(OOC: So maybe just say Korra can, but not an Instant Expert? I'm good with that! ...Hmm, do you think we'd need mod approval for even her being only able to bend gas a little, at first? Unless gas definitely has earth in it....)

I can definitely bend rocks. Is there something like rocks in gasoline? I think it was said before that it comes from fossil fuel...and fossils have some rocks in them, right?