On Mon, 9 Aug 2021 at 04:09, James Landau <savegraduation@yahoo.com> wrote:

Well, I finally came up with something . . .

nagh nIn

rock fuel

It's a calque of the Latin "petroleum".

I think {nIn} by itself would probably suffice in many contexts, if you're already talking about cars and trucks and so on.

Just don't call it {SIp}, as people in some countries on Earth apparently do.

De'vID