Which oil to use on USED car

j/k-- I've been very happy with Chevron 10W-30, cheap by the box at Costco. I've had the oil analyzed and got excellent results.
see here--> https://www.s2ki.com/forums/index.php?showtopic=276995
I interpret the original question as whether to use mineral oil or synthetic oil. If the previous owner switched to synthetic oil, would it do any harm to change back to mineral oil. Please correct me if I interpreted it wrong. But welcome to the board and the S2000.
no you can change from synthetic back to mineral no problem.
if the car has over 50k, use valvoline max-life. one of the best synthetic high mileage oils you can get.
read the oil journals in the tech forum here on s2ki.com
https://www.s2ki.com/forums/index.php?showtopic=195574
if the car has over 50k, use valvoline max-life. one of the best synthetic high mileage oils you can get.
read the oil journals in the tech forum here on s2ki.com
https://www.s2ki.com/forums/index.php?showtopic=195574
if you're curious as to what kind of oil is in there, just lick the dipstick. synthetic definitely has a distinctly "synthesized" taste.

note to Darwin award candidates: I'm being sarcastic.

note to Darwin award candidates: I'm being sarcastic.








