Related Clues:

• Big rig fuel
• Motoring need
• Semi engine
• Petrol, stateside
• You get it to go
• Semi-filling liquid
• __ station
• Reason to stop on a road trip
• Good time, slangily
• Ethane, e.g.
• Natural __
• Hydrogen or helium
• Fuel for a Fiero
• Oxygen or hydrogen
• Helium or radon