12v millage

Discussion in 'Trucks and Trailers' started by South Florida Lawns, Jul 22, 2010.

  1. South Florida Lawns

    South Florida Lawns LawnSite Platinum Member
    from usa
    Messages: 4,784

    What kind of millage can I expect from a stock 94 reg cab auto 4x4 3500? Thanks
  2. deerewashed

    deerewashed LawnSite Senior Member
    Messages: 883

    you should probs be looking at like anywhere from 11 up to 18
  3. deerewashed

    deerewashed LawnSite Senior Member
    Messages: 883

    sorry that is really cague but i have heard many different answers
  4. South Florida Lawns

    South Florida Lawns LawnSite Platinum Member
    from usa
    Messages: 4,784

    oh and gears 4.10
  5. Gravel Rat

    Gravel Rat LawnSite Fanatic
    Messages: 9,544

    A dually with 4:10 gears and a heavy truck you will be lucky to get 15 mpg it will probably be 12-15 mpg if it was a 5spd you would get better mpg.
  6. 360ci

    360ci LawnSite Senior Member
    Messages: 998

    I agree, the autos really sapped the power out of the 12V engines. 5 speed all the way.
  7. WH401

    WH401 LawnSite Senior Member
    Messages: 572

    Well in my common rail with 4.10's I get 15 - 16 in 50/50 city/highway driving, and about 17 all highway at about 63 mph, (1900 RPM). The 12 valve is an older mechanical engine, and the older mechanical engines tend to get better mileage than the newer common rails, most of the time. Different gearing I know, but my 92 W250 4x4 Auto w/3/54's will go about 16 - 17 in mixed city/highway and about 20 all highway. These are all unloaded numbers, fyi. If your planning on using the 3500 as your new work truck then it'd be a great way to go.
  8. ZTR_Diesel

    ZTR_Diesel LawnSite Senior Member
    Messages: 371

    I have 3.55's on a 2500 2wd regular cab, 5-spd (about as light as these truck get.) Depending upon use, ambient temperature, and load, I have ranged anywhere from 17 - 24 mpg, hand-calculated, over nine years of ownership.

    Figuring a dually, 4wd, auto that will probably be loaded more than I do, likley 13 - 18 at best, the auto may sap some power but it's not all that bad mileage wise, I had a 2500 4wd auto first with 3.55 rear end and routinley saw 22 mpg on the highway. The 4.10 rear end will sap more mileage than the auto. However - the 47Re automatic isn't the best choice overall; it can be build to take the torque, but until it is, it's not a matter of "if" it will fail, rather "when."
  9. DoetschOutdoor

    DoetschOutdoor LawnSite Bronze Member
    from S. IL
    Messages: 1,818

    You are only getting 17mpg on the hwy at that low of speed? Hell, I cant even imagine driving only 63 on the hwy and my 06' gets right around 20 on the limited trips we've made so far. Got 19mpg on a short 130 mile trip to the lake last night, hand calculated with only putting in about $20 in fuel tank was embarrasingly empty. Also, the other diesels come out alot on Fridays so that was alotta hard driving just f'in around with the powerstrokes that seem to multiply overnight around here
  10. Gravel Rat

    Gravel Rat LawnSite Fanatic
    Messages: 9,544

    My brothers 12 valve 2500 4x4 auto the automatic really eats up the power any time I drive the truck I have to get used to the slow take offs. No point in even mashing your foot to the floor it is too rough on the transmission. I caculated his fuel mileage and at best he is getting is 14 mpg. Pretty poor considering the truck is lighter than my F-450 that sees 11 mpg regulary with the 6.0.

    Any dually truck don't expect fuel mileage your after capacity.

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