[DenisM]

Gasoline doesn't store well over a length of time, you might want to look into that before it clogs up your engine.

[brightball]

The engine will actually crank up and run for that exact reason if it sits for a while.

[mikeash]

And it has a sealed gas tank to keep the volatiles from evaporating away.

[outworlder]

That's already handled by the Volt.