I've got a question that I need answered in terms of severity. About a week ago I purchased a 1990 RS with the 305. Everything is in good shape and only has 120k on the original motor. I started my bumper to bumper tune up yesterday and for the first few hours everything was going smoothly. I took the oil cap off and it looked kind of dirty, nothing too crazy so I decided to flush it out. Ran the flush, went underneath to drain it all out. No problem with the drain plug but when I went for the oil filter it felt like the damn thing was cemented on there. So I reach for my filter wrench and it still woudln't budge the filter. Now I'm 6' 9" about 243 and a kickboxer so I think i'm in pretty good physical shape. No amount of brute force with my hands, the filter wrench or anything could move that filter. I grab my PB Blaster (penetrating catalyst) and shoot it on around the seal, wait a min then tap the handle of the oil wrench with a mallet, then I tap harder. The wrench is slipping around the filter and does NOTHING. I check the wrench and its in perfect shape so at this point i'm starting to get agitated. 3-5 more tries with different things and it was pointless. Now i'm an hour and a half into 1 oil change so I decide to throw caution to the wind and I take an old flathead screwdriver and use my hammer to punch it through the center of the filter so i could put a pipe on the end for better torque. NOTHING!!!!! So now i'm kind of nervous because I was thinking that someone put locktite or something stupid on to seal a leak on it. Before I give up for fear of damaging anything, I had my friend hold the pipe straight so I could get a good wind up. BAM! the screwdriver rips alomost all the way around the filter and I finally broke the seal. It was a struggle to get the thing all the way off but it was finally off. I examine the filter and can't see the brand name or manufacture date (worn off) I replace it and the oil with Mobile 1 oil and filter, runs a lot better. Now could this have been a freak incident? or does it show signs that the previous owner hadn't changed the oil in a REALLY long time or just never replaced the filter? I'm not sure what do think about the situation. Thoughts?