I have noticed that a lot of people like to complain that the PF48 is too puny for my many V8 engine. They then tell you how they "need" a larger filter and then put the wrong oil filter on. Is a filter that is 1" to 1.5" longer REALLY worth it. Apparently people are saying that the PF63 is a long replacement for a PF48. Nowhere in the manual does it state that it's OK to use the wrong filter. I can just imagine if you have engine problems and the dealer sees the wrong filter on the car. Wonder what will happen then?