Forum Discussion

CP194849's avatar
CP194849
Explorer
Jun 16, 2013

Fuel mileage of Diesel engines

I'm in the process of shopping for a used diesel pusher. Would appreciate input on the following: All things being equal GCVW, etc, is there a substantial difference in fuel mileage between a larger engine I. E. 400 to 500 HP and a 300 or 330 HP engine
Class A
  • Yaj's avatar
    Yaj
    Explorer
    Jun 16, 2013
    I have the little 230hp 5.9 Cummins. If I take it easy I can get 11mpg. I'm pretty happy with that.
  • wolfe10's avatar
    wolfe10
    Explorer
    Jun 16, 2013
    For a given weight and driving style, there is little MPG penalty on a diesel with more HP. Larger diesel, lighter throttle for same power. Remember, diesels can run on a lot of air and little fuel if not pushed.

    But, most with that extra HP USE IT.
  • rexabbot's avatar
    rexabbot
    Explorer
    Jun 16, 2013
    crasster wrote:
    Just keep in mind the diesel costs more, if that is your concern. It evens out.


    OP was only asking about diesel
  • crasster's avatar
    crasster
    Explorer II
    Jun 16, 2013
    Just keep in mind the diesel costs more, if that is your concern. It evens out.
  • rexabbot's avatar
    rexabbot
    Explorer
    Jun 16, 2013
    I don't think so.
    My 300 hp Cummins with turbo boost to 400 hp gets 7-8 mpg.

About Motorhome Group

38,705 PostsLatest Activity: Jan 26, 2025