How much miles per gallon does a 15.0 liter diesel engine use for a heavy duty 18 wheeler truck?

How much miles per gallon does a 15 liter diesel engine use for a big 18 wheeler truck? Also the engine is a caterpillar.

Tags: 15.0, Diesel, Duty, Engine, Gallon, Heavy, Liter, miles, much, truck, wheeler

3 Responses to “How much miles per gallon does a 15.0 liter diesel engine use for a heavy duty 18 wheeler truck?”

1. kenneth t says:

   October 17, 2011 at 9:57 am

   between 5 & 8 MPG
2. mrblob197 says:

   October 17, 2011 at 10:34 am

   Well . . . it’s not actually possible to answer that here.

   Depends on how old the truck and engine is, is it an older pre ECU engine that’s a bit worn and done 1/2 a million or more miles, or is it a brand new EURO4 computerized engine?

   Is the truck bobtail? Empty trailer? Fully loaded b-double?
   What type of driving? Around town/local, or long distance?
   Hilly country in the ranges or flat plains driving? or both?
   18sp RoadRanger or 5 sp Allison auto?

   The only way to get an accurate measurement is to drive on the intended route with the intended load then fill-her-up, and work it out.

   BUT as a ball park, you could expect anywhere from 4 MPG up to 12+ MPG, but I know that’s not really a helpful answer.
3. Cummins makes the boost.dmax sux says:

   October 17, 2011 at 10:43 am

   there is no way it could ever be double digit mpg. yes there are so many things that could mean more or less mileage like computer programmer like a pittsburgh power box or upgraded ECM. loaded and unloaded is the biggest one. 4-8mpg