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Infiniti G Fuel Economy Data

2dr Coupe 280-hp 3.5L V6 6-sp manual RWD

flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
flat med hvy 20 30 20 30 75 18.000
flat med light 25 50 15 10 68 15.700
flat med light 5 45 25 25 81 11.800
hills med hvy 0 0 30 70 70 24.000
flat lead light 5 15 40 40 75 21.000

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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 (MPG)

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 MPG based on how and where you drive a car.