Related Clues:

• Automobile sticker fig.
• 87 or 93 at the pump
• Abbr. in car ads
• Numbered gas rating
• Gas rating
• Gas pump rating
• Car ad abbr.
• Shell designation
• Car-sticker stat.
• Anti-knock measure
• Premium number
• Sticker datum, for short
• Fuel economy letters
• It's often in the 90's
• Gas pump number