I have a hard time with Rotella 15w40. Nowhere in their literature is Diesel Motor OIL rated for Gasoline Engines. They do list T6 5w30 Multi Use for gas engines. Oil companies stand behind their product. If you have a gas engine and have a lubrication failure, that turns out to be CJ or CK rated oil that you used, they are not going to help you. If Shell tells you not to use it, do you believe them, or the guy that says they don't know what they are talking about.
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1968 Firebird 400 RAII M21, 3.31 12 bolt, Mayfair Maize.
1977 Trans Am W72 400, TH350, 3.23 T Top
Everyone you will ever meet knows something you don't.
Bill Nye.
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