[tireburner163]

I use Castrol Syntec in my 2.3, and yes it is very expensive(about 24 bucks for a case of 6). I have to real data to back this up but, take regualar oil with 3K on it, then take synthetic oil with 3K on it. Rub both between your fingers, you can tell the difference.

But in retrospec I am prob. wasing my money. But I can't switch back not(can I?)