I just noticed on the Ford website that they will be offering an engine powered by natural gas/propane on the Transit cargo van. I wonder if any of the Class B manufacturers in North America will produce an all propane powered model in the near future?
Alternative fuel options for gas and diesel engines.
3.7L V6: CNG/LPG Gaseous Engine Prep Package* for power conversion to compressed natural gas (CNG) or liquid propane gas (LPG)
I think the infrastructure is not there to support general consumers with these alternative fuels. Fleet owners can build regional hubs to provide the LPG or CNG.
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A 2014 Ocean One MB Sprinter by Advanced RV named "Imagine"