Recent content by dusted off

I drove my first car (used 1989 Mazda MX-6) back in the 1990s from 47,000 mi. to 185,000 mi., city driving, many short trips, 7500 mi. OCIs on whatever name brand conventional 5w30 oil I found on sale. I gave it to my brother and he put ten of thousands more miles on it. IIRC I was adding 3/4...