We may look at a C150D here in FL this weekend. Logs show damage history in late 90's. No oil filter (not sure how bad this can be). But looks clean and healthy.
Our 150 doesn't have the oil filter STC done either. I don't think it is a big deal. I change the oil at 25 hours instead of 50, but I have always been one in favor of more frequent oil changes. For a Florida airplane, my main concern (if I were looking) would be airframe corrosion.
