Just an interesting note, I spoke with Cummins on the phone a minute ago and their "Official" response to the need for fuel additives for lubricity is that the new fuel meets all of their standards for lubrication. I did ask about the Valvolene product that has the cummins endorsement and they said that was for injector cleaning only and the only time they would recommend an additive is to prevent fuel gelling and if the vehicle is going to be sitting for an extended period of time... . Just FYI I guess with all the new additive talk. . I plan to keep adding a little to each tank anyway Oo.