Yes, I just recently put PYB 10w-30 in the Jaguar. Not a single complaint with using PYB and will likely continue to use it if I stay in the southwest, but there's a possibility I will be moving back to the Midwest. Knowing how cold it gets there and for the sake of conversation since that's the whole point of this site, which 0w-30 or 5w-30 would you pick? PYB 10w-30 was selected for low NOACK and it also seems to have the preferred conventional add pack around here. Me? I'm thinking 5w-30 Ultra or Platinum off the top of my head. I'd most likely go with synthetic for the extremely cold starts.