My local Walmart has allowed their stock of Mobil 1 to run low. There is now no 0W-40 at all, and it's been like that for over a week. The last time they did that is was Truck and SUV 5w-40, and low and behold 5w-30 appeared en mass. Other products are low too, although I've not taken much notice as I use 0W-40. I'm just trying to remember - I think 0W-20 was out of stock too. New versions of Mobil 1 imminent? Anyone?