Huh...that sucks. After reading this I had to dig up the MSDS on the Valvoline "SynPower" I use. Looks like SynPower is a group 3 cracked hydrocarbon, even though right on the label it says "100% Full Synthetic." Kind of sneaky, especially since Valvoline sells a synthetic blend for about half the price of their "full synthetic." At over $4/qt I just kind of assumed I wasn't buying distilled dino juice.