I've been using Advanced Auto's oil filters, Total Grips, for that last few oci's. For some reason they are a real pita to try to remove. Even with a oil filter tool it's hard. I don't think I tighten them any tighter than the purolators I used before, and they came off usually by hand. I'd like to keep using them since they're cheaper but if I have to fight them much more i'm going back to purolators. Anyone else have this problem?