| 1 | 0 | 3 | 4 | 3 | 4 |
Infiniti M Fuel Economy Data
4dr Sedan 340-hp 4.5L V8 5-sp shiftable automatic 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 | none | 5 | 20 | 25 | 50 | 85 | 19.200 | |
| flat | med | light | 5 | 70 | 0 | 25 | 80 | 20.000 | |
| hills | lead | none | 15 | 80 | 5 | 0 | N/A | 14.500 | |
| flat | med | light | 5 | 30 | 25 | 40 | 80 | 19.200 | |
| flat | med | light | 15 | 10 | 25 | 50 | 60 | 18.000 | |
| flat | lead | none | 5 | 15 | 20 | 60 | 75 | 18.200 | |
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| flat | med | hvy | 64 | 11 | 4 | 21 | 65 | 21.500 | |
| flat | light | hvy | 0 | 50 | 30 | 20 | 62 | 17.000 | |
| flat | med | light | 5 | 15 | 20 | 60 | 75 | 18.300 | |
What Our Members Are Saying about the Real Gas Mileage of the 2003 Infiniti M
5-speed shiftable automatic RWD
2003 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.