I just ordered 18 quarts from them for our vehicles. I'm going to also use it in my wifes Volvo XC, as I feel this is the ideal weight for us in upstate NY. If I lived in a real warm climate like Texas, Arizona I'd use the 15w50. By the way, another poster had said that Mobil stated the 0w40 would be more readily available next year. I think even Mobil is seeing the light on this weight oil and going to offer it at more retail outlets. What I have been using for my mid FSS change is Mobil 1 Delvec which is a fleet oil, 5w40 weight and was recommended by Mobil as a substitute if I couldn't find the 0w40.