essientialube
YES I have not only heard of it I have used it. In the early 70s we used it in the diesel trucks that hauled from Colo. to Utah and back. It is a fine additive , just be sure that you have fuel additive and not oil additive. The oil additive is real good to just not in the fuel. On a personal note I used to love the smell of it But the green color is hard to wash out if you spill it. :--)