I drove the truck like i stole it for an entire tank. All takeoffs were very heavy, if not full throttle. Most stops were fast. About 60% of the driving was stop and go around town, the rest was 80-85mph highway. I dont think i drove it a full mile without at least one full throttle run.

I did this for both fun and as a test. I wanted to see worst case numbers, so from here its only going to get better.

The end result was just a hair over 18.5mpg. Really not too bad at all considering how hard i drove it. I am willing to bet if i drive nice i will get at least 20mpg around town. Maybe better on the highway if i keep it at 65 max.

 

This is with the old 3 speed non-lockup tranny. Max speed right now is 85mph at about 2900rpms.

 

Man if I drove my Hemi Ram like that, I would get about 9 mpg, I usually drive tame but I do get aggresive and jump on it from time to time, that gets me about 12 mpg. I'm totally jealous!!
Jim

 

I really wonder how many mpg i would get with a newer Cummins with a 6 speed. My uncle gets 23 around town and some hwy with his 02' 4x4 cummins. But he drives like Ms. Daisy. LOL