I've noticed my mpg really jump up with warmer temps (I know about the blend switching of gasoline from winter to summer).

Even on my trip to Moab/Vegas/Malibu last year...when I went to the west coast via the mojave desert (rte I15) my gas mileage shot up to 23mpg on the highway. I was barely getting 17mpg before that in the "colder" climates of other states. My trip to Vermont with temps in the '90s yielded 23mpg there & 22mpg back.

This winter the mpg in my VX after 2" lift & 32" MT tires has been pretty low although I hadn't computed it I can only say I went from 350+ miles per tank of all around type driving down to around 265 miles per tank.

With Spring now trying to kick in and warmer temps plus change in gas blend...I'm now finally seeing some improvement..looks like I could top 300 miles this tank!


My VX is the first vehicle I've ever owned that seems to like hotter weather as far as gas mileage. My theory..the driveline fluids & engine oil thinning out & the tire temps going up!