After reading your post I did a search for filter tests on the web. I was surprised to find out how badly the Fram did in tests. I've used them for 10 years on my Nissan Sentra which still runs perfectly at 186,000miles. I've changed oil, Valvoline 10W30 and the Fram at 3,000 mles since getting the car.

I won't be using Frams anymore based on the results I've found but I think, perhaps, frequent oil and filter changes make more difference than the quality of the product. All I'm basing this assumption on is the mileage I've achieved on my Nissan. It drips a little oil from the pan/timing cover gasket but doesn't burn any. My sister-in-law has the same Nissan we do and doesn't maintain it. At 100,000 miles it's junk.

BTW, I'm using Mann on my Volvo.
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Erwin in Memphis, '95855t, '86 Guzzi LeMans, '76 Montesa 348 Cota