Well, since it is the sulfur that our engines want, not the red dye, does anyone know of a way to make up a fuel additive? Could be added to road-taxed, legal pump fuel? Kinda like the lead additive for 60's gassers not designed for unleaded?
I mean, is this just plain ol' sulfur in the fuel like one could order from a chem supply company, or is it like the 'lead' in leaded gas that is actually tetraethyl lead and would need some more involved chemistry to make up...

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1971 220D/4-speed ~250K mi. Family owned (dads side) through three generations since <5K miles.
1992 Chrysler LeBaron, 3.0V6 125K. Family owned (moms side) through three generations since new.
1977 Chevy Camaro Continual hotrod project
1970 Cadillac Sedan DeVille 472ci and nearly 19' long
1974 Fiat Spider Still needs work