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  1. #1

    Default MPG with Active Fuel Management

    Hello Everyone,

    For those of you equipped with Active Fuel Management, I'd like to know what highway MPG you all are getting. Earlier this year I purchased an 08 Silverado WT, 4.3L v6 for commuting purposes. I thought getting the 4.3L v6 would give me the best MPG (as far as full sized trucks are concerned). I'm beginning to wonder if I should have put out more money to get a bigger engine with the Active Fuel Management especially since most of the driving I do is freeway driving. Look forward to hearing from you all!


  2. #2
    Sr. Engineer zach45's Avatar
    Join Date
    Apr 2008
    staten island new york


    i have 1500 lt1 4xw with z71
    i get 10-11 city and something like 18-20 highway i think..

    and i have a heavy foot.. no bed cover or antyhing yet

  3. #3


    I have an '08 1500 with the 5.3 V8 and I averaged 16.5 the first tank and 17.1 the second tank. This a combination of city and a little highway. No interstates at 65 mph. Just 55 mph highways.

  4. #4


    Regularly see 20's on the highway in both the heavy '07 avalanche (wife's) and my heavier '08 suburban

  5. #5


    I have an 08 with the 4.3 and with 5000 miles on it I am getting close to 21 mpg combo driving.
    2008 Silverado_ Gone
    2006 HHR LT
    2008 Cobalt LT
    2001 Sonoma Gone
    2009 Cobalt XFE

  6. #6


    Everyone, If you have AFM, post what your MPG is.

    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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  7. #7


    I have 08 tx edition with the 5.3L, 1st tank got 15 but a lot of city, showing everyone my truck
    2nd tank got right at 20 with more hwy, the dealership told me after the 1st 1000 miles the truck should be getting around 22-23 on hwy if I drive it right.

    08' Silverado Ext. Cab
    Texas Edition
    Flowmaster 40 series duals
    Windows tinted 5% all around
    Remote start
    Garmin nuvi 260 GPS
    K & N Air Flow
    Sirius Stilletto 2 Radio

  8. #8


    I'm getting 15 in the city, and 18-20 on the highway, but that is highway with mountain passes, so your mileage may vary.


    '08 Chevy Silverado LT2 Extended Cab - AVS Hood Deflector, BedRug Mat.
    '06 Chevy Equinox LS - Stock! (Wife's car)

  9. #9


    That's pretty good. Everyone wants to get better MPG these days. I'd expect to see more Active Fuel Management options on more models in the future ... as well as hybrid options.

  10. #10


    wow, with all the money that im spending in gas every month it would almost even out if i bought a brand new truck with this AFM system on it lol i get like 13 city 18 highway, thats if im easy going

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