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20 gallons in both the coupe and sedan.
The 2004 Infinity g35 does provide good gas mileage, in my opinion. It can run twenty-five miles on 1.25 gallons. I find this to be good gas mileage, but that may vary in other opinions.
The gas tank on the 2012 Infiniti EX holds 20.0 gal..
The gas tank on the 2011 Infiniti EX holds 20.0 gal..
The gas tank on the 2013 Infiniti EX holds 20.0 gal..
The gas tank on the 2012 Infiniti M holds 20.0 gal..
The gas tank on the 2012 Infiniti FX holds 23.8 gal..
The gas tank on the 2011 Infiniti FX holds 23.8 gal..
The gas tank on the 2013 Infiniti FX holds 23.8 gal..
The gas tank on the 2014 Infiniti Q50 holds 20.0 gal..
The gas tank on the 2014 Infiniti QX50 holds 20.0 gal..
The gas tank on the 2014 Infiniti QX60 holds 19.5 gal..