Post your fuel mileage revisited....

Discussion in 'General Tow Rig Discussion' started by RJF's Red Cummins, Mar 4, 2008.

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  1. RJF's Red Cummins

    RJF's Red Cummins TRC Staff Moderator

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    Our last mileage thread has become quite dated, going back to pre-ULSD fuel IIRC....

    Just did quick road trip with about 200 round trip miles. I got 19.04mpg with 80% freeway/20% intown. Optimal conditions, 70*, flat ground, and moderate breeze.

    With 155K on the clock and heavy tires, I felt pretty happy.

    Post up your recent mileage numbers!
     
    RJF's Red Cummins, Mar 4, 2008
    #1
  2. Shifty

    Shifty Active Member

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    Just running back and forth to work, 16 mile round trip.

    half town /half 55mp highway

    pulling right around 14mpg. but the fuel filter needs to be changed

    got 190k on the clock

    96 F250 4x4
     
    Shifty, Mar 4, 2008
    #2
  3. 4054x4

    4054x4 Well-Known Member

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    Since I got my truck about a month ago, I have recorded all of my fuel mileage numbers and taken an average:

    Average (3 tanks) mix of city & highway: 17.95 mpg

    Also, I took a small roadtrip this last weekend. I drove from LA to Visalia and back down. I topped off with fuel right before I left and re-topped off right when I got there. With the cruise control set at 65mph the whole way I got 23.31 mpg.

    By the way, all of these numbers are hand calculated... I wouldn't trust the trip computer haha.
     
    4054x4, Mar 4, 2008
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  4. Woods

    Woods Well-Known Member

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    What gears and tire size you running?
     
    Woods, Mar 4, 2008
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  5. h2omelon

    h2omelon Member

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    6mpg in town and 9.5 on the highway:doah:
     
    h2omelon, Mar 4, 2008
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  6. Woods

    Woods Well-Known Member

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    Last time I checked. 19.9mpg @ 70 mph running empty. 10-13mpg towing @ 70mpg, tow a camper so the wind is a big factor. 285 tires with 3.54 gears.
     
    Woods, Mar 4, 2008
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  7. 4054x4

    4054x4 Well-Known Member

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    I believe they are the 3.55 gears and stock (265/75/16) tires.
     
    4054x4, Mar 4, 2008
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  8. Sparky

    Sparky Well-Known Member

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    23.7 driving on cruise at 60mph at last fill up but just got the new programmer and have not kept my foot out of it so that's out the window now, going north this weekend for about 400 mile round trip will post up the new numbers then.
     
    Sparky, Mar 5, 2008
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  9. Hawg Hunter

    Hawg Hunter Active Member

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    Average from 19 to 16, hand calculated, running 24 miles, round trip per day. Mostly open highway at 55 MPH.
     
    Hawg Hunter, Mar 5, 2008
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  10. Rob Knoell

    Rob Knoell Well-Known Member

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    Today I drove down to Albuquerque from Los Alamos to pick up my father. On the way back we drove trrough the Jemez Mountains and then back to Los Alamos. Basicly making a big loop. The trip down to Albuquerque was all highway and Interstate. The way back was Interstate and highway consisting of mountain roads. The whole trip I averaged 21.1 on the cave man math and that is not including the 10% that it is off for the 35" tires. Corrected comes out to 23.21 mpg. I was excited to see this number! This was done with 3.73 gears, 6 speed manual tranny, on a 06, crew cab, dually, 4x4.

    LT.
     
    Rob Knoell, Mar 5, 2008
    #10
  11. ramcat

    ramcat Member

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    lot of short trips lately, getting 13-14mpg
     
    ramcat, Mar 15, 2008
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  12. truckie481

    truckie481 Active Member

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    About 18mpg right now, it will go up to 20mpg come summer.
     
    truckie481, Mar 15, 2008
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  13. joez

    joez Well-Known Member

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    Typical mileage with the 315's and 3.54's is about 16. I have seen 20 all highway keeping it under 70mph with the 315's, and as high as 23 when i was running stock 245's and keeping it under 65mph.
     
    joez, Mar 16, 2008
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  14. WSTEPHENS

    WSTEPHENS Well-Known Member

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    mine has been dropping every time I fill up to less than 16 mpg. Had the dealer do a reflash and will see if it did any good the next time I fill up.
     
    WSTEPHENS, Mar 16, 2008
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  15. strai8up

    strai8up Well-Known Member

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    on the weekly adverage, work and back getting 23.4 hand calc. Towing getting about 16.or so , Don't really check it while towing
     
    strai8up, Mar 23, 2008
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  16. dzlpwrd

    dzlpwrd New Member

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    i live in canton maine
    with the winter blend and plowing a 2.5 mile logging road i was @ 8.1 by truck computer i found this to depressing to challenge i am now back to 9.5 this summer it should go up to 15.6 around town and 20.8 highway 55mph
     
    dzlpwrd, Mar 24, 2008
    #16
  17. luckyhat12

    luckyhat12 Active Member

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    best tank so far was 19.4 before the muffler fell off. I haven't had a decent trip since then.

    Worst tank was 7.4 towing a 18k camper in a head wind. That was rough. All hand calculated...

    I am about to put a programmer on my truck to see if it helps any.
     
    luckyhat12, Apr 1, 2008
    #17
  18. gmcjimmy88

    gmcjimmy88 Well-Known Member

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    I get an avergae of 9-12 MPG's empty and 9-12 loaded. For some reason my truck does not care. Averages comes from hauling about 6-7K behind the truck. It is a 2005 GMC 2500HD gasser w/4:10's Love the truck not the mileage LOL
     
    gmcjimmy88, Apr 11, 2008
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  19. luckyhat12

    luckyhat12 Active Member

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    Well I knocked the muffler off and took a 1200 mile trip. I still didn't get any better mileage. I got a smarty programmer and still didn't get any better mileage. This is on cruise control... not my fat foot.

    I have come to the conclusion that I am gear bound. I can't get anything more than the same mileage regardless of what I do to the truck so far so I am going to start saving for some gears to lower the ratio and engine speed for more mileage. Mine is better than some but not as good as the automatics.

    Just thought I would share.
     
    luckyhat12, Apr 11, 2008
    #19
  20. MrTow

    MrTow Well-Known Member

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    You need a
    1. Dodge
    2. Cummins
     
    MrTow, Apr 14, 2008
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