Just want to offer one suggestion based on some discussions here. You may want to use an oem oil filter. On *some* aftermarket oil filters, the bypass valve (the one that can open and send unfiltered crud into the engine/banjo filters/etc) may open at a much lower psi than an oem unit.
It's totally your choice, but I think this bypass valve pressure rating is a pretty big deal, and using a filter that opens it prematurely could explain why there would be any crud in any banjo filters at all (in theory there shouldn't be).
Last edited by heiche; 03-11-2013 at 09:37 AM..