Really? Did you sleep through all your high school science classes? Sulfur is a corrosive and when burned it is a poison. There are some greases used in heavy machinery that incorporate sulfur in the mix. The machinery has sacrificial metal on the bearing surfaces that serve as lubrication while the sulfur erodes it away.GAmes - Care to expand on sulfer in diesel not being a lubricant? Did some searching and everything I am finding says it indeed helps increase lubrication.