Related Clues:

• It can come from a Shell
• Pilot feeder?
• What makes motorcycles go
• Some actor's agent up in neon lights?
• Endlessly pant for air
• What a hybrid car saves on
• What the sun and Sunoco have in common
• Phosphine, e.g
• Necessity for many cars
• Air, for instance
• Gallon as fuel
• Energy one might run out of
• Fuel in megastore
• Car-go necessity
• Need for the wheels on the bus to go 'round and 'round