2009-2013 Infiniti G37 MPG & Fuel Cost

EPA rates the 2009-2013 Infiniti G37 at 19–22 MPG combined across 37 configurations and 5 model years. The most efficient version, the 2013 Coupe 3.7L 6-cyl RWD, is rated 22 MPG (19 city, 26 highway).

The Coupe 3.7L 6-cyl RWD reached the generation's best combined rating, 22 MPG, in 2010, 2011, 2012 and 2013. The lowest top rating, 21 MPG, was in 2009.

Yes. Ratings changed in 2010, 2011, 2012 and 2013.

The previous generation (2008 Infiniti G37) is rated 20 MPG combined and costs $4,020 a year to fuel; the 2009-2013 model is rated 19–22 MPG and costs $3,650–$4,260 a year.

Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the Coupe 3.7L 6-cyl RWD costs about $3,710 a year. Across all 8 configurations the cost runs $3,710–$4,260 a year. That is a $550 difference between the cheapest and the costliest configuration.

About $24.73 per 100 miles for the Coupe 3.7L 6-cyl RWD at premium gasoline $5.36/gal (U.S. average, Sep 2026), and between $24.73 and $28.40 across all configurations. That is the annual cost over 15,000 miles divided by 150.

The Coupe 3.7L 6-cyl RWD is rated 19 city and 26 highway MPG, so it is more efficient on the highway, by 7 MPG.

The Coupe 3.7L 6-cyl RWD costs about $3,710 a year to fuel, $520 more than the class median of $3,190, and less than 3 of 10 small car configurations. The comparison covers all 386 rated small car configurations for MY2013, not weighted by sales.

The most efficient configuration stays at 22 MPG. Its annual cost goes from $3,720 to $3,710, $10 less. EPA lists 8 configurations for 2013 against 8 configurations for 2012. See the 2012 Infiniti G37 for that year.