viscosities are available than when our cars were introduced. I was running the Mobil1 15w-50 for a while, but think even that, may be to heavy for good protection during start-up, and 10w-30 seems a bit thin once things warm-up. I'm strongly considering the Mobil1 0w-40 or maybe even the 0w-50 products. Just my own personal thoughts/preferences.