Hey, thank you for all the responses! As it turns out, the oil filters that are most often on sale, and thus the ones I purchase, ulp, are Fram PH8A. And I did have an episode about 2-3 years ago when the oil pressure gauge started going low for a period of about a week. It cleared up mysteriously, and has been normal since. I guess that's my last Fram purchase.

I will follow up on the other possibilities, too. Thanks,

Kurt

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- '79 240D - engine swap complete! Engine broken in! 28-31 mpg! Lovin' the ride!
- '86 190D (W201-126) - 2.5 NA engine, 5 speed, cloth interior, manual climate controls, 33-34 mpg (sold to forum member).