I live up in Canada and the propane vehicles have to be dual fuel. They can't start on propane in the real cold, it won't flow so they start on gas and have heaters for the propane line I think they told me. Some taxi cabs just use single fuel ok because they never shut them down.
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com
(10 new albums added Sept 16/10)