Here is the VOA of Castrol's new GTX Ultraclean 5w30 oil. I believe they have added group III to this as the technical data sheet now says "synthetic blend". It looks very close to the older GTX formulation if not a little thicker viscosity. I know that PQIA hasn't tested this oil yet, but based on my tests of the older GTX oil, the results were close to PQIA's results. I'd like to see what PQIA finds in comparison to my test. I'm thinking of using this in my 06 Scion tC (2az-fe engine). I could go full synthetic on the tC but just looking at everything that's out there. I think this would work well for the tC.