I heard that propane has a similar effect on Diesel engines that nitrous oxide has on gasoline engines. Maybe that's what they meant.

If it's really one fuel or the other, which MB engine do they convert? Maybe one of the commercial engines. Is there a different cylinder head for it? There isn't room for a spark plug in a 60x, 61x or 62x combustion chamber. How do they get propane to run at 20:1 compression ratio and not blow the head off the block?

Sixto
93 300SD 3.0