Mag 1 62891 Dexos1 SAE 5W-30 Motor Oil - 1 Quart Bottle Formulated to prevent engine wear even in the most severe GM tests Mag 1 dexos1 exceeds the performance limits by 65 percent Keeps pistons cleaner, minimizing oil consumption and maintaining power and compression performance Chemistry significantly outperforms the industry requirement, reducing engine sludge to near zero Emission conserving protecting the car's catalyst system to help protect the environment Exceeds GM dexos1 specifications for world wide warranty requirements for all GM automotive gasoline engines currently in use