The 8.3l is the diesel only. I didn't bother calcing the lpg as both times I have filled it up so far has been around $6 to top it up. Must be a really small tank. As it's only augmenting the air supply rather than running on it I suppose the amount squirted in must be quite small. I am happy about the fact that the diesel burns cleaner and a supposed small boost to power. Hard for me to comment on that as I have nothing to compare it with. It came with it. I could turn off the lpg for a while I suppose.

