Not sure what advantage using more sulfur in diesel would be. Even the engine manufacturers have extended oil drain requirements now that ULSD is pretty much standard. Sulfur just creates sulfuric acid and sulfur dioxide in the engine. Now, for it's lubricating qualities, which is questionable, most every engine made in this century has components that are designed around ULSD. And a lot of places are now putting biodiesel in the mix in some percentage. A 2% biodiesel blend alone will raise the lubricity to pre ULSD levels. Even more and the lubricity will exceed LSD levels. But if it makes you feel good, then go ahead and get the LSD fuel. Whatever you do, base it on sound reasoning and not some wive's tales about ULSD. Hint, hint.... it wasn't the sulfur that was the lubricity agent. The process used to remove sulfur from diesel also removed many of the lubricity agents from diesel. Federal fuel standards mandate that some lubricity be added back in to meet minimum standards.
