I ran synthetic in the 318, ran beauifully. i did how ever get a valve cover gasket leak right after doing this..heh.
I would say run conventional oil, seeing how it was originally designed for it?
__________________
We all get the urge...Saturday early morning...nothing to do till noon...

BMW FTW

The aural sensations of 1st gear WOT
**CGM **(Certified Garage Mechanic)