Originally Posted by greenie
Interesting point, but totally false. Federal law -the Magnuson - Moss Warranty Act and the Clean Air Act - both state that the manufacturer may not require the use of any brand filter (or any other article) unless the manufacturer provides them free of charge under the terms of the terms of the warranty.
So using aftermarket filters will not void your warranty!
I guess things (and consumer laws) have changed alot since I worked in the car business along time ago.
I still figure the factory engineers know what's best for the car they designed, built, and tested, so I'm staying with the Manufacturers parts.
Aftermarket parts are guaranteed by their manufacture. So if they cause any major problems with your $35,000 car, I guess you'll get your $4.95 you paid for it back from them.