I've run both, on the same pickup. My 98 F150 was used like a car for the first 100,000 miles and I put P tires on it. When it was graduated down to a farm pickup I changed to LTs quickly. For pure highway/city use, a P tire is ok, and will indeed get you a little better mileage. But my experience for any off-road or gravel road use, the LT is far better. The sidewalls are much tougher, and resist rock damage that will give you a flat on a P tire. I run the LT tires on a 1/2 ton pickup around 45 lbs for empty use, put a little more in if hauling. I also like the lack of sway on corners with the LT. Steering is more positive, I think. LTs do ride rougher, but not enough to bother me.

For what it's worth, people who live off the blacktop and have to travel on gravel roads a lot wouldn't use P tires on a pickup if you gave them a set. They get tired of fixing flats from rock damage.

Last edited by 300_savage; 10/31/14.