Quote:
Originally Posted by JCunningham
didnt test Amsoil
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If you are referring to me, i havent tested any
Just listed their data sheets stats for comparisons. But Dexos website lists tons more choices, thats for sure, especially in 5w30 and 5w40 grades. Yet GM specifically recommended Valvoline MST product in the latter category hence thats the one i have included. SAE 15W50 doesnt call for Dexos, so i suppose it is up to an owner to decide what manufacturer to use. Hope this clarifies. Cheers!