Car Type : 99' Chevrolet 3/4ton C2500
Miles on Car : 126k
Gallons : 24
Miles : 306
MPG : 12.75 mpg (towing my 240 @ 65mph blasting the 40 degree a/c) ~ 3,900lbs total


Since I bought it so far I've only changed the air filter.

Hoping to see at least 14mpg after a full tune-up and running some Seafoam through it.

All things considered I think this is pretty good.

Tank holds 34 gallons so I'm going to run it a bit lower next time before filling up. Scangauge was only 0.6 gallons off out of the box on my "gallons used"