Well I cannot find any Mobil1 T&S anywhere. I live in Ft. Washington, MD. I went to all the Auto Zones and Pep Boys and drew a blank each time. I have my oil done at a Quick Lube for 7 years. Same guy's always worked there and they have not even heard of it either. Is there somewhere that even sells the delvac1? I cannot find it. I am going to switch to this "diesel oil" because I have been reading how good it is for engines and it will definitely be a benefit to my engine which I plan on taking to 500,000 miles hopefully.