Accidently posted this in the UOA Forum sorry about that. I just added an AMSOIL BMK-13 By-Pass filter system to my 2003 Mercury Marauder. I'm running Amsoil S2000 0W30. I read a couple of threads that the S2000 0W30 had pretty good numbers with the by-pass system. I have the same filters the guy with the Subaru had (SDF-15, BE-90.) I saw another that had awsome numbers with this setup also. I've also read people bashing the fact that "the by-pass is masking the true performance of the oil." Pardon me, but who cares? Look at the UOA's with this oil and the by-pass filter system. http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=000576 Nuff said. Does anyone have info on what the typical wear nubers are on these engines? I'm using an AMSOIL SDF-15 full flow filter. Anyone know what the flow numbers are on this filter compared to the FL-820S that is the stock filter for these engines? msparks, TooSlick, Pablo? Thanks.