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  1. #121

    Smile Fuel Mileage

    Last Summer In Ideal Conditions I Got 22 Mpg In My 1990 Suburban With An Overdrive 700r4 And Averaged Around 60mph On Highway And Now That The Cold Weather Is Here I'm Getting About 15-17mpg On The Highway And About 12mpg Around Town Now And Was About 17-18 In The Summer Around Town. This Is Only A 2 Wheel Drive Burb As Well. So I Can't Really Complain At All. Actually I Was Very Pleasantly Surprised Last Nsummer.

  2. #122


    Anyone working hard at increasing their MPG?

    10 Chevy Traverse LT AWD
    02 Chevy Trailblazer LS (110K+ miles - loaded except for 4WD - WRECKED!)
    99 Chevy Cavalier LS (105K+ miles - commuter car)
    78 Chevy Suburban Silverado (454, 3/4 ton)
    62 GMC 3/4 ton Pickup (350 police interceptor)

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  3. #123


    I am working on it to save by being light footed on the throttle. Still getting 18 MPG combined driving.
    2008 Silverado_ Gone
    2006 HHR LT
    2008 Cobalt LT
    2001 Sonoma Gone
    2009 Cobalt XFE

  4. #124


    I get about 28 on the highway and 24 in the city, Its all stock

    2005 Canyon 28000 2.5
    Lincolnton NC

  5. #125
    finalday7's Avatar
    Join Date
    Oct 2007
    Sayward, B.C Canada


    Steve Anyone working hard at increasing their MPG?
    I'm doing the little things. Programmer ( helped a ton) new muffler and next will be the intake.

    2007 GMC Sierra CrewCab 4.8L
    Tinted Windows, 20" Chrome MB Predators on 275/55/20 Copper AT's, GM Bed Rug, Speed Scene Chrome Grille, Putco Chrome Handles, Hypertech Max Energy Programmer, Magnaflow Muffler and many more mods to come.
    Former GM Vehicles:
    96 Chevy Camaro. My first car modded for a High School kid.

  6. #126


    I'm getting an average (highway/city) of about 15.5 - 16 with my 07 Classic Crew 4x4 with the 4.8, I leave my bedcover on most of the time too, I dont know exactly how much it helps.
    I run Amsoil in my truck's engine, and want to get the tranny and diff done with it too.

    I am thinking of a muffler and a programmer sometime in the future... but right now, my wallet is a little too thin from just putting fuel in it..
    Wichita Falls, TX
    2007 Chevy Silverado 1500 Classic LS 4x4, 4.8L
    Thrush Welded muffler, dual exhaust
    HELO MAXX6 18" Rims, Torza Tri Fold tonneau cover :glasses:

  7. #127

    Default It's an LS2 . . . .

    2007 TrailBlazer SS - I drive 60-80 miles per day, all city, and average about 13.9. But heck, it DOES have a Corvette LS2 in it, so it's no big surprise. And the FUN FACTOR definitely makes it worth it!

  8. #128


    I've had my 5.3L w/Active FM 08 Silverado Crew Cab for about a month now, and the first two tanks were horrible about 11.8 with a steady mix of city/hwy, and was really worried but I guess it was just engine break in because I'm over 1000 miles now and the third tank got 16.2 city/hwy. So if that keeps up I'll be happy. Been driving it with a feather foot most of the time.

  9. #129
    Jr. Apprentice bkovacs's Avatar
    Join Date
    May 2008
    Cleveland Ohio


    I get about 12 MPG with my suburban with the 7.4L, about 13-14 in the truck with the 6.0L
    '99 K2500 Suburban Vortec 7400
    '00 k2500 Silverado Vortec 6000 ex. cab

    '84 K5 Blazer 4x4 lifted (defunct)
    '86 Dodge w250 4x4 lifted (also defunct)

  10. #130

    Join Date
    Jun 2006
    River Ridge Louisiana-4 miles W of New Orleans-didn't flood-water stopped 800 yards away.


    I just drove from New Orleans to Flagstaff AZ -1508 miles-in my 1998 2wd Suburban 201,000 mile 1500..I drove with the CC set on 68-70 mph with 43 psi in the fairly worn tires.I use Mobil 1 5W30, it used about 12 ounces of oil.
    I got 20.8 mpg-much better than I expected.I'll post the return trip in a few days.I doubt that the good mpg was because of favorable winds-usually the return trip gets me 1-1.5 mpg better(done the trip many times, 1st time in the Suburban).
    My city mpg is nothing special-I work hard to get 14 mpg-gliding a lot.

    Obviously I'm pretty pleased with the mpg.We drive straight thru-sleeping in the vehicle at rest stops-so very big is very good.We have a futon mattress in the back for us-and the dog-to sleep on.TX has great rest stops with lots of activity/trucks/lights and the dog will bark,so it isn't too dangerous to sleep there.A motel would be nicer, but $80 is $80.The back of the Suburban is free.
    1998 suburban-
    1/2 ton

    199500 miles

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