Sunbeemer wrote: I can'timagine the engine makes less than 11 or 12 psi oil pressure except on a warm day at idle, so when it is producing more pressure than the bypass valve is set to open for (which should be almost always), the oil should largely take the path of least resistance and bypass the filter, and thus it will not get filtered.
Is there some flaw in this logic I've overlooked?
[Gently, cam, gently]
Your logical flaw is in the highlighted word... the rest of your supposition becomes meaningless. Before drawing a conclusion such as yours, it helps to have real data. That said, Fram is pretty well determined by several of those who have done research to be a trash filter.
I have been using the M1-102 Mobil 1 filter for a long time on my Rockster. I don't remember where, but the Mobil 1 filter was highly recommended to me as the best filter I could get regardless of cost. I have tried the Purolator filter a time or two and may change back to that one based on the good reviews here. It is a little cheaper than the Mobil 1 and probably just as good.
Fram filters suck big time. They are the only filter that I have had come apart one me. I'll never use them again.
No matter where you go, there you are.
Boxers Rule! Umm. . . the bikes, not the underwear.
