OK….. I have heard all the good stuff about the Synthetic motor oils and I have always heard that you are supposed to break in a new motor on Fossil oils, and then, after “X” number of miles or hours, you can make the switch to the synthetic.
My wife’s BMW, and the new Corvettes (and maybe some others) come from the factory with 0 miles and the Synthetic oil is already in them, and I was wondering if you really need that break in period?

What rules are you guys following in regards to the Fossil/Synthetic usage?


Krash
Dallas TX