How do I get the original fitment oil filter off a v6....Not the normal spinoff/spn on ones, but the one with the internal element. It's got a nice 3/8" hole at the end, and you can get a spanner on the outer hex section, but mine won't budge.. Should I just push harder, or is there something different I should be turning. (and why do Vx fit these - what is wrong with a common or garden disposible) Rich