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Infiniti G Fuel Economy (g/100m)

g/100m Number of Vehicles
3 gallons per 100 meters 2 vehicles
4 gallons per 100 meters 9 vehicles
5 gallons per 100 meters 17 vehicles
6 gallons per 100 meters 3 vehicles
7 gallons per 100 meters 0 vehicles
8 gallons per 100 meters 0 vehicles
9 gallons per 100 meters 0 vehicles
10 gallons per 100 meters 0 vehicles
11 gallons per 100 meters 0 vehicles
12 gallons per 100 meters 0 vehicles
13 gallons per 100 meters 0 vehicles
14 gallons per 100 meters 0 vehicles
15 gallons per 100 meters 0 vehicles
16 gallons per 100 meters 0 vehicles
17 gallons per 100 meters 0 vehicles
18 gallons per 100 meters 0 vehicles
19 gallons per 100 meters 0 vehicles
20 gallons per 100 meters 0 vehicles
21 gallons per 100 meters 0 vehicles
22 gallons per 100 meters 2 vehicles
23 gallons per 100 meters 0 vehicles
24 gallons per 100 meters 1 vehicles
25 gallons per 100 meters 0 vehicles
26 gallons per 100 meters 0 vehicles
27 gallons per 100 meters 0 vehicles
28 gallons per 100 meters 1 vehicles
29 gallons per 100 meters 2 vehicles
30 gallons per 100 meters 0 vehicles
31 gallons per 100 meters 2 vehicles
32 gallons per 100 meters 0 vehicles
33 gallons per 100 meters 2 vehicles
34 gallons per 100 meters 0 vehicles
35 gallons per 100 meters 1 vehicles
36 gallons per 100 meters 0 vehicles
37 gallons per 100 meters 0 vehicles
38 gallons per 100 meters 0 vehicles
39 gallons per 100 meters 0 vehicles
40 gallons per 100 meters 0 vehicles
41 gallons per 100 meters 0 vehicles
42 gallons per 100 meters 0 vehicles
43 gallons per 100 meters 0 vehicles
44 gallons per 100 meters 0 vehicles
45 gallons per 100 meters 0 vehicles
46 gallons per 100 meters 0 vehicles
47 gallons per 100 meters 1 vehicles
Model Year Body/Powertrain g/100m  
2003 2003 4dr Sedan 330-hp 3.7L V6 7-sp shiftable automatic RWD 15.03
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With the turbocharged 155kW 2.0L I4 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, the 2003 Infiniti G has been averaging 15.03 L/100km (liters per 100 kilometers).

The 2003 Infiniti Gs in this analysis were driven mostly on the highway at an average speed of 85 kilometers per hour (about 46.9 percent of the kilometers driven). The rest of the kilometers were in the city (15.3 percent), in heavy traffic (9.1 percent), and in the suburbs (0 percent).

In addition, the average 2003 Infiniti G in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
2003 2003 4dr Sedan 260-hp 3.5L V6 6-sp manual RWD 4.35
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2003 2003 2dr Coupe 330-hp 3.7L V6 6-sp manual RWD 19.36
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2003 2003 2dr Coupe 330-hp 3.7L V6 7-sp shiftable automatic RWD 22.4
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2003 2003 2dr Coupe 280-hp 3.5L V6 5-sp shiftable automatic RWD 4.86
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What Our Members Are Saying about the Real Gas Mileage of the 2003 Infiniti G

2003 Infiniti G Real Gas Mileage: Cons
YearBody/PowertrainComment
2004 2dr Coupe 280-horsepower 3.5L V6
5-speed shiftable automatic RWD		 At the very best, my combined fuel economy never got above 20.4 MPG and is recenly under 19. see full Infiniti G review
2004 4dr Sedan 260-horsepower 3.5L V6
5-speed shiftable automatic AWD		 got between 14 and 17 mpg in the city see full Infiniti G review
2004 4dr Sedan 260-horsepower 3.5L V6
6-speed manual RWD		 The G35 takes premium gas and from my research it looked like it would average about 10 mpg less than the Solara. see full Infiniti G review
2004 4dr Sedan 260-horsepower 3.5L V6
5-speed shiftable automatic AWD		 16-17 city/24-25 highway see full Infiniti G review
2004 4dr Sedan 260-horsepower 3.5L V6
5-speed shiftable automatic RWD		 Currently get 25-27 highway and 21=22.5 in the city. Live in extremely mountainous terrain, so mpg would be higher in a flat area such as Nebraska or Kansas. I would have added a 6th gear and kept the power. see full Infiniti G review
2003 4dr Sedan 260-horsepower 3.5L V6
5-speed shiftable automatic RWD		 Very poor city mpg, almost as bad as large SUV. see full Infiniti G review
2003 4dr Sedan 260-horsepower 3.5L V6
5-speed shiftable automatic RWD		 Highway fuel economy should be better, maybe higher fifth gear for lower revs at highway speeds. see full Infiniti G review
2003 4dr Sedan 260-horsepower 3.5L V6
5-speed shiftable automatic RWD		 City fuel economy is terrible. (15L/100km) Highway fuel economy is not as good either. (8L/100km @ 105km/hr) if going any faster, the fuel economy get worse! see full Infiniti G review
2003 2dr Coupe 280-horsepower 3.5L V6
5-speed shiftable automatic RWD		 Freeway or city driving, AC or no AC, always average out to be around 20-21. No more no less. see full Infiniti G review
2003 2dr Coupe 280-horsepower 3.5L V6
6-speed manual RWD		 Horrible fuel milage. Seems like they under-rated the horsepower and over rated the fuel economy. see full Infiniti G review
 

2003 Infiniti G Gas Mileage (g/100m)

Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the Infiniti G's real-world g/100m based on how and where you drive a car.