The best engine oil for any car is the pioneering industry leading AMSOIL synthetic motor oils, (pronounced AMZ-OIL), "The first in synthetics", (tm). Check my website.
I own a 91 bought in 1990, and I used what I like best, and never a single engine trouble , I do not swear by it but its castroil SAE 5W20 @ 110K. can't kill these engines.
If you ever make it back here let us know what you use.
