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Infiniti G Fuel Economy (MPG)

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Infiniti G Infiniti G 2009 23.2 MPG Highway Percentage 58 percent
Year Body/Powertrain 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
2009 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med hvy 20 40 0 40 75 21.300
  flat med light 10 10 15 65 60 25.783
  flat light hvy 0 75 0 25 65 22.134
  flat med none 5 20 20 55 75 26.000
  flat med none 10 15 10 65 70 21.034
  flat light none 20 10 30 40 60 24.200
  flat light none 50 0 0 50 65 21.600
  flat med hvy 0 0 10 90 75 22.640
  flat med none 0 0 7 93 75 23.680
2009 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 13 19 10 58 69 23.2  
  Averages flat med light 13 19 10 58 69 23.2
With the 328-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, 2009 Infiniti G fuel economy has been averaging 23.2 MPG (miles per gallon).

The 2009 Infiniti Gs in this analysis were driven mostly on the highway at an average speed of 69 miles per hour (about 58 percent of the miles driven). The rest of the miles were in the city (19 percent), in heavy traffic (13 percent), and in the suburbs (10 percent).

In addition the average 2009 Infiniti G in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
Infiniti G Infiniti G 2009 18.6 MPG Highway Percentage 30 percent
Year Body/Powertrain 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
2009 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat lead hvy 10 15 50 25 60 17.800
  flat med hvy 5 5 5 85 60 24.571
  flat med light 0 4 35 61 40 18.649
  flat med light 5 75 5 15 70 19.316
  flat light none 5 10 55 30 65 17.787
  flat med light 5 75 5 15 70 18.649
  hills light none 0 60 30 10 65 16.504
  mtns light none 0 5 10 85 65 28.418
  flat med light 10 15 50 25 60 18.000
  flat light none 9 18 55 18 65 16.059
  mtns light none 0 30 40 30 60 21.400
  flat light none 10 30 40 20 75 17.000
  flat med none 5 15 55 25 60 19.133
  flat med light 5 75 5 15 70 18.387
  flat med light 10 15 50 25 60 17.500
  flat med light 5 75 5 15 70 20.480
  flat med hvy 5 15 55 25 60 16.897
  mtns light none 5 20 30 45 65 20.000
  mtns light none 5 10 35 50 65 20.600
  flat light light 24 25 25 26 60 19.000
  flat lead none 5 90 0 5 65 15.000
  hills light none 0 20 60 20 60 15.329
  hills light none 10 20 50 20 65 15.043
  hills light none 10 40 30 20 65 16.605
  flat light none 5 20 45 30 65 18.036
  flat light none 5 10 55 30 65 16.667
2009 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat med light 6 30 34 30 63 18.6  
  Averages flat med light 6 30 34 30 63 18.6
With the 328-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and all-wheel drive, the 2009 Infiniti G has been averaging 18.6 MPG (miles per gallon).

The 2009 Infiniti Gs in this analysis were driven mostly in the suburbs (about 34 percent of the miles driven). The rest of the miles were on the highway at an average speed of 63 miles per hour (30 percent), in the city (30 percent), and in heavy traffic (6 percent).

In addition the average 2009 Infiniti G in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
Infiniti G Infiniti G 2009 24.5 MPG Highway Percentage 91 percent
Year Body/Powertrain 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
2009 4dr Sedan 328-horsepower 3.7L V6
6-speed manual RWD
flat light light 0 9 0 91 70 24.500
2009 4dr Sedan 328-horsepower 3.7L V6
6-speed manual RWD
flat light light 0 9 0 91 70 24.5  
  Averages flat light light 0 9 0 91 70 24.5
With the 328-horsepower 3.7L V6 engine, 6-speed manual transmission, and rear-wheel drive, 2009 Infiniti G gas mileage has been averaging 24.5 MPG (miles per gallon).

The 2009 Infiniti Gs in this analysis were driven mostly on the highway at an average speed of 70 miles per hour (about 91 percent of the miles driven). The rest of the miles were in the city (9 percent), in heavy traffic (0 percent), and in the suburbs (0 percent).

In addition the average 2009 Infiniti G in this analysis was driven on flat terrain with a light foot and the AC on only some of the time.
 
Infiniti G Infiniti G 2009 20.6 MPG Highway Percentage 33 percent
Year Body/Powertrain 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
2009 2dr Hardtop conv. 325-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 0 50 0 50 75 21.890
  flat lead hvy 25 25 25 25 75 20.000
  flat lead hvy 25 25 25 25 75 20.000
2009 2dr Hardtop conv. 325-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat lead hvy 17 33 17 33 75 20.6  
  Averages flat lead hvy 17 33 17 33 75 20.6
With the 325-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, 2009 Infiniti G fuel economy has been averaging 20.6 MPG (miles per gallon).

The 2009 Infiniti Gs in this analysis were driven mostly in the city (about 33 percent of the miles driven). The rest of the miles were on the highway at an average speed of 75 miles per hour (33 percent), in heavy traffic (17 percent), and in the suburbs (17 percent).

In addition the average 2009 Infiniti G in this analysis was driven on flat terrain with a lead foot and the AC on most or all of the time.
 
Infiniti G Infiniti G 2009 15.0 MPG Highway Percentage 10 percent
Year Body/Powertrain 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
2009 2dr Hardtop conv. 325-horsepower 3.7L V6
6-speed manual RWD
flat lead none 10 10 70 10 70 15.000
2009 2dr Hardtop conv. 325-horsepower 3.7L V6
6-speed manual RWD
flat lead none 10 10 70 10 70 15.0  
  Averages flat lead none 10 10 70 10 70 15.0
With the 325-horsepower 3.7L V6 engine, 6-speed manual transmission, and rear-wheel drive, the 2009 Infiniti G has been averaging 15.0 MPG (miles per gallon).

The 2009 Infiniti Gs in this analysis were driven mostly in the suburbs (about 70 percent of the miles driven). The rest of the miles were in heavy traffic (10 percent), in the city (10 percent), and on the highway at an average speed of 70 miles per hour (10 percent).

In addition the average 2009 Infiniti G in this analysis was driven on flat terrain with a lead foot and the AC not used at all.
 
Infiniti G Infiniti G 2009 19.5 MPG Highway Percentage 58 percent
Year Body/Powertrain 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
2009 2dr Coupe 330-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 20 10 20 50 75 17.200
  flat med none 5 5 20 70 75 20.000
  flat med hvy 16 39 0 45 75 17.600
  flat med none 10 10 20 60 60 22.400
  flat med hvy 10 60 15 15 60 18.000
  flat lead light 0 0 10 90 80 22.000
  flat lead light 0 0 10 90 80 22.000
  flat lead hvy 16 39 0 45 75 17.000
2009 2dr Coupe 330-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 10 20 12 58 73 19.5  
  Averages flat med light 10 20 12 58 73 19.5
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, 2009 Infiniti G gas mileage has been averaging 19.5 MPG (miles per gallon).

The 2009 Infiniti Gs in this analysis were driven mostly on the highway at an average speed of 73 miles per hour (about 58 percent of the miles driven). The rest of the miles were in the city (20 percent), in the suburbs (12 percent), and in heavy traffic (10 percent).

In addition the average 2009 Infiniti G in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
Infiniti G Infiniti G 2009 20.4 MPG Highway Percentage 70 percent
Year Body/Powertrain 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
2009 2dr Coupe 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat light light 10 10 10 70 60 20.000
  flat med hvy 10 10 10 70 60 21.739
  flat light light 10 10 10 70 60 19.500
  flat light light 10 10 10 70 60 19.615
  flat light light 10 10 10 70 70 20.364
  flat med hvy 10 10 10 70 60 20.000
  flat med hvy 10 10 10 70 60 20.636
  flat light light 10 10 10 70 60 21.200
2009 2dr Coupe 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat light light 10 10 10 70 61 20.4  
  Averages flat light light 10 10 10 70 61 20.4
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and all-wheel drive, 2009 Infiniti G fuel economy has been averaging 20.4 MPG (miles per gallon).

The 2009 Infiniti Gs in this analysis were driven mostly on the highway at an average speed of 61 miles per hour (about 70 percent of the miles driven). The rest of the miles were in heavy traffic (10 percent), in the suburbs (10 percent), and in the city (10 percent).

In addition the average 2009 Infiniti G in this analysis was driven on flat terrain with a light foot and the AC on only some of the time.
 
Infiniti G Infiniti G 2009 20.5 MPG Highway Percentage 52 percent
Year Body/Powertrain 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
2009 2dr Coupe 330-horsepower 3.7L V6
6-speed manual RWD
mtns med none 0 30 0 70 75 21.000
  hills light none 0 33 33 33 60 20.000
2009 2dr Coupe 330-horsepower 3.7L V6
6-speed manual RWD
mtns med none 0 32 17 52 68 20.5  
  Averages mtns med none 0 32 17 52 68 20.5
With the 330-horsepower 3.7L V6 engine, 6-speed manual transmission, and rear-wheel drive, the 2009 Infiniti G has been averaging 20.5 MPG (miles per gallon).

The 2009 Infiniti Gs in this analysis were driven mostly on the highway at an average speed of 68 miles per hour (about 52 percent of the miles driven). The rest of the miles were in the city (32 percent), in the suburbs (17 percent), and in heavy traffic (0 percent).

In addition the average 2009 Infiniti G in this analysis was driven on mountainous terrain with a medium foot and the AC not used at all.

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What Our Members Are Saying about the Real Gas Mileage of the 2009 Infiniti G

2009 Infiniti G Real Gas Mileage: Pros
YearBody/PowertrainComment
2009 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic RWD
A downside if you are used to more fuel efficient cars--you pay for performance. NOte that I had a 2005 Chrysler PT Cruiser turbo convertilble (4 cyl.) before I bought the G. It got worse gas mileage.
2009 Infiniti G Real Gas Mileage: Cons
YearBody/PowertrainComment
2010 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic AWD
To be honest, it is exactly what I expected, so no real beefs with it. That said, if you are looking for a car that gets better than 19 or so combined, this is not it. Decent freeway miles (24-27/g) but in city it is hard to beat 16/g.
2010 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic AWD
Fuel economy is poor - about 19 MPG average.
2009 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic AWD
With such a large displaced engine and so much power you will find that you will have so-so mpg if you drive mainly in the city like I do. Especially if you are a "spirited" driver like I tend to be. I am averaging about 14-16mpg 95% city. On the highway its a different story. I have averaged up to 28mpg @ 78mph, I kind of wish I drove more on the highway.
2009 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic RWD
As noted before, the G will get about 18 around town in stop and go, about 27-28 on the highway.
2009 2dr Coupe 330-horsepower 3.7L V6
7-speed shiftable automatic RWD
You do not buy a performance car and expect to get good gas mileage. At a 5 mpg or greater difference from my last car, it is taking some getting used too.
2009 2dr Coupe 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
average 18 in town 24 highway.
2008 4dr Sedan 306-horsepower 3.5L V6
6-speed manual RWD
While not terrible, ~20mpg is by no means phenomenal. Relatively comparable cars get ~23-27mpg, but typically also have smaller engines which explains a good portion of the difference.
2008 4dr Sedan 306-horsepower 3.5L V6
5-speed shiftable automatic AWD
Takes a lot of fuel... 14L/100km about.
2008 4dr Sedan 306-horsepower 3.5L V6
5-speed shiftable automatic RWD
Not too great. My average is 19 - 20 mpg, mostly city.
2008 4dr Sedan 306-horsepower 3.5L V6
5-speed shiftable automatic RWD
burns too much fuel, I would like another 6 mpg even if power were cut
 

2009 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.