An (really?) "ICE" aka internal combustion engine isn't limited to gasoline it can also burn alcohol, natural gas, propane and I'm sure many other less smelly f

An (really?) "ICE" aka internal combustion engine isn't limited to gasoline it can also burn alcohol, natural gas, propane and I'm sure many other less smelly fuels. Diesel is another but it's a bit smelly although I was behind a Mercedes diesel SUV and didn't realize it until I read the rear badge, no smell at all. Although bio-diesel or even straight vegetable oil can be burned since Rudolph Diesel intended the diesel engine to run on peanut oil so farmers could afford the fuel.