I know there is a general claim or belief that K&N filtres will give you more HP and better mileage, but I like data. I'm not as concerned about HP, but can anyone validate that I'll actually get better mileage on my '92 Pathfinder? How much? I like my pathfinder, but with as much gas as it uses, it wouldn't take much to justify installing a K&N instead of stock if it actually helps.
Aaron '92 Pathfinder '88 MR2 NA '70 Beetle project