Compact Cars
The title for most fuel efficient Infiniti in the compact cars class in 2003 goes to the Infiniti G35 with a combined EPA fuel economy rating of 22 miles per gallon. This MPG rating is a full 10% better than the worst in class Infiniti, the M45.
- Infiniti G35
- 22 MPG (Manual - 3.5L - 6 Cylinder)
- Infiniti M45
- 20 MPG (Automatic - 4.5L - 8 Cylinder)
Large Cars
The title for most fuel efficient Infiniti in the large cars class in 2003 goes to the Infiniti Q45 with a combined EPA fuel economy rating of 20 miles per gallon. Though this is guaranteed, as it is the only vehicle in this category.
- Infiniti Q45
- 20 MPG (Automatic - 4.5L - 8 Cylinder)
Midsize Cars
The title for most fuel efficient Infiniti in the midsize cars class in 2003 goes to the Infiniti I35 with a combined EPA fuel economy rating of 22 miles per gallon. Though this is guaranteed, as it is the only vehicle in this category.
- Infiniti I35
- 22 MPG (Automatic - 3.5L - 6 Cylinder)
Special Purpose Vehicles - Sport Utility Vehicles 2WD
The title for most fuel efficient Infiniti in the special purpose vehicles - sport utility vehicles 2wd class in 2003 goes to the Infiniti FX35 2WD with a combined EPA fuel economy rating of 19 miles per gallon. This MPG rating is a full 6% better than the worst in class Infiniti, the QX4 2WD.
- Infiniti FX35 2WD
- 19 MPG (Automatic - 3.5L - 6 Cylinder)
- Infiniti QX4 2WD
- 18 MPG (Automatic - 3.5L - 6 Cylinder)
Special Purpose Vehicles - Sport Utility Vehicles 4WD
The title for most fuel efficient Infiniti in the special purpose vehicles - sport utility vehicles 4wd class in 2003 goes to the Infiniti FX35 AWD with a combined EPA fuel economy rating of 18 miles per gallon. This MPG rating is a full 13% better than the worst in class Infiniti, the FX45 AWD.
- Infiniti FX35 AWD
- 18 MPG (Automatic - 3.5L - 6 Cylinder)
- Infiniti QX4 4WD
- 17 MPG (Automatic - 3.5L - 6 Cylinder)
- Infiniti FX45 AWD
- 16 MPG (Automatic - 4.5L - 8 Cylinder)