The reason I'm asking is that I tried to change the oil filter on my '99 Intrepid, but it appears to be stuck, extremely difficult to come off. The cap thing,(I used 2 diff. kinds), just slips. I tried to wedge sand paper for grip, but no luck. I change my oil on the short side, so last oil was about 2,500 mi ago when stuck, now another 2500 mi. I'm using a 50-50 mix of Penn syn & dino. Car has a shade under 200K. The oil filter is a Pro-Line from Pep Boys. The only solution is to try another cap or to have it done outside. Any opinions? thanks.