Yes, I just recently put Pennzoil Conventional 10w30 in the Jaguar. Not a single complaint with using Pennzoil Conventional 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 0w30 or 5w30 would you pick? Pennzoil Conventional 10w30 was selected for low NOACK and it also seems to have the preferred conventional add pack around here. Me? I'm thinking 5w30 Ultra or Platinum off the top of my head. I'd most likely go with synthetic for the extremely cold starts.