Castenea wrote:As for the problems with sulpher is oil, remember that there is little to no sulpher in Gasoline, and only small amounts in the diesel you buy at gas stations.
The #2 Diesel Fuel you buy at the local station today has very tightly regulated amounts of sulfur and other contaminants. That wasn't always the case; as little as thirty to forty years ago, Diesel engines were dirty, smoky, foul-smelling creations that contributed greatly to smog and acid rain.
Fire-vine oil or other bio-fuel possibilities on Safehold may well eliminate that bit of Diesel fuel history, but rock-oil has to be refined and cleaned up before it comes close to the kind of fuels we use in the real world. (Hopefully Safehold can bypass tetra-ethyl lead as the anti-knock compound of choice.)