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  1. #11
    Jr. Apprentice workman482's Avatar
    Join Date
    Mar 2013
    Location
    L.A. (Lower Alabama)
    Posts
    15

    Default

    2003 2500HD 4x4 extended cab I get 11.6mpg.
    That was on the tires that were on the truck and before sea foam and oil change.
    Tires were 305/70R16 cooper discover stt with little tread left. Just put on a set of 285/75R16 BFG all terrain ko's. Also ran some sea foam through the intake with a fuel injector cleaner in the tank and going to give it a good oil change. I'm hoping to see 13mpg, but I'm not holding my breath. Lol.
    "A good plan violently executed now is better than a perfect plan executed next week."
    George S. Patton

  2. #12

    Default

    about 12 MPG manly Highway 08 1500, 2WD-V6
    Tim Walters (Curky)

    Wrangler AT/S 265/70R17 - Trail-FX window vents - Husky fitted splash guards - Silver Star zXe - Leveling kit -

  3. #13

    Default

    2011 C/C 5.3 AFM with 6spd auto 1500
    average 19mpg
    city 15
    Highway 23

    Added Magnaflow muffler and duals from muffler back (2 1/4" pipes) about 2000 miles back.
    Before that my average was 20
    city 16
    Highway 25

  4. #14
    Sr. Apprentice
    Join Date
    Mar 2010
    Location
    Wichita Falls, Texas
    Posts
    33

    Default

    My Silverado with the 5.3 gets 14 around town and 19 on the highway.

  5. #15
    Sr. Apprentice
    Join Date
    Mar 2013
    Location
    Currently living in Medford, Oregon. Was raised in Athens, Georgia
    Posts
    69

    Default

    I'm getting between 14-17 MPG...that's with no mods
    2008 6.2L GMC Sierra Denail

  6. #16
    Sr. Apprentice
    Join Date
    May 2013
    Location
    Calgary AB
    Posts
    37

    Default

    My last fill was 24.56 mpg imp, stock 01 silverado 4.8. 108000 kms.
    2001 Silverado LS LT LT 4.8 rwd. Last fillup 24.56 mpg imp in city only.

  7. #17

    Default

    Keep it going.

    Steve
    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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  8. #18

    Default

    Tanked up today and made a even 27 mpg. Sure wish it would stay that way throught the NW Indiana winter! All my bolt on mods and driving techniques have paid off. The truck is a Sierra Classic 4.3L, 5 speed manual.
    Last edited by Goldie; 11-08-2013 at 04:41 PM. Reason: added info

  9. #19
    Sr. Apprentice
    Join Date
    May 2013
    Location
    Calgary AB
    Posts
    37

    Default

    That's real good mpg, im sure everybody in the mpg gain thread would give up there left wheel nuts to hear how you did it.

  10. #20

    Default

    Parkrat - O.K., it's done.

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