Coolant appears to be normal green coolant. Had had green in it since I bought car. No coolant loss or coolant level rising. Oil isn’t milky. The over flow bottle has a slight black tint on the inside. But never overheated (was 74 today) a/c cranked, 80mph down interstate. I noticed sometimes from dead stop if i do a hard take off it’s a little sluggish till 4k rpm then clears out. That’s intermittent as well doesn’t do it all the time. And everything just smells like burning oil. On a fb group someone said there has been some very rare cases about an oil return In the head that might be plugged. I’ve considered a bad cat and thought about cutting it out and straight piping it. Going to replace oil pressure switch tomorrow