Originally Posted by steam
If you buy the K&N filters I have some great Swiss Naval Bonds for sale..amazing intrest 120% per quarter.
Almost everyone I know who works on cars, Jeeps and any thing that runs on gasoline tells me the K&N filter DO NOT save gas or improve mileage. As previously noted in this thread; if it did the engineers at Chrylsler would be selling them and all the chips in the catalogs. IMHO
For the record an oil trap air filter (K&N) works very well on dusty roads and trails so long as you stop every 5 miles and clean it.
From personal experience with a dozens different vehicles, 2 and 4 wheel street and off road racing, most have gotten slightly better gas mileage with K&N filters but not all.
And for the record, K&Ns work fine for everyday driving and not bad off road if the conditions are not too dusty, but from someone that has done some serious off roading, both 2 and 4 wheeled, you should be using an oiled foam filter system and in very dusty conditions you should use an oiled pre-filter skin over the oiled foam filter, like the GNCC cross country racers use.