You know, Mobil 1 is available in 19 different formulas, including two new ones that I have never seen on the shelves, called "Advanced Fuel Economy M1" and sold in 0W20 and 0W30 formulations. When you add their EP, High Mileage, Truck and SUV, Diesel, and Motorcycle M1's to the regular M1's, and consider all of the different formulations that go into these oils, you need to specify which specific M1 you are talking about.