MPG improved with heavier tires???
Our F150 came with the stock P rated, SR-A Wranglers. I didn't think they were as bad as most people claim, but if I needed new tires, why not try to eek out some improvement? So I debated going w...
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However, after 3-4 weeks, what I'm getting is about a 1-2 mpg increase on my work commute and a 4mpg increase on highway driving. A recent trip from Greenville to Gatlinburg (through the mountains on I40) I returned with a 23.5 mpg average on the truck computer (which is confirmed accurate).
There could be lots of things that account for the mileage increase. The bottom line is this. Those tires did not increase your mileage this much.
If it were that easy to increase mileage on a truck by 4 MPG or even .5 MPG the manufactures would pay $1000 bucks a piece for those tires.
My guess is your tire diameter messed up your mileage calculations.
