Originally Posted By: cpurser
Ok, to end the mystery, I called the dealer. They use both M1 and Castrol synthetic. So maybe they used the Castrol.
-Chad
According to the one Syntec 5w-30 VOA we have, it uses about 100 ppm of moly and quite a bit more calcium than what showed up in your UOA. So, it doesn't look like Syntec 5w-30 to me either.
Maybe they were supposed to use it, but the tech just grabbed whatever was in his reach to fill your engine.