Question: 1982 Chevy truck with a 350, 87k miles, oil changed
religiously at 3k, runs like new. Can I switch to synthetics?
I would not switch to synthetic. You may get some leaks that are “plugged” up now. If it runs fine then stay with what works. Those old GM will be fine on most any oil.
I would not switch to synthetic. You may get some leaks that are “plugged” up now. If it runs fine then stay with what works. Those old GM will be fine on most any oil. Go over to bobistheoilguy.com and ask the experts over there if you want more ideas.