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Infiniti M 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 M's real-world MPG based on how and where you drive a car.

Infiniti M Gas Mileage (MPG):

Reported MPG

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Infiniti M Gas Mileage

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
2013 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
hills light light 8 31 38 23 65 22.0
  hills light light 15 20 20 45 70 23.5
2013 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
hills light light 12 26 29 34 68 22.8  
  Averages hills light light 12 26 29 34 68 22.8
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and all-wheel drive, 2013 Infiniti M fuel economy has been averaging 22.8 MPG (miles per gallon).

The 2013 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 68 miles per hour (about 34 percent of the miles driven). The rest of the miles were in the suburbs (29 percent), in the city (26 percent), and in heavy traffic (12 percent).

In addition the average 2013 Infiniti M in this analysis was driven on hilly terrain with a light foot and the AC on only some of the time.
 
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
2012 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat med light 5 10 15 70 80 23.0
  flat med light 5 10 15 70 80 22.9
  flat med light 5 10 15 70 80 24.2
  flat light light 0 50 50 0 N/A 19.0
  flat light none 0 33 67 0 N/A 16.5
2012 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat med light 3 23 32 42 80 21.1  
  Averages flat med light 3 23 32 42 80 21.1
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and all-wheel drive, the 2012 Infiniti M has been averaging 21.1 MPG (miles per gallon).

The 2012 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 80 miles per hour (about 42 percent of the miles driven). The rest of the miles were in the suburbs (32 percent), in the city (23 percent), and in heavy traffic (3 percent).

In addition the average 2012 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
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
2012 4dr Sedan 302-horsepower 3.5L V6 Hybrid
7-speed shiftable automatic RWD
flat light hvy 0 50 20 30 80 22.1
2012 4dr Sedan 302-horsepower 3.5L V6 Hybrid
7-speed shiftable automatic RWD
flat light hvy 0 50 20 30 80 22.1  
  Averages flat light hvy 0 50 20 30 80 22.1
With the 302-horsepower 3.5L V6 Hybrid engine, 7-speed shiftable automatic transmission, and rear-wheel drive, 2012 Infiniti M gas mileage has been averaging 22.1 MPG (miles per gallon).

The 2012 Infiniti Ms in this analysis were driven mostly in the city (about 50 percent of the miles driven). The rest of the miles were on the highway at an average speed of 80 miles per hour (30 percent), in the suburbs (20 percent), and in heavy traffic (0 percent).

In addition the average 2012 Infiniti M in this analysis was driven on flat terrain with a light foot and the AC on most or all of the time.
 
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
2011 4dr Sedan 420-horsepower 5.6L V8
7-speed shiftable automatic RWD
flat med light 35 35 5 25 75 19.3
  flat med hvy 35 35 5 25 75 19.2
2011 4dr Sedan 420-horsepower 5.6L V8
7-speed shiftable automatic RWD
flat med hvy 35 35 5 25 75 19.3  
  Averages flat med hvy 35 35 5 25 75 19.3
With the 420-horsepower 5.6L V8 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, 2011 Infiniti M fuel economy has been averaging 19.3 MPG (miles per gallon).

The 2011 Infiniti Ms in this analysis were driven mostly in heavy traffic (about 35 percent of the miles driven). The rest of the miles were in the city (35 percent), on the highway at an average speed of 75 miles per hour (25 percent), and in the suburbs (5 percent).

In addition the average 2011 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on most or all of the time.
 
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
2011 4dr Sedan 420-horsepower 5.6L V8
7-speed shiftable automatic AWD
flat light none 5 0 15 80 60 19.8
  flat med light 10 15 50 25 70 19.0
  flat med hvy 5 79 11 5 70 16.5
2011 4dr Sedan 420-horsepower 5.6L V8
7-speed shiftable automatic AWD
flat med light 7 31 25 37 67 18.4  
  Averages flat med light 7 31 25 37 67 18.4
With the 420-horsepower 5.6L V8 engine, 7-speed shiftable automatic transmission, and all-wheel drive, the 2011 Infiniti M has been averaging 18.4 MPG (miles per gallon).

The 2011 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 67 miles per hour (about 37 percent of the miles driven). The rest of the miles were in the city (31 percent), in the suburbs (25 percent), and in heavy traffic (7 percent).

In addition the average 2011 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
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
2011 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 5 45 10 40 60 21.0
2011 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 5 45 10 40 60 21.0  
  Averages flat med light 5 45 10 40 60 21.0
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, 2011 Infiniti M gas mileage has been averaging 21.0 MPG (miles per gallon).

The 2011 Infiniti Ms in this analysis were driven mostly in the city (about 45 percent of the miles driven). The rest of the miles were on the highway at an average speed of 60 miles per hour (40 percent), in the suburbs (10 percent), and in heavy traffic (5 percent).

In addition the average 2011 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
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
2011 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat med light 11 44 33 11 75 19.5
  flat med light 10 25 50 15 70 20.0
  hills med light 5 2 43 50 65 22.0
  flat light none 0 50 0 50 60 16.0
  flat med light 0 0 25 75 80 22.3
2011 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat med light 5 24 30 40 70 20.0  
  Averages flat med light 5 24 30 40 70 20.0
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and all-wheel drive, 2011 Infiniti M fuel economy has been averaging 20.0 MPG (miles per gallon).

The 2011 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 70 miles per hour (about 40 percent of the miles driven). The rest of the miles were in the suburbs (30 percent), in the city (24 percent), and in heavy traffic (5 percent).

In addition the average 2011 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
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
2010 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic AWD
flat med none 10 10 40 40 75 14.0
2010 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic AWD
flat med none 10 10 40 40 75 14.0  
  Averages flat med none 10 10 40 40 75 14.0
With the 420-horsepower 5.6L V8 engine, 7-speed shiftable automatic transmission, and all-wheel drive, the 2010 Infiniti M has been averaging 14.0 MPG (miles per gallon).

The 2010 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 75 miles per hour (about 40 percent of the miles driven). The rest of the miles were in the suburbs (40 percent), in heavy traffic (10 percent), and in the city (10 percent).

In addition the average 2010 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC not used at all.
 
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
2010 4dr Sedan 303-horsepower 3.5L V6
7-speed shiftable automatic RWD
flat light hvy 0 3 12 85 70 22.0
2010 4dr Sedan 303-horsepower 3.5L V6
7-speed shiftable automatic RWD
flat light hvy 0 3 12 85 70 22.0  
  Averages flat light hvy 0 3 12 85 70 22.0
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, 2010 Infiniti M gas mileage has been averaging 22.0 MPG (miles per gallon).

The 2010 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 70 miles per hour (about 85 percent of the miles driven). The rest of the miles were in the suburbs (12 percent), in the city (3 percent), and in heavy traffic (0 percent).

In addition the average 2010 Infiniti M in this analysis was driven on flat terrain with a light foot and the AC on most or all of the time.
 
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 325-horsepower 4.5L V8
5-speed shiftable automatic AWD
flat med none 0 0 0 100 75 15.0
  flat med hvy 10 30 30 30 65 16.0
  flat med hvy 10 30 30 30 65 16.5
  flat med none 22 22 25 31 65 17.0
  flat med hvy 10 30 30 30 65 16.5
2009 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic AWD
flat med light 10 22 23 44 67 16.2  
  Averages flat med light 10 22 23 44 67 16.2
With the 420-horsepower 5.6L V8 engine, 7-speed shiftable automatic transmission, and all-wheel drive, 2009 Infiniti M fuel economy has been averaging 16.2 MPG (miles per gallon).

The 2009 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 67 miles per hour (about 44 percent of the miles driven). The rest of the miles were in the suburbs (23 percent), in the city (22 percent), and in heavy traffic (10 percent).

In addition the average 2009 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
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 303-horsepower 3.5L V6
7-speed shiftable automatic RWD
flat med light 0 0 80 20 60 22.0
2009 4dr Sedan 303-horsepower 3.5L V6
7-speed shiftable automatic RWD
flat med light 0 0 80 20 60 22.0  
  Averages flat med light 0 0 80 20 60 22.0
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, the 2009 Infiniti M has been averaging 22.0 MPG (miles per gallon).

The 2009 Infiniti Ms in this analysis were driven mostly in the suburbs (about 80 percent of the miles driven). The rest of the miles were on the highway at an average speed of 60 miles per hour (20 percent), in heavy traffic (0 percent), and in the city (0 percent).

In addition the average 2009 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
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 303-horsepower 3.5L V6
5-speed shiftable automatic AWD
hills med light 20 40 10 30 65 21.0
2009 4dr Sedan 303-horsepower 3.5L V6
5-speed shiftable automatic AWD
hills med light 20 40 10 30 65 21.0  
  Averages hills med light 20 40 10 30 65 21.0
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and all-wheel drive, 2009 Infiniti M gas mileage has been averaging 21.0 MPG (miles per gallon).

The 2009 Infiniti Ms in this analysis were driven mostly in the city (about 40 percent of the miles driven). The rest of the miles were on the highway at an average speed of 65 miles per hour (30 percent), in heavy traffic (20 percent), and in the suburbs (10 percent).

In addition the average 2009 Infiniti M in this analysis was driven on hilly terrain with a medium foot and the AC on only some of the time.
 
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
2008 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic RWD
flat lead hvy 35 15 5 45 75 17.0
2008 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic RWD
flat lead hvy 35 15 5 45 75 17.0  
  Averages flat lead hvy 35 15 5 45 75 17.0
With the 420-horsepower 5.6L V8 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, 2008 Infiniti M fuel economy has been averaging 17.0 MPG (miles per gallon).

The 2008 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 75 miles per hour (about 45 percent of the miles driven). The rest of the miles were in heavy traffic (35 percent), in the city (15 percent), and in the suburbs (5 percent).

In addition the average 2008 Infiniti M in this analysis was driven on flat terrain with a lead foot and the AC on most or all of the time.
 
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
2008 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med none 60 10 20 10 70 20.0
  hills med light 26 21 25 28 60 19.0
  flat med light 5 20 45 30 75 19.5
  flat med hvy 0 0 0 100 75 21.0
  flat med hvy 2 8 25 65 75 18.0
2008 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 19 12 23 47 71 19.5  
  Averages flat med light 19 12 23 47 71 19.5
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, the 2008 Infiniti M has been averaging 19.5 MPG (miles per gallon).

The 2008 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 71 miles per hour (about 47 percent of the miles driven). The rest of the miles were in the suburbs (23 percent), in heavy traffic (19 percent), and in the city (12 percent).

In addition the average 2008 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
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
2008 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat med light 5 5 0 90 80 22.0
  flat light hvy 25 5 25 45 60 16.5
  hills light none 5 20 25 50 60 19.7
  mtns med none 1 0 3 96 70 22.0
  flat med none 10 20 20 50 70 20.0
2008 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic AWD
hills med light 9 10 15 66 68 20.0  
  Averages hills med light 9 10 15 66 68 20.0
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and all-wheel drive, 2008 Infiniti M gas mileage has been averaging 20.0 MPG (miles per gallon).

The 2008 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 68 miles per hour (about 66 percent of the miles driven). The rest of the miles were in the suburbs (15 percent), in the city (10 percent), and in heavy traffic (9 percent).

In addition the average 2008 Infiniti M in this analysis was driven on hilly terrain with a medium foot and the AC on only some of the time.
 
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
2007 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic RWD
hills med light 0 93 5 2 75 12.9
  flat med hvy 10 60 10 20 70 18.5
  flat light light 0 15 45 40 65 16.9
  flat med hvy 10 0 40 50 60 18.1
2007 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic RWD
flat med hvy 5 42 25 28 68 16.6  
  Averages flat med hvy 5 42 25 28 68 16.6
With the 420-horsepower 5.6L V8 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, 2007 Infiniti M fuel economy has been averaging 16.6 MPG (miles per gallon).

The 2007 Infiniti Ms in this analysis were driven mostly in the city (about 42 percent of the miles driven). The rest of the miles were on the highway at an average speed of 68 miles per hour (28 percent), in the suburbs (25 percent), and in heavy traffic (5 percent).

In addition the average 2007 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on most or all of the time.
 
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
2007 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med hvy 20 20 20 40 75 20.2
  flat med light 10 50 20 20 75 18.4
  flat light light 23 23 25 29 60 16.2
  flat light none 23 24 25 29 65 20.6
  flat light light 23 23 25 29 80 23.5
2007 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat light light 20 28 23 29 71 19.8  
  Averages flat light light 20 28 23 29 71 19.8
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, the 2007 Infiniti M has been averaging 19.8 MPG (miles per gallon).

The 2007 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 71 miles per hour (about 29 percent of the miles driven). The rest of the miles were in the city (28 percent), in the suburbs (23 percent), and in heavy traffic (20 percent).

In addition the average 2007 Infiniti M in this analysis was driven on flat terrain with a light foot and the AC on only some of the time.
 
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
2007 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat light light 0 10 70 20 75 17.4
  flat med light 0 15 28 57 65 19.2
  flat med none 5 5 60 30 60 19.0
  flat med none 0 33 33 33 70 21.9
  flat light none 5 5 60 30 60 20.9
2007 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat med none 2 14 50 34 66 19.7  
  Averages flat med none 2 14 50 34 66 19.7
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and all-wheel drive, 2007 Infiniti M gas mileage has been averaging 19.7 MPG (miles per gallon).

The 2007 Infiniti Ms in this analysis were driven mostly in the suburbs (about 50 percent of the miles driven). The rest of the miles were on the highway at an average speed of 66 miles per hour (34 percent), in the city (14 percent), and in heavy traffic (2 percent).

In addition the average 2007 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC not used at all.
 
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
2006 4dr Sedan 335-horsepower 4.5L V8
5-speed shiftable automatic RWD
hills light hvy 0 10 10 80 75 19.2
  flat light light 11 28 17 44 60 19.9
  flat light none 5 5 0 90 75 21.0
  flat med hvy 10 10 45 35 80 18.9
  flat light hvy 25 13 13 50 75 17.6
2006 4dr Sedan 335-horsepower 4.5L V8
5-speed shiftable automatic RWD
flat light light 10 13 17 60 73 19.3  
  Averages flat light light 10 13 17 60 73 19.3
With the 420-horsepower 5.6L V8 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, 2006 Infiniti M fuel economy has been averaging 19.3 MPG (miles per gallon).

The 2006 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 73 miles per hour (about 60 percent of the miles driven). The rest of the miles were in the suburbs (17 percent), in the city (13 percent), and in heavy traffic (10 percent).

In addition the average 2006 Infiniti M in this analysis was driven on flat terrain with a light foot and the AC on only some of the time.
 
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
2006 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat lead hvy 5 60 10 25 80 17.7
  flat lead none 2 3 75 20 80 17.4
  flat med light 0 14 29 57 60 20.5
  hills med light 5 50 25 20 70 19.2
  flat light hvy 0 40 10 50 70 22.5
2006 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 2 33 30 34 72 19.5  
  Averages flat med light 2 33 30 34 72 19.5
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, the 2006 Infiniti M has been averaging 19.5 MPG (miles per gallon).

The 2006 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 72 miles per hour (about 34 percent of the miles driven). The rest of the miles were in the city (33 percent), in the suburbs (30 percent), and in heavy traffic (2 percent).

In addition the average 2006 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
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
2006 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat med light 0 0 18 82 65 19.4
  flat light light 0 5 35 60 80 21.5
  flat med light 0 0 19 81 70 18.2
  flat light light 5 14 52 29 60 22.4
  flat med light 0 0 25 75 65 18.9
2006 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat med light 1 4 30 65 68 20.1  
  Averages flat med light 1 4 30 65 68 20.1
With the 330-horsepower 3.7L V6 engine, 7-speed shiftable automatic transmission, and all-wheel drive, 2006 Infiniti M gas mileage has been averaging 20.1 MPG (miles per gallon).

The 2006 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 68 miles per hour (about 65 percent of the miles driven). The rest of the miles were in the suburbs (30 percent), in the city (4 percent), and in heavy traffic (1 percent).

In addition the average 2006 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
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
2004 4dr Sedan 340-horsepower 4.5L V8
5-speed shiftable automatic RWD
flat light light 20 10 40 30 80 19.5
  hills lead light 5 5 50 40 75 20.2
2004 4dr Sedan 340-horsepower 4.5L V8
5-speed shiftable automatic RWD
hills med light 13 8 45 35 78 19.9  
  Averages hills med light 13 8 45 35 78 19.9
With the 420-horsepower 5.6L V8 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, 2004 Infiniti M fuel economy has been averaging 19.9 MPG (miles per gallon).

The 2004 Infiniti Ms in this analysis were driven mostly in the suburbs (about 45 percent of the miles driven). The rest of the miles were on the highway at an average speed of 78 miles per hour (35 percent), in heavy traffic (13 percent), and in the city (8 percent).

In addition the average 2004 Infiniti M in this analysis was driven on hilly terrain with a medium foot and the AC on only some of the time.
 
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
2003 4dr Sedan 340-horsepower 4.5L V8
5-speed shiftable automatic RWD
flat light hvy 0 50 30 20 62 17.0
  flat med hvy 64 11 4 21 65 21.5
  flat med light 5 15 20 60 75 18.3
  flat lead none 5 15 20 60 75 18.2
  flat med light 15 10 25 50 60 18.0
2003 4dr Sedan 340-horsepower 4.5L V8
5-speed shiftable automatic RWD
flat med light 18 20 20 42 67 18.6  
  Averages flat med light 18 20 20 42 67 18.6
With the 420-horsepower 5.6L V8 engine, 7-speed shiftable automatic transmission, and rear-wheel drive, the 2003 Infiniti M has been averaging 18.6 MPG (miles per gallon).

The 2003 Infiniti Ms in this analysis were driven mostly on the highway at an average speed of 67 miles per hour (about 42 percent of the miles driven). The rest of the miles were in the city (20 percent), in the suburbs (20 percent), and in heavy traffic (18 percent).

In addition the average 2003 Infiniti M in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.

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What Our Members Are Saying about the Real Gas Mileage of the 2003 Infiniti M

2003 Infiniti M Real Gas Mileage: Cons
YearBody/PowertrainComment
2003 4dr Sedan 340-horsepower 4.5L V8
5-speed shiftable automatic RWD
Lower than typical ... particularly around town, but not surprising, I suppose.