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Is ok 4.5-5 mpg for cummins isx?

Discussion in 'Questions From New Drivers' started by Neghinam1, Nov 2, 2014.

Page 2 of 2
  1. Nov 2, 2014 #11
    Jimmbuds

    Jimmbuds Medium Load Member

    398
    179
    Apr 20, 2009
    Daytona Beach, FL
    0
    A little slow
     
    Jimmbuds, Nov 2, 2014
    Jimmbuds, Nov 2, 2014
    #11
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  3. Nov 2, 2014 #12
    Neghinam1

    Neghinam1 Bobtail Member

    19
    2
    Nov 2, 2014
    0



    Hi and thanx everybody for quick response

    Yes I am new driver, and new in this forum....
    I got this truck from Arrow.....one month ago....and always I drive east-west....i'am pulling a reffer. ....30-35 lbs. ....I never did nothink mechanical reapirs, truck is still under warranty. ...I have 90 days from Arrow, and also I have 3 years warranty for 5k.....is 10 speed.....I drive 63-65 mph.....On the hills is little lazy. ...I was with 28 lbs load.....and on hils 40 mph.....

    If someone know what is the problem, and where, or how I can fix this it....I will be very grateful.
     
    Neghinam1, Nov 2, 2014
    Neghinam1, Nov 2, 2014
    #12
  4. Nov 3, 2014 #13
    x#1

    x#1 Road Train Member

    1,773
    1,104
    Dec 24, 2009
    Cherokee County, Alabama
    0
    IF that is all your truck will run,it is castrated and should be turned up to factory specs.your mileage will go up. I had a freightliner dealer in pa. set a truck up that i drove and they only charged a half hour labor.my fuel mileage went up instantly and so did the smile factor of driving it.
     
    x#1, Nov 3, 2014
    x#1, Nov 3, 2014
    #13
  5. Nov 5, 2014 #14
    WitchingHour

    WitchingHour Road Train Member

    3,424
    2,143
    Apr 1, 2011
    Broomfield, CO
    0
    Kinda wondering how that truck is set up. It seems a lot of office jockeys are automatically assuming "less RPMs = better MPG", without taking into account things like the engine getting bogged down, power band, etc. I mean, I'm seeing new trucks with 13 liter engines and .74 OD transmissions turning 3.36, 3.25, 3.08 rears... color me skeptical about that working out for the better.
     
    WitchingHour, Nov 5, 2014
    WitchingHour, Nov 5, 2014
    #14
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