I used Mann filters (spin-on) exclusively on the E30 because they were cheap and available locally and recommended by my favorite BMW master tech (he had a long explanation about that spring-loaded deal being good for oil pressure on startup and at idle.)
I use Mahle or Mann filters (cartridge type) in the E36, depending upon what the local import parts house has in stock, but I usually special-request Mahle because they have metal caps and a perforated metal support ring around the actual filter element, which makes 'em feel more sturdy than the Mann versions (with plastic caps and no support ring IIRC.)
I have no bias for or against Fram, having used 'em on several Japanese cars for many years with no issues.
Jon
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