In Italian, if I were in a house and said Sento odor di gas. (approximately, "I smell gas."), the person to whom I am speaking would probably go check the stove or the water heater, which is normally in the kitchen, or the bathroom. For cooking, we normally use methane, and methane could also be used for the water heater, although in some cases the water heater uses electricity.
If I were to speak of my car and said La mia auto va a gas. I would be saying that my car doesn't need gasoline, but methane or LPG; I could also mean that my car uses gasoline, or alternatively methane or LPG.
Is gas ever used in a similar way, in American English? Even if it used for a different substance, is there any substance that is called gas (excluding gasoline)?