Hey guys, new here coming over from the Dodge side of things. There has been a huge discussion on the Dodge Cummins forums going back over a year or so. In a nutshell, it improves lubricity thereby increasing mileage, burns off clean since its desugned to burn in an internal combustion engine anyway.
The Wally World stuff is the most popular and some have done scientific testing and it showed its the best option. They say use a non marine-non synthetic two cycle oil and your good to go.
I used it on my Cummins and am using it now in my new F250, the tank had two cycle in it before the odometer passed 40 miles.
Also, cetane boost and additives were shown to have negative results on lubricity, especially when combined with ULSD. Anyways, heres a link to the revised topic, some good info in there. Hope it helps.
2-cycle Oils - Recommended List