Originally Posted by Johnny2Bad
This one's easy.
"Do Performance Air Filters Actually Work?"
Yes. They pass air and trap contaminants.
The question not asked:
Do they work better than OEM filters?
Maybe. Maybe not. The question is irrelevant, as the OEM filter passes more air than the engine uses, even when contaminated with the expected amount of debris at less than the expected filter life, and a slightly dirty filter will trap more particles than a clean one. So don't replace them before the maintenance hours or mileage has transpired.
^^^^^^^^
Very, very good post here...
Air filters can go way way longer in a number of circumstances. My lady's Camry air filter really looked quite good even after 34k miles... I should have checked it before buying a new one. I was shocked at how good it looked after 2 yrs and 34k miles.
Now funny thing is my Nissan Altima VQ air filters look way worse than hers did... After half has many miles. Strange in a way. . But even my air filter could still go 20-22k miles... While hers probably can go 40-44k miles.. I'm leaving her Purolator air filter in for 2
and a half years for this run.