An FFV can use ethanol or methanol or gasoline (or some combination) thanks to a chip and some plastic fittings in the fuel system.

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As fuel it uses liquid nitrous oxide and solid polythene plastic.

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What's more, although more people have paid in cash for gasoline since 2010, when the chain started offering the discounted cash price for fuel, about 80% of fuel sold at his stores still is paid for with plastic.

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It is the first commercial jet built mostly from carbon-plastic fibres rather than conventional aluminium and steel, making it more lightweight, and therefore, fuel-efficient.

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The Dreamliner uses technology that allows much of it to be made of plastic composites instead of aluminium, which means it is lighter and, Boeing claims, will consume 20% less fuel than other, similar-sized planes.

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