What oil filter should I use on my 06 wrx tr? It's getting to be that time for the first oil change but I'm not sure if I should go with a factory oil filter or aftermarket. I did some searching and it seems like a couple years ago the factory filters were supplied by purolator and people were saying just to buy purolator rather than the factory filter since they were the same. Is that still the case today? Just wondering if I should pick up a filter from the dealer when I go pick up my car cover. Thanks