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Re: I am looking at byeing a motor home and it has a 440-3 in it by BUBBA THE BUS TECH
The power spec varies from year to year and depends later in life on maint. etc. A sweet running 440 on a 27 foot class A could make 12 MPG if driven 55 MPH Pushing a 40 foot class A at 70 mph 4.5 MPG would be really good. It all depends. Good Luck