Ok guys right now i'm running castrol GTX 5w30 dino(first oil change after prev. own.). Before that previous owner always used dino oil and never syn. So my next oil change i wanna switch on Mobil 1 full syn but i'm scared of oil leaks right now i have none car has 160k miles and i don't know what to do now. I wish to treat it only with good stuff can i do that. Or i have to stick on with dino foreva
I've read about guys who actually switched on syn without problems but their cars was only like 80-100K but i haven't heard anything with high milege

 

If it leaks with synthetic, go back to dino. No big deal.

As long as you change it every 3k and keep a new filter in there, the syn./dino debate is pretty much irrelevant for a daily driver.

Dave

 

Run AutoRX through first. You need two bottles for two applications. Go to www.auto-rx.com. Join www.bobistheoilguy.com and run a search in the Additives forum. The product will rejuvenate your seals, while cleaning your combustion chamber and ring packs. The outcome will also be a reduced chance of oil leaks.

I just used it before switching to synthetic oil, albeit my car only has 63K, mostly highway miles on it. I started the trial at under 60K.

 

i have 150k and want to switch to castrol synt. 0w30. First i'm doing the auto-rx treatment.