I have a 91 non intercooled Cummins. With the new sulfer fuel anyone tell me which additive I should use for my truck?

 

welcome to df... I would use the "Drews Brew", info tacked at the top of this forum. you may want to play with the amount of MMO in the mix since it's what is providing the lubrication. IIRC, your setup shouldnt have too much problem with the low sulfer fuel, hopefully Drew will provide a better answer (he's the expert).