lamin8r, my Dodge was supposed to be dual fuel but the PO never used the gasoline EFI so it was all clogged up and disconnected. At -40, I had to drive something else, the propane wouldn't flow.
Another thing...with any pressurized gas, you can't use underground parking, and they get all hyper when you drive on a closed ferryboat. They make you shut off the tank valve as soon as you stop. And I've been told, but never looked in to it, that if your garage goes up in flames with a propane vehicle in it, there's no insurance. Which all seems strange when you consider how many little forklifts there are in big warehouses that are running on propane so the monoxide doesn't kill everybody!
BTW, you are talking LPG gas, which is a different animal altogether from propane. Thousands of pounds pressure in the tank instead of less that a hundred with propane. Around here, you need a megabuck compresser to use that stuff. A neighbour had a test setup installed for free, and he still said it didn't pay! He ran all his tractors on LPG, as well as his road vehicles. In busy farming seasons, the compresser couldn't keep up with the demand of all the machines needing fuel every night.
No, thanks, I'll stick with gasoline!