Anyone know anything about this oil? I saw it at a local parts store last night. It had a warning on the front of the bottle "Not for Street Use", and the back of the bottle went on to explain that the high levels of zinc in the oil will poison your converter. The MSDS shows 50-60% hyrdotreated (Gr II/III) but does not say what the other 40% is (PAO? Ester?). Could this be a good "sleeper" oil?