Propane is 5 - 6 lb of solvent per lb of dry material, I’d say.
I figured it was more. Just wasn’t sure, as I haven’t used it by itself, yet
Propane by itself is pretty nice. I’ve also had really good results using it hot. Stink your tank in a bucket of steaming hot water for about a minute or two (till the top of the tank feels warm), not too long or the pressure will get too high for the tank, depending on how much gas is in there. I’ve seen consistent 18% - 20% yields of saucy golden sugar from using hot propane on good trim. I bet you can find out and even better tek, though!
Try soaking cold, then letting it warm up in that same # range, 20-30mins