Oil filter

jbc426 said

All other oil filters bypass an awful lot of oil while the motor is running. That means a significant amount of your engine oil is effectively not filtered, and that's no bueno.

http://jomarperformance.com/wordpress/?page_id=2

Click to expand...

Interesting article.... but it does not appear to be reality relative to how things actually operate. The test pump flow was 8.5 gpm into presumably a wide open return, and not into any sort of engine system where the flow gets restricted. The chance of any SBM accepting 8.5 gpm of flow is about 0.0000001% LOL. IIRC, the SBM HV pumps flow maybe 5 gpm at higher RPM's and in reality, the engine itself restricts the flow to a lower flow number. So the pressure drops reported in this article simply aren't applicable to how things really operate with these engines.

Based on all that, the idea that filter with bypasses are bypassing a lot of oil all the time is just not reality. I have not looked into the filter media size of these Jomar filters to see what they are relative to typical media size; that is another effect on actual filtering.

And as for using smaller filters, yes, one would expect more drop, but most street uses are not pushing the filter capacity anyway.