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  1. #71

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    Quote Originally Posted by surrealone View Post
    Colder, denser air this time of year, maybe?
    Nope. It's in the 70's today and last week it was in the mid to high 60's.


    2008 Ext. Cab Silverado LT1 5.3L 2WD
    APC LED Tail Lights | Spec D Smoked Third LED Brake Light | aFe Magnum Force Stage 2 CAI

  2. #72

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    Quote Originally Posted by Untouchable View Post
    Nope. It's in the 70's today and last week it was in the mid to high 60's.
    Got me, then.

  3. #73

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    2003 Silverado 1500 5.3 3.73 gear 285/75/16 duratracs mbrp duals 13.78MPG (50/50)
    2003 CHEVY SILVERADO
    3" LEVELING KIT
    285/75/16 DURATAC'S
    MBRP STAINLESS DUAL'S

  4. #74

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    2010 Silverado 4x4, 5.3L 6spd Auto 3.08 gears.
    Stock with 265's = AVG 17.6 to 18.1 MPG
    2" RC level kit and 285's = AVG 14.1 - 16.5 MPG.
    It's normally around 15.5 and I drive with a light foot. I have found anything over 60 mph and the gas mileage drops big time!!!
    Next item is the H/T speedo cali. Oh and these are based on 70% highway

  5. #75

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    2009 Silverado 5.3, Z71, leveled, 285-65-18's. Catback exhaust, decent air filter no intake though. city(small town 45mph):13mpg's stop and go.
    Highway 60-75mph driving like a sensible person not using cruise in the hills and rolling on and off throttle to coast up hills(not lying here):17-21mpg's.
    Your right foot is the biggest mpg factor, no matter how many upgrades and programmers your foot controls it all!
    2009 Silvia~Superlift 6"~DropStars~Nitto Trail Graps~FSOR Catback~Madtunes Racing~4.10 gears~cleared headlights~hi-6

    NNBS SILVERADO BUILD

  6. #76

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    99 silverado 5.3 with 33s (18/21) city highway with a bully dog programmer
    5.3L VORTEC
    EXT CAB PEWTER
    33X11.50X16 MICKEY THOMPSON TTC CLAW
    AR MAINLINE RIMS
    STRAIGHT PIPE
    LEVELED OUT
    7 FOOT FIRE STICK BLUE
    COBRA CB
    2 12S AND A 3500 WATT AMP
    6000K HID IN FOG AND HEADLIGHT WITH SMOKED LENSES


  7. #77

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    2010 Silverado 5.3 w/3.73 16/18
    2010 Chevy Silverado Z71 ext cab.4x4
    72 Monte Carlo 350-415 hp- sold (June 2011) to pay medical bills
    79 Impala 350 4bbl 375 hp- sold (June 2011)to pay medical bills
    oldfart2413@gmail.com

    "If He asks you to go a mile go two"

  8. #78
    Legend

    Join Date
    Jun 2006
    Location
    River Ridge Louisiana-4 miles W of New Orleans-didn't flood-water stopped 800 yards away.
    Posts
    1,613

    Default

    1998 Suburban 1500 2wd 219,500 miles
    12-13 mpg pure city short trips
    21 mpg hy on long pure hy trips-3000 mile roundtrips-averaging 60 mph- CC set to 59-67mph-obey speed limits- road work, cities, towns lower averare speed to 60 mph.
    Great mpg for such a huge comfortable vehicle
    1998 suburban-
    1/2 ton

    199500 miles
    River
    Ridge,LA

  9. #79

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    09 Sierra 4x4 5.3, leveled with 275/55/20 wheels and a flowmaster SI/DO exhaust. I get 14.5-15.1 City (depends how heavy my foot is). I drove nearly exclusively in stop and go small town conditions. I'm not sure what highway mileage is since I never take trips over 15 miles. Not too horrible for such a bulky aggressive vehicle.
    09 Sierra SLT
    - Denali grille, black HALO headlights, smoked tails & brake light, 20% tint, Carbon fiber interior
    - Top Gun Customz 2.5" leveling kit, 305/55/20 Toyo Open Country AT's on GMC 20's
    - K&N 77 series cold air intake, Flowmaster super 10 series exhaust
    Next up: Smoked fog lights


    2000 Silverado Z71
    - 4" body lift, 315/65/16 Mastercraft Courser AT2 tires
    - Stainless steel Excalibur catback exhaust
    - Lots more to come!

  10. #80

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    2006 Chevy Silverado Vortex Max 6.0 (LQ9 engine). Performance tune for 89 octane, cat-back exaust, and CAI. 14.2 Stop and go (less than 5 miles per trip, LOTS of stop and go), 15.1 City Driving (80/20 split) 18.2 Highway (20/80 split) with 65-75 Speed limits.
    2006 Vortec Max 1500
    Performance:
    -Custom Tune (389HP 440 Ft/lbs Trq - Dyno'd) | Volant CAI | Magnaflow Dual-in/out Exhaust w/3" stainless pipe tips | Fully Built Transmission w/ Red Eagle Clutches & Kolene Steels w/ Corvette Servos and Stage2 Shift Kit | 35K Tranny Cooler | Mobil 1 | Royal Purple Rear Diff
    Other:
    -Spray-in Bed Liner
    -Premium Sound w/lifetime Satellite Radio | Leather | Sunroof | Heated Seats
    -Limbstriping from USING the truck (those are badges of honor)

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