Thanks Manny, that's great news! I've been using 15W-50 Mobil 1 for years.

I know that when Porsche starting putting 0W-40 in their cars at the factory, they recommended 15W-50 as a replacement because 0W-40 wasn't available in the U.S.

I guess I should buzz down to Walmart and buy more of those 5 gallon containers of 15W-50 now that I know I can use it in my next car