I did a search on low rolling resistance tires and found this site. I read the discussion and most of the info was 3 years old. My questions are, what brands would be best for a 1986 Mazda B2000? Would a passenger car tire give better millage then a light truck?
Chevy 3/4 and 1-ton trucks
I don't know for sure, but I'd guess that a P-metric would be better than a LT series -- unless you go into the high load range tires that allow you to use more pressure, and then of course only if you do use more pressure.