Diesel Truck MPG

transamz9 wrote:

bobx2 wrote:

Me Again wrote:
He asked best!!! I gave the best answer so far. The trucks I identified will get 14-15 towing his trailer maybe even a little higher and 24-25 empty on the highway. Chris

Gonna have to raise the BS flag on these numbers. Take 5 mpg off of them, and then they are realistic.

I can get 12 mpg out of my 05 Cummins towing 18,000 if I take my time and empty out on the road I get 22-23 not trying. If I slowed down to 65 then I know I can bust over 25 empty. The best I have ever seen was a 400 mile weekend trip on very straight 2 lane. I average 27 mpg hand calculated for that trip. That was a once in a blue moon trip though. With cruise set @ 75 I'm in the 22-23 range empty. So put your flag away.;)

Thats is some kind of freak milage, all my buddies with common rail dodges (tuned/built motors or not) see 10-12 with 12k and never see 23 empty unless all that is mostly driving downhill, some of them guys have 500-1000hp motors thru a EFI live/CSP5 and are always trying to find the best mileage towing. even thoe I am a duramax guy I would trade my 650hp @ the wheels for your rig if I could get that mileage, congrats....