Quote:
Originally Posted by Captain Snooze
It is often the case that better flow comes at the expense of worse filtration. As it is impossible to find test data on filtration for each filter one doesn't know how much, if any, extra solids are being ingested by the engine. I do not know if it is significant; just that there is no free lunch.
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Oil analysis will have excess silica from a crap filter... There has been testing years ago as well (mainly for Supras but the different brands haven't really changed their tech at all)