[Matt L]

It may not be the oil filter housing at all. Do you see that diamond shape cover right above the belt tensioner? That cover has a seal behind it and that will create a leak but usually while driving when oil pressure is built up, the belt itself will fling the oil everywhere.

I do see it, right above the tensioner. Quite recently, someone posted a picture of it copied from a catalog. It sure does look oily right below that piece.

But what's this about twisting the filter housing, or not? I'm sure that it's because I haven't ever seen the filters that you gasser guys use, but I really cannot picture what you are talking about.