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Hehe, to make matters more confusing, I had my oil changed at Performance Nissan on Saturday and they used Castrol "Syntec", which the service manager said is a blend of synthetic and regular oil.
hehe i remember when they said your not subposed to mix the two.. and now they sell it that way lol... besides when you first do a oil changover your mixed anyway because you have the reg oil still all through yer engine..