Do you guys use syntetic oil for highmilage cars in your sc ? Did anyone used seal conditioners in their cars and does it stops leaks?

 

Tried it on my radiator when I KNOW they don't work. Never have w/ any kind of oil leak and probably never will. I'm leaking oil from somewhere and have yet to fix it. I wouldn't recommend the oil sealers. Just fix it.

And my car, (170ish on engine and 288,XXX on chassis) uses synthetic.