If you're concerned about sludge buildup in various parts of the engine, find a Franz bypass filter. These use a toilet paper roll for a filter element. I can speak from experience that they keep the oil looking clean. And the elements are nearly free. I found one on flea bay a couple of years ago.
People say that grit/carbon in the oil smaller than the oil clearance in the bearings can do no damage. I disagree. One method of cutting metal is with high pressure fluid containing grit. The same sort of fluid under pressure (30 PSI and up, except for 216s) with carbon in it going through bearings will eventually cause wear simply by its being forced through the parts.
Cleaner oil is better. That said, nearly all full-flow filters allow particles of less than about 25 microns to stay in the oil. There was a time when bypass filters were much finer. No more. What specs I can find indicate they use the same filter medium as full-flow filters.
This discussion does not address the ill effects of acids in the oil which is a considerable part of wear. The acids get in there from the oil but mostly from fuel. Diesel is regulated to very, very low sulpher content but gasoline is not. Higher quality gasoline MIGHT contain less sulpher but you'd probably have to buy airplane gas to get it. Change your oil.
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