It?s low for gas guzzlers: Abbr.

• Fuel-economy letters
• Fuel efficiency no
• Car-sticker info: Abbr
• Fig. on an auto sticker
• Dashboard abbr
• Auto ad stat
• High hybrid stat
• CAFE concern
• Fig. of concern to a car buyer

Wiktionary Word definitions in Wiktionary
init. (alternative form of MPG English)