I used to use Lucas fuel additive with great results, but I read on a different Diesel board about 2 Cycle oil from Wally world. It runs quieter feels like it has more power and got about .5 to 1 mpg better mileage. Im getting almost 19 in town loaded down with equipment and towing a trailer.

 

Probally been answered here somewhere, but does it cause them to smoke? I know what happens when you accidentally put mixed gas in a gasser.

 

i used synthetic 2 cycle ...... BAD IDEA.... stick with ATF people it has detergent that will keep your injector tips cleaner that 2 cycle could ever do .... and it burns great i usually run 1 qt every tank if im towing and 1 qt every other if not and i have no O/D .... i get 20
I swear by it always..... the 2 cycle was not a good idea ... 7.3idi didn't like that one bit

 

If your truck has a DPF, i wouldn't use 2 cycle oil, ATF, motor oil