Originally Posted by Prius2Camry

I do not use synthetic oil because I do not drive my hybrid every day or two. Synthetic oils are so slippery that if a vehicle sits unstarted for 3 or more days, the oil will drain off those critical and not quite so critical parts. The thought of starting the ICE without many of the parts being properly lubricated makes me shudder! Can you say rapid, excessive engine wear?