Gentleman
Sorry about empty post not sure what happened.
A couple of years back everyone was talking about compressed natural gas which was supposed to be around 140 octane and safe because if the tank got ruptured it went straight up instead of spreading along the ground. There was a few systems around that allowed you to fill up at home suposedly, then it just dropped out of the "NEWS". Has anything ever progressed with that?
Big Bill

Been there, Done that, Hope to live long enough to do it again.
Big Bill
I.I.# 4698