4 cylindar gas mileage

Unloaded I’ll get about 300 miles per tank. Upon fuel-up the truck takes about 18 gallons. My mileage used to be better (less horrible), but some few modifications have happened since the time my truck was stock. If I’m just cruising the interstate at 70-75mph I can get about 340miles on a tank.

 

Is anyone else in here running 295s or a true 33? I also have a camper shell, dual battery, sleeping platform, full sized spare, fridge, sliders, front bumper and i am lucky to get 17.5 on the hwy. It's more around 14-16 in town depending on how i drive. Truck is a 09 2.7L 5spd w/ 4.88s for reference. Curious if others with heavy trucks and big tires are also seeing MPGs in the 14-15 range regularly?

 

What size and what kind of tires do u have

 

2007 reg cab 5 speed manual trans 4x4. I seem to get right around 24 mpg with my mix of back roads and highway driving. I routinely go 400 miles before the light comes on.

It does drop a mile or two in the winter - I'm in 4wd a fair amount, warm up the truck sometimes, etc., and I believe they change the gas formula a bit in winter up here in NH.