I got a 08 Reg. CAb silverado with the 4.3L. I average 15.8 to 17 in the city, depeneds on how good i drive and how much i use the A/C. On the highway I can get 16 when i'm loaded down for camping or 19.5 just going about 75 to 80 with no load.
wow that sounds really good for a v6, my friends v6 sierra gots 16 on highway, and 10 in town with no mods

[neverenough]

09 burb gets 17 daily/ 19+ on the highway
02 2500 gets 12 daily if I keep my foot out of it!

[fx2offroad]

yeah it's not bad. I wish I had the 5.3 and a 4x4 but that would really suck the gas. got to wait till i get out of college for that one. The V6 does really good here in the city.

[Big B]

Just bought my 2004 1500 Burb, second tank read 15.9 mix of both city and hwy.
This is totally stock, I will help her breath better and repost.

[x3no]

My 05 Sierra 4x4 Stock gets around 16-17mpg mixed city/highway.
My 03 Grand AM gets 27ish summertime and around 24ish winter.. mixed city/highway.

Both are basically stock. Grand AM has a K&N Air filter. Might help a little.

[vms4evr]

06 Silverado, 57K miles, Z71, 4x4, 5.3L, 3.42 gears. 1st tankful gone through was 16.4mpg combined. I cleaned out the fuel system, installed a K&N. Changed oil over to synthetic. Changed diff fluid. Will be having wheels balanced. They need it. We'll see if my mileage improves any.

[dbach]

12 mpg. I hoped for better but my mileage seems to agree with what i read online.

[RatRod]

My 2001 Sonoma 4.3 gets 16mpg in the city and 24mpg highway.

[wpnsgy]

Mileage on the 09 Silverado 5.3 4x4 extended cab has now improved to about 16.5 mixed driving. about what I would expect and much better than the 12 when I first purchased it. It now has just under 6 K

[Tydeone]

I just got an '04 Silverado 4X4 Ext. Cab, 5.3L V8, in early August. I got a steady 16.3 mpg on the first three fill-ups.
I installed a K&N OEM replacement air filter and am up to 16.8 mpg on the last fill-up.

My '93 Silverado 2wd Ext. Cab, 5.7L V8, was getting 17.5 mpg when I got rid of it.

This is all mixed driving.

[SOUTHERN_FREEDOM1861]

2006 kia sorento 4x4 27.3 mpg on interstate last time i drove it.1998 Surburban 21 to 23 mpg on interstate.1987 SS Monte Carlo T-TOP 21 mpg could get better but it way to fun not to lay posi marks and outrun the jap cars.:great:

[fab_101]

my 94 chevy gets 10 mpg on highway miles. and my honda gets 26.6

[acracerx81]

My 2500hd with the 6.0 gets about 14.5 if I drive it rite. completely stock.

[ChevyLover]

My MPG has dropped over the past two years, I think it's time to get some RPX or other fuel system cleaner to get rid of the carbon buildup. Maybe have to clean out the throttle body too.

[gatormike69]

Got 1375 miles on the new 09, drove from the beach to Oklahoma City, average 14.5 mpg. driving back to the beach next week and hopefully get at least 14.5 on the way back.

[Tydeone]

I just got an '04 Silverado 4X4 Ext. Cab, 5.3L V8, in early August. I got a steady 16.3 mpg on the first three fill-ups.
I installed a K&N OEM replacement air filter and am up to 16.8 mpg on the last fill-up.

My '93 Silverado 2wd Ext. Cab, 5.7L V8, was getting 17.5 mpg when I got rid of it.

This is all mixed driving.

Now up to 17.4 mpg. Best tank full has been 17.8. Curious what I could do with a full CAI and a perf. exhaust. :happy:

[drkbluZ71]

11-12 in the city and 16-18 on the highway depending on how bad the wind is blowing.

[2000liftdsuburban]

I've been getting horrible gas mileage...

its lifted 6 inches w/ 35's
has exhaust, and a cold air intake... what could be my problems... its got a fresh tune up.good air filter. it just seems like it's dropped more than usual i put 25.00 in it two days ago, 20 in it last night drove about 15-20 miles, and now i need more gas to get to work.... ne suggestions i should do?

[snider30]

Tydeone,

I also just got an 04 with the 5.3L 4x4 and am getting about the same as you stock. I have heard programmers can do a lot for mpg's and was wondering what everyone else thought, if I Should go for the CAI first or the programmer? which will help me the most?

[gatormike69]

Got 1375 miles on the new 09, drove from the beach to Oklahoma City, average 14.5 mpg. driving back to the beach next week and hopefully get at least 14.5 on the way back.


14.9 average back to the beach , hopefully it will keep getting better..almost 5000 miles on the truck now.

[06SCSilverado]

6" lift with 35" tires and 20" rims

12.4mpg average


check out www.pcmforless.com....had it done on my 2002 trailblazer gained 6mpg and 10-15hp

[TheTransportGuy2]

I keep pretty accurate records on my 2 Burbs. The 454 gets 8-12mpg depending on the load and the 350 gets 9-15 depending on the load. Both are ALWAYS attached to 1500 pound (empty)trailers, so the load starts there and gets heavier as it goes. Any suggestion for more MPG that are proven would be nice. Thanks. Darrell

[CHEVYVANMAN]

my awd expressfully loaded with tools mind you gets about 15 mpg, but does it in style lol

[bruteshot74]

I get about 450km from my s10, whatever that is in miles.

[MTPockets]

16mpg to 18mpg from my Chevy Silverado, CC, 6.0L

[1stGenSpin10]

My 4.3 gets 22 hwy and 16 city

[XS ive]

2008 CC with 5.3, 4speed, 6" lift and 18x35's is cranking out almost 14 around town.
Hey, it's a lifted truck.:great:

[al96chev]

13-14 around town

[h0serdude]

13.7 average according to DIC. Haven't calculated it at the pump to see how accurate that is.

[SilverCrewCab]

I average 17-17.5 mpg mostly no real highway but I live in a simi-rual area. On a 800 mile trip on I-95 running with traffic, 80+ at times, my 4.8 gave about 16.3/16.7. Not too bad for a 4X4 crewcab with 5 people, luggage and a large well stocked (heavy) cooler.

[woodchuckcanuck]

Well I got a shock today when I made my first fill up after buying this truck. I got a 2001 Silverado 2500HD, 8.1 L with 5 speed auto Allison trans, 3.73 rear. I only did a short test run of 200 km (120 miles). About a couple trips in varying lengths of travel, some 10km (6 miles), some 80km (48 miles).

The truck burned 48.327 L which is 12.76 US gallons (or 10.63 Imp gallons). That's 24 L (9.73 US gallon, 11.69 Imp gallon) per 100 km (60 miles).

That's 12 miles per US gallon. I'm going to shove a bottle of Seaform down its throat, clean out the MAF and replace the filter. We'll see then what happens.

[1S1K]

I'm getting 15-17 on a 08 5.3

[csurane24]

I'm averaging 18 right now with the 5.3

[Jimmeh]

I got anywhere from 16-18, depending on how I drive. Lately just under 16 because the trucks warming up for about 10 minutes or so in the morning.

[blansho]

13.6 on highway damn it!

[starsilverado]

average 14.8 according to dic

[agerangere5]

i average 14.6. i have a 2009 ls with the 4.8 only has 1400 miles on it. im sure it will change with time as i drive it and the comp learns my driving style.

[TritonBoulder47]

I get about 13-17 around town, but that all depends on how many Fire/EMS calls I get... LoL On the highway I get 22+

[blakk0nine]

So far I've been averaging around 15 according to the computer. I've only got about 900 or so miles on yet so that might improve a bit as it breaks in a little more ( i hope ).
2009 silverado 5.3L Z71
Ext. Cab

[Ethan]

I typically get 19-20 MPG with my 1994 350 Silverado when I keep it under 70 MPH. Get about 16-17 MPG in the city when I drive it nice.

[silverado0596]

I have a 05 silverado regular cab 4x4 short bed and i am rated at 18 mpg highway.I actually get over 18 on the highway(wich is funny). but now that it is getting colder i am getting worse mpg. Hopefully when i get some more money i will get a cold air intake and a dual exhaust to help with the Mpg. But around town in the stop and go traffic hell i would be better off walking to save gas.

[Project Reaper]

im around 15 mpg or so, i think the most i got im my 97 k1500 on 35's is 17 mpg.

[s5belford]

14 city, 19 highway with the 5.3

No idea what I get pulling a trailer, haven't pulled anything but the grills for my work but looking fwd to pull a snowmobile trailer this winter!

[b-radical]

im getting about 14mpg in my 2000 silverado. it has 265/70R16 tires and a bad cat, possibly bad o2 sensors also.

[93 Burboun]

we drove our 1993 chevy suburban from florida to illinois and got between 19 and 20 mpg

[77gmc]

in my 77 gmc 4x4 stepside with a 350 and turbo 350 im getting 6 in town and i dont ever drive it on the high way so i dont know what that is lol

[Beer Belly]

'06 Silverado EC, 5.3L....getting 14.8 in mixed driving...12 towing a 3,500lbs Pop Up...53,000 miles on the clock as of today

[DAREDEVIL]

we drove our 1993 chevy suburban from florida to illinois and got between 19 and 20 mpg


absoluteley no way !!!


My Suburban gets ~ 12 towing and max 16 ,,,thats it .

[lsutoms]

My 06 silverado 4.3 got about 6-8
my 09 silverado 5.3 gets 12
08 youkon gets 12
07 suburban 12

all highway and city mix

[DAREDEVIL]

My 06 silverado 4.3 got about 6-8
my 09 silverado 5.3 gets 12
08 youkon gets 12
07 suburban 12

all highway and city mix



I THINK U DRIVE TO AGRESIVE .......:lol:

[bluemarlin]

Driving home from Texas last week I averaged 19 mpg in my 2007 3500 Dually.

[DAREDEVIL]

Driving home from Texas last week I averaged 19 mpg in my 2007 3500 Dually.


Diesel or Gas ??

[lsutoms]

I THINK U DRIVE TO AGRESIVE .......:lol:



lol well the 09 is the only one i drive... the burb n youkon are my parents... and honestly to get 6 on my 06 all you had to do was drive 75 on the interstate and that would take care of it ha

[Gryphon]

1999 'Burb, 5.7 (120k miles), 2wd with K&N filter and the trailer package (lower-geared rear axle): 17 mpg at 75-80 on the open highway, 14-16 on LA freeways depending on how much of a hurry I am in. I can get 23-ish on the open highway if keep off the loud pedal and hold around 65. Best run was right about 26 at 65 mph on a 90 degrees Arizona day, drafting a semi on I-10.

Wife gets 15 on the highway...she likes to drive a bit...less elegantly.

2002 Saturn SC2 coupe: right about 38 mpg highway. Wife's car...I don't fit very well... put the car on rather than get into it.

[cmurphy84]

1999 Silverado 1500 5.3L 4x4 200,000 miles - 13 - 14 MPG - Mix of city/highway
2003 Envoy XL 5.3L 4x4 92,000 miles - 17 - 19 MPG - Mix of city/highway
2003 Honda CB900 .919L 26,000 miels - 45 MPG regardless of how crazy or tame.

We took the Envoy to Georgia last year and with a luggage rack on top, luggage rack in the hitch, and 7 people in it, we still got about 16 MPG highway. Not shabby.

[95Chevyk1500]

95 k1500 5.7 used to get 12mpg, then i replaced the coolant temp sensor (truck was running rich) now im geussin i get about 15 (cant afford to fill it up so i cant tell for sure haha)

[DAREDEVIL]

95 k1500 5.7 used to get 12mpg, then i replaced the coolant temp sensor (truck was running rich) now im geussin i get about 15 (cant afford to fill it up so i cant tell for sure haha)

So by replacing the coolant temp sensor u fixed it ?????????

Tell us more.

[cowboyjarman]

my mileage is bad. i mght get 10 on the highway and around town its between 6-8 . its better than my 78 scout witch gets arond 8 mpg on the highway.

[redneckarmyMP]

my mileage is bad. i mght get 10 on the highway and around town its between 6-8 . its better than my 78 scout witch gets arond 8 mpg on the highway.

of course its bad..youre driving a tank!but definatly worth the bad mileage in my opinion :great:

[route66paul]

we drove our 1993 chevy suburban from florida to illinois and got between 19 and 20 mpg

Is that using Imperial gallons? Could your wife have been adding fuel while you slept? Is this running downhill with a tailwind and being towed the rest of the time? Is the body on the frame? Are you towing a trailer that has a motor that pushes you along? I have owned many full size chevy and gmc trucks and suvs, and it doesn't matter if you are running empty, with or without the AC, what ever, that doesn't happen at highway speeds. If you had skinny tires, overfilled with air, running on a 60F day, downhill at 45-50 mph, without seats, mirrors, rear doors and all the weight you could go without legally, you might get close, but then only if you were using imperial gallons(1 extra quart per gallon), or an alternative fuel source.

[93 Burboun]

Is that using Imperial gallons? Could your wife have been adding fuel while you slept? Is this running downhill with a tailwind and being towed the rest of the time? Is the body on the frame? Are you towing a trailer that has a motor that pushes you along? I have owned many full size chevy and gmc trucks and suvs, and it doesn't matter if you are running empty, with or without the AC, what ever, that doesn't happen at highway speeds. If you had skinny tires, overfilled with air, running on a 60F day, downhill at 45-50 mph, without seats, mirrors, rear doors and all the weight you could go without legally, you might get close, but then only if you were using imperial gallons(1 extra quart per gallon), or an alternative fuel source.


No I was awake the whole time. Only let it get down to half a tank. Number of miles we went since we filled up in florida divided by how many gallons I put in the tank equals MPG. Simple math. Stock 350 besides the true duals with 40 series flowmasters and no cats, with 186000 miles on it. new tires. fresh tune-up. doing the speed limit. Not sure what imperial gallons are. Just normal gallons. 20.2 MPG the first time and 19.7 the second time.

[Project Reaper]

i want your motor then lol i get 16 - 17 on my best days right after a full tune up on a completely stock motor, man i need tiny wheels and tires lol... ya im jelous...

[93 Burboun]

i want your motor then lol i get 16 - 17 on my best days right after a full tune up on a completely stock motor, man i need tiny wheels and tires lol... ya im jelous...

Yeah I didn't believe it myself when I calculated it, I rechecked it a couple of times and was like hell yeah. That was all interstate driving. I need to see what it gets around town.

[DAREDEVIL]

No I was awake the whole time. Only let it get down to half a tank. Number of miles we went since we filled up in florida divided by how many gallons I put in the tank equals MPG. Simple math. Stock 350 besides the true duals with 40 series flowmasters and no cats, with 186000 miles on it. new tires. fresh tune-up. doing the speed limit. Not sure what imperial gallons are. Just normal gallons. 20.2 MPG the first time and 19.7 the second time.


Got to be the MSD coil !! LOL

[cowboyjarman]

of course its bad..youre driving a tank!but definatly worth the bad mileage in my opinion :great:

miliage is the last thing on my mind with that thing. its just fun to drive espially when i pull up next to a Toyota Prius. hahahaha.

[95Chevyk1500]

So by replacing the coolant temp sensor u fixed it ?????????

Tell us more.
Truck was running very rich, it thought it was 20 degrees outside. so it was like it was running on choke. replaced the sensor, problem solved

[Viper]

I've been averaging 17 MPG with the 3 tanks i've been using

[R Runner]

I recently purchased a 1994 K2500 with a 454 and have been getting about 10.2 to 10.9 MPG. The truck has 96,000 miles

[the760rider]

I just purchased a 2003 Z71 Suburban and drove it halfway across the country and back in a little over a week. I averaged 15 mpg throught 5 tanks of gas.

[TurboChris]

I just picked up a 98 Suburban 2500, original owner and 64,000 original miles..last two tanks I averaged 8mpg....city and highway combined.....ready for a tune up?

[93 Burboun]

I just picked up a 98 Suburban 2500, original owner and 64,000 original miles..last two tanks I averaged 8mpg....city and highway combined.....ready for a tune up?


Yeah, It wouldn't hurt to go ahead and do a tune-up on it. What engine do you have in that thing? The 350 or 454?

[blakk0nine]

I notice my mpg has taken quite a hit in this cold weather. Where I was averaging around 15 now am down to around 14.3 or so. I guess a lot more time idling is taking it's toll. Guess you pay the price in mpg for that remote starter.

[Murdered-Knight]

My 08 Silverado on 37'' tires get 12.6 MPG 50/50 highway and roads.
Its horrible on gas, but hey, its a bad ass truck :lol:

[alwcurlz]

Yeah, winter mpg ratings are out the window.

[johnnyr]

The Ethanol in the winter hits the gas mileage 10-15% or more, but what can you do?

[mvoss2576]

The Ethanol in the winter hits the gas mileage 10-15% or more, but what can you do?

Yeah, I found that out the hard way. Drove from Texas to TN to see my family during the holidays. A drive that I can usually get about 18mpg average, I was lucky to get 13. I've talked to some other friends and their mileage dropped too, even in fuel efficient cars.

[4wd52]

My 04 Tahoe gets 12.7 in town and 16.6 on the highway. I avoid using any ethanol gas as the mileage really drops off. Use Shell 87 regular 100 per cent of the time. My 93 Burb TBI is about 12 in town and 15.5 on the highway. These are road trips of 200 miles or less. :happy:

[Thomas Bennett]

My 2001 2wd Crew cab long bed gets 12 MPG pulling 8000 lbs or not at 70 MPH. 14 MPG at 60 MPH.
3:73 gears Allison tranny.

[JoshNila]

Well i usually get 10mpg in my 04' 2500HD and sometimes 9 when i head up the mountain for snowboarding

[onelove]

2005 Duramax 2500

We average 17-19 mpg & I thought that was horrible. We installed a new air intake that was supposed to help us get better fuel mileage.

We just bought a new "runner" & it's getting 45 mpg. Its a 2004 Volkswagon Passat wagon TDI (diesel). I love my truck but for running everywhere I love the change. We are giving her a rest in the garage lol.

[turo]

I take my 08' Sierra Crew to Sealy, Tx from San Antonio once a week. 5.3l the best I got on the hwy is 19.19 (70mph day 65nite). Most of the time it hovers around 17mpg hwy 13-15mpg cty. I wonder if I can get over 20mpg if I do some mod. work???:fighting0072:hmmmmmmm???

[Big75]

1996 1 ton crew cab w/350 - 9 city, 16 highway
1975 1/2 ton with all sorts of bad gas mileage addons - 6 highway, city is probably gallons per mile

[TYMBOM]

I'm way too scared to figure it out, lol.

[Gmcsuvguy]

I only have 5300 KM on myy 09 Sierra Denali and I'm getting 17.3 mpg on it in -15 Centigrate weather. Totally suprised!!!:party: 6.2L and AWD


Just tore up to the city & back (170km) and got 19.8mpg on the hwy!!! wth?? Loving it!!!

[chuffer]

From Montreal to New york in the highway
i was averaging 12.5 mpg

[4.8chevysilverado07]

I get 19 on average with my 4.8 silverado 07

[NWI_#73]

So far on my 08 silverado 5.3 i'm averaging 13.7 :(

[poncho08]

about 15.5 mpg give or take

[4.8chevysilverado07]

So I was hauling ass everywhere and got 14.2 :(:(:(

[ajarman]

I have '08 Z71 and I am averaging 17.2 all back roads.

[NWI_#73]

I have '08 Z71 and I am averaging 17.2 all back roads.

What are your driving habits like? Just wondering? I wish I could get that.

[Relentless]

I have a 2007 Silverado 5.3 Flex Fuel, I get 15.3 AVG...mostly drive highway too...wish it were better

[woodbw]

Well the three year update,
total 50500km 7874.5 Ltrs fuel used.
Average mpg 18.1 Best 27.7 lowest 9.2 "winter around town"
400km trip yesterday 110 kmh "68 MPH" = 19.8 MPG not bad with three people and 400lbs of weight in the box.

[Bern1982]

just checked and my 03 2500 6.0 silverado got just over 10mpg i'm going to have to look into getting better mpg then that

[99ChevyZ71]

im getting around 13 city and 17 highway with my 99

[lalo56]

avg 17mpg.

[rangemanone]

I have a 1997 2500 6.5 Turbo diesel I get 14.5 mpg no matter if its loaded or unloaded. And I put 3000# of gravel in the bed and it barely squats.

[BiG Chris]

2000 Silverado 1500 Z71 all stock with just a cold air intake, 18mpg

[devilsalmostfree]

checked mine yesterday, 19.6 mpg!

[AJ 98 vortec]

My 98 s10 is gettin 28 on the highway and 25 in the city. give ot take 1 or 2 on the city if i get on it... but it gets good gas even though it is a 4.3 vortec motor wit a 5speed

[jeffz0rz]

am i looking at any MPG gains with my headers, CAI , and my diablo predator when it comes in next week ?

[RAM_Z]

Im getting about 11 mpg....: (

[singleshot54]

I bought my '03 Silverado 2500HD new and added K&N air and a cat back system from Magaflow. those took be from 11 mpg to just under 13 highway. This past weekend I added E3 plugs and Summit 8.5 mm plug wires. I gassed up today and noticed I got an increase of about 1.5 mpg on the first fill up. I'm going ot keep track for a couple of weeks and see if it get better. The plugs I was running with OEM wires was the Bosch platinum.

[offroadaddict]

I was getting around 12, with 285/75-16s and some slightly smaller than the stock 265/75s. Recently, probably about a month ago it dropped like a rock, gettin like 80 miles less on a tank, about 11mpg, and slightly under. It may have something to do with the BFG A/Ts, those things are heavy, but I also have other issues like I listed below.

I did the intake manifold gasket right after it dropped off because it was leaking pretty bad. It has the K&N filter i cleaned/oiled a few months back, i need to check it.

Either way it dropped like a stone and its boggled me and the guys i work with.. Long term FT is the only thing thats screwy. its correct at -2 to -5% at idle but instead of hovering there while I'm driving its up at +15 to 19%. Hopefully ints not a fuel pump. These are good trucks, I guess I got unlucky and got a damn lemon.


I'll probably end up putting a magnaflow cat back system on the truck, something a little louder than stock but nothing as dronwing as flowmaster.

[NWI_#73]

Lately i've been getting 15.5 mpg in the city. Still don't have a solid highway mpg average yet since I haven't taken any long trips.

I found out that the trick to getting better city mileage is accelerating quicker on starts to get up to speed then coasting off of the gas and hit the cruise to hold your speed. Before I was baby'ing it to get up to speed and I think that was severly hurting mpg's. It was about 13 doing that method.

[1500ExtChevy]

I just bought a 2005 Silverado 1500 Ext. Cab (4WD) and I'm getting 14.8 mpg even highway, but with that being said I'm gonna end up doing a K&N air intake and switch from compressed air to Nitrogen for my tires and a few other things but slow upgrades for the time being since just bought.

[offroadaddict]

my last tank is back up to 12.5..

I did an injector clean that sucks the cleaner straight into the fuel rail, cleaned the throttle body and switched over to premium gas.. That tank included a ~70 mile trip through the hill country though, constantly going up hills.. and multiple occasions of tearing ass to make sure the pinging was gone with the higher octane gas. This tank should be a better reflection of what all that actually did.

[poncho08]

about 15.5 on my 5.3 amd my dad gets about 21 with his d-max

[blakk0nine]

I found the exact same thing. I was surprised because you hear alot about accelerating slowly being the way to maximize mpg. But I think it's because you're hitting the better power band of the engine where it's making better horsepower and torque when you're on it and then momentum takes over. Because regardless of romping on it or not the computer says 4 5 or 6 mpg from take off and I think the quicker you get up to speed and can back off, the less time you spend at 4, 5. or 6 and can start cruising at 15 to 17mpg.

[jtdchevy]

Well at 86500 miles im getting about 18.3 thats on my every two week run from N.J to T.N not the greatest but far from the worst