8.1 Oil Pressure and Filter

marquette wrote:
At one time I did a lot of reading about oil and filers on the Bob The Oil Guy forum. After reading about Fram filters (that I has been using) I switched to the NAPA Gold filter. It didn't raise my oil pressure as much as it did hold my oil pressure at it's high range. Meaning when I come to a stop or slow down the oil pressure doesn't drop the way it did with the Fram filter. From what I understood it has something to do with better back flow valves in better filters. The NAPA Gold is not unique to that it's just readily available for me. I also learned that it is important to match your oil to your engine. Push rod engines need different oil that roller cam engines. For example my old 4.0 Jeep push rod engine needs more zinc for wear than synthetic oil provides but a 4.7 Jeep will do better with synthetic because of the cam design. Much like this forum there is a lot to learn over on the oil forum if interested.

I think what you meant with push rod engines is actually flat tappet (lifters) vs the roller lifters. The new oils have the zinc and phosphates removed for better emissions and you either need to use additives or special oil that is meant for flat tappet engines (such as my 454 in my 73 Chev). You can have push rods with flat tappets or roller cams.