IdaD wrote:
carpetguy2 wrote:
I had 07 cc lb lifted with 35s towing a 34 ft tt and a 40 ft 5ver.Never got that crappy mileage.I towed 65-75. I was getting 12 to 15 mpg
I did remove my cat first and helped alot.
Never threw a code.Then I went with 5 inch exhaust and did a egr black plate and did get efi.It made a big difference.
Then my mpg jumped up about 2 mpg and alot lower egts.
Now I have a lmm dually same set up and still get 15 to 17 mpg towing my 40 ft 5ver
Do you only tow downhill when there's a tailwind?
No, he's related to a guy on the cummins forum who gets 27mpg highway with his def deleted 4th gen with the AC off and 18mpg pulling his toyhaulers. Amazing how a few people are able to defy the laws of physics with these trucks. Wish I had one!
But I'm happy with 10-12mog loaded and 18 unloaded.
