Last week we went wheeling, and one of the guys who drives a ZJ posted for a new trip. He is going to be bringing his 70 something CJ, now he says soon its going to be propane powered. Now I did a search and all I found is that it has higher oxygen content than gas. Does this actually power the jeep, or is there a mixture of gas/propane. So what advantages does propane give you, I am not 100% sure, but I thought propane prices are shooting through the roof too.