Actually, I've been using the regular Fram filters since day one, and just switched over to using their "ToughGuard" filters in the last year. But since I change my oil once a month, I figured they were good enough. But a co-worker actually showed me an independent report that tested oil filters from different companies and Fram was rated one of the "worst" ones on the market, and their "ToughGuard" filters only a little better than average. I believe they list "STP" as one of the better ones, if I remember correctly.Originally Posted by rhema83
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