I have a 2005 Mazda 3 with the 2.3L engine. If you dont already know, it uses the cartridge type oil filter. The only filter I can find to fit my car is either the mazda filter or a wix(57203 - this is what I have been using). I am thinking about running the wix filter with mobil 1 synthetic oil. I was just wondering how long my OCI will be? And, is this even a good idea or is the filter not good enough to handle a longer OCI? Do you have any other suggestions for me? I am open to anything. Thanks!