oil?

I'm gonna have to go with smoked chevy and say regular oil. Synthetic is alot slicker than organic oil and if you have a small leak with organic oil, you'll have an enormous leak with synthetic. If you don't have any leaks, it should work great, but having to add a $4 of oil every 1000 miles for example gets tedious. I say go for it if you don't see any leaks or if you're willing to fix a leak if it develops.