your oil filter preference

[Fyeganeh]

Originally Posted by thstone

With the above being said ^^^, I understand that my experience is not representative of all engines.

However, in reality, doesn't the oil that goes thru the bypass get filtered the next time thru? Even if the bypass was permanent, isn't the turnover rate high enough such that it wouldn't take long for all of the oil (and all of the contaminants) to have passed thru the filter?

What I mean is first pass, 20% unfiltered. 2nd pass 20% of the first 20% is bypassed (0.04%). By the third pass, 20% x 20% x 20%, only 0.008% of the oil is unfiltered. Very quickly, the amount of unfiltered oil approaches zero and any new contaminants are also quickly filtered out in only a handful of turnovers.

Or am I missing something?

You mean 20% then 4% and then 0.8% and so on. Same idea.