Synthetic Oil

Originally Posted by jp's-h3

When I had my 86 4runner (211,000 when sold) I used Engine Restore at every oil change. It really seemed to help out! engine ran smooth, burned very little oil, stated right-up!
Most of these oil additives are recommended for high mileage engines. I'm really not sure if it is such a good idea to use any of these additives in a low mileage engine!

Nice to know. But I think the fact that it was a Toyota truck had a lot more to do with the good long life (211K) than the use of Engine Restore.

[marin8703]

question about this oil stuff. if you got to synthtic and then back to conventional the engine migth develope leaks at seals or whatever. if you then again switch to synthetic will the seals do good again or still leak.

reason im asking is in our ford i switched it to synthetic, but then i took it to firestone cauze i didnt have time to change it myself and told them to put in synthetic, and thats what the invoice said they did, but after that change i've been noticing some oil on the underside. tomorow im going under it to see whats up.

thanks for replies.