It seems that many more vehicles in Canada use propane as their main fuel than in the US. So there is often a propane pump either located in the row with the gasoline and diesel pumps or over by the side at stations and roadhouses. Either way they seem to be self serve on propane. Have watched several Canadian drivers pull up to the propane pump, attach the nozzle to their propane tank and fill it, then go in to pay. Don't remember if any of the propane pumps were credit card friendly or not. Road propane was much cheaper than gasoline.