Related Clues:

• 16 (US)
• Carbon dioxide, say
• Ethane, e.g
• Solid alternative
• Utility bill item
• Fastball, in baseball slang
• It's a driving concern
• Jeff Gordon goes nowhere without it
• "Juice" for Jeff Gordon
• Car's need
• Ozone, e.g
• Source of bloating
• Cooking choice
• Car "go" liquid
• Road trip necessity