I want to make sure I'm istalling the oil filter gasket properly. I put it over the threads and slide towards the top of plastic cover right? once I do this then snap in the filter and screw in and everything seems to be fine.. then after driving there apears to be a small leak!? last time this happened I loosend the plastic cap and tightend a little looser and that seemed to do the trick. I did the same this time and it still seems to have a minor leak. Is the gasket shot or am I istalling it wrong?