an oil only has to perform like a synthetic oil to be called a synthetic oil, true synthetic oil is made from group 4 PAO base stock, research PAO in OIL and you'll understand it better. there really isn't a lot of true synthetic oils. any true full synthetic oil will cost you, most are 12 bucks and up for a quart, if your paying less than that you can pretty much bet its a blend, not 100% synthetic. the yamalube 15/50 full synthetic states it's "fortified with ester" leads me to believe it's a blend, i can't find what base stocks are used for that oil which is usually the case for blends, but i don't know for sure
dumb bikers don't get to be old bikers
Last edited by pauli466; 04-17-2017 at 08:05 PM.