One of the weirdest bits of labeling I have ever seen was a caution that the contests of a bottle were "not non-inflammable".

Just what exactly do you think our current cars are putting out? We are putting hydrocarbons into the fuel tank (H and C) and reacting them with oxygen from the air. Results? CO2 and H20. Okay, there would be more water from hydrogen cars as they can't get any energy from forming up those CO2 molecules, but current exhaust is by no means dry.