We did this in High School shop class back in 84. Fram was the worst. Purolater just above Fram, ACDelco and Motocraft next and WIX being the best. I believe WIX is the current maker of the NAPA gold oil filters.Originally posted by MasterYota:
<STRONG>I WISH I could find the artile I read once. It was by a mechanical engineer who got bored and just bought one of every brand and cut them apart.
He rated the FRAM last in about every category. ACDelco and Motorcraft scored high, as did most all of the other 'Factory' brands - especially the Japanese ones.</STRONG>
WHOA here. I didn't do all that much, just offer some personal opinions. I do reference the Oil Filter Study, which I recommend you visit and read with an open mind.Here's a link to Pappy's website. he's done a ton of work here. Hope he can chime in with more info. Oil Filter Study