Just noticed these stains below the head around the oil filter. The gasket was done prior to me owning the 80 about 20,000 miles ago. (Due to a failure) I have probably only added half a quart of coolant in those 20,000 miles. And burn maybe 1 quart of oil over 5000 miles. Oil seems clean. Coolant also seems clean. Just never noticed this before. Also runs fine. Maybe a slight miss once in a while during idle. I assume that is sensor related. It is weird the stain turns white after things heat up. I don't notice any leaks while running either. Would anyone else worry about this?