Moonshine, yes. The story as I heard it:

Years ago, people powered their primitive early 20th century automobiles with either gasoline or alcohol. Farmers used alcohol primarily because they could make it themselves out of grain and because their farm equipment had engines that burned it. They could also drink any left-over product. So along comes John D. Rockefeller and Standard Oil, and he pays the Women's Christian Temperance Union to lobby on behalf of Prohibition. This movement becomes quite successful, but it leads to the demise of alcohol as a fuel. Well, how fortuitous for the petroleum companies, as it then leaves the market wide open for gasoline. And this is why today we burn petroleum-based fuels in our cars rather than alcohol.

Anyway, to answer the OP, I am partial to the very smoky Islay single malts (Laphroaig, Lagavulin, Caol Ila...).

Luis