Hello, after reading some threads on oil filters, some guys are using an PF63 in place of a PF48. Claiming that the extra filter media is the way to go. My biggest thing, is the filter being 0.75" longer worth the hassle if you ever had to go in for a warranty repair? I would gather that if you pulled into the dealer with engine complaints and they saw the wrong filter....... Also, there was a lot of talk about ecore AC filters. Something to do with a plastic cage instead of the steel tube? This resulted in the filter media tearing during use. I will have to check my PF48s when I get home.