- Gas
- Midsize cars
- MY2002–2004
Infiniti I35 MPG & Fuel Cost by Year
3 model years · 2002–2004
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Infiniti I35 fuel economy at a glance
EPA has rated the Infiniti I35 for 3 model years, 2002 to 2004. Across those years its combined rating runs 20 MPG. The latest model year, 2004, has 1 configuration rated 20 MPG combined and costing $3,270 a year to fuel at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient configuration on record since 2002 is the 2004 I35 3.5L 6-cyl FWD, at 20 MPG.
Infiniti I35 MPG by year
| Year | Gas (MPG) | $/yr |
|---|---|---|
| 2002-2004 Generation page | ||
| 2004 | 20 | $3,270 |
| 2003 | 20 | $3,270 |
| 2002 | 20 | $3,270 |
Costs use the current EIA price set and 15,000 miles a year for every year, so years are comparable. Green marks the best year for each powertrain.
Infiniti I35 generations
1 generations between 2002 and 2004. Open one for the table of every model year and configuration.
2004 powertrain options
More Infiniti models
Frequently asked questions
What is the Infiniti I35's gas mileage by year?
EPA combined ratings for the Infiniti I35 run 20 MPG across model years 2002 to 2004. The latest year, 2004, is rated 20 MPG.
Which Infiniti I35 model year has the best gas mileage?
The 2004 Infiniti I35 I35 3.5L 6-cyl FWD has the highest combined rating since 2002, at 20 MPG.
How much does a Infiniti I35 cost to fuel per year?
For MY2004, EPA-rated configurations cost $3,270 a year to fuel, driving 15,000 miles at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient one costs $3,270.
Has the Infiniti I35's fuel economy improved over time?
Not much. The most efficient configuration is rated 20 MPG in both 2002 and 2004.
Which Infiniti I35 model years have the same ratings?
EPA lists identical ratings as the previous year for 2003, 2004. The generation pages mark those years "same EPA ratings" and point to the year that holds the full table.