to all my dear friends who like Mobil : A better synthetic (made by Mobil) is Delvac 1, designed for fleet users and heavy duty applications. Delvac 1 can be obtained at Mobil distributors and places who cater to trucks (some time you can find it at big truck stops), comes in a gallon container (or 55 gallon drums) only and I think is cheaper that Mobil 1 , Avi Meron