75 Speed Limit - How Fast
We are heading to Utah from NC. I-40 most of the trip with speed limits at 75mph along much of the way. I do NOT go that speed when pulling. What do you guys do? ETA: Carlisle HD Radials rated t...
Forum Discussion
Walaby wrote:
I wish my diesel got decent mileage at 72. Been there and tried that and didn't work out too well. My best mileage is 63-65
Mike
Get a tuner, Emission compliant, better power, better mileage, all it does is reprogram the ECU & TCU, trucks all stock other wise. Factory sets everything the same for all vehicles, while the tuner lets you pick from a few "programs", normally econo/tow/horse power. I use tow and it is supposed to add 50hp in the reprogram. Some also "shift on the fly" were you can change while driving, mine does not.
