Related Clues:

• Power, so to speak
• Antiknock rating
• It prevents knocks
• Gasoline rating number
• Motor fuel rating
• Pump stat
• Pump measure
• ___ rating
• 87 or 91, at the pump
• Gas-pump word
• Pump figure
• Anti-knock number
• Gas-pump number
• Compound occurring in petrol
• Hydrocarbon compound in petrol