Mace Canute
Elite Member
I use factory filters for most of my vehicles, even after the warranty's over. They usually cost about the same as aftermarket and I know that they actually meet the factory specs. I keep hearing about aftermarket filter that don't quite meet the specs for things like size of particles filtered or pressure relief valve trip point even though they're listed as compatible.......
A friend is the local dealer for Texas Refinery Corp. and a Used Oil Analysis is done on every oil change he does. Occasionally a report comes back that there's dirt in the oil and almost invariably that can be traced back to an aftermarket air filter that does not seal properly. Switch to a factory filter and the next oil change shows clean oil, as far as dirt is concerned.