- Newest year: 2004
- Gas
- Midsize cars
- Same as 2003
2002-2004 Infiniti I35 MPG & Fuel Cost
3 model years · 20 MPG combined
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 5 of 10 midsize car configurations, MY2004. Ranked against all rated configurations, not sales-weighted.
2002-2004 Infiniti I35 at a glance
The 2002-2004 Infiniti I35 covers 3 model years in the EPA database (3 configurations in all), rated 20 MPG combined. The newest model year, 2004, costs about $3,270 a year to fuel for its most efficient version, the I35 3.5L 6-cyl FWD (20 MPG), at regular gasoline $4.36/gal (U.S. average, Sep 2026). EPA lists identical ratings for every model year of this generation.
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
2002-2004 Infiniti I35 by model year
What the 2004 I35 3.5L 6-cyl FWD costs to drive
Per month
$273
$3,270 a year ÷ 12
Per 25 miles
$5.45
Per 100 miles
$21.80
Five years
$16,350
5 × the yearly cost, prices held at today's level
vs the midsize car median
$170less a year
Class median $3,440 a year, MY2004
Based on 15,000 miles a year and regular gasoline $4.36/gal (U.S. average, Sep 2026).
2004 Infiniti I35 MPG
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
EPA lists the same ratings for the 2004 Infiniti I35 as for the 2003 model, so the configurations and costs are the ones in the 2003 section above.See 2003
Gas configurations (1)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| I35 (Most efficient) | 3.5L 6-cyl | FWD | 17 | 24 | 20 | $3,270 |
2003 Infiniti I35 MPG
Same EPA ratings as 2002
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
EPA lists the same ratings for the 2003 Infiniti I35 as for the 2002 model, so the configurations and costs are the ones in the 2002 section above.See 2002
2002 Infiniti I35 MPG
20 MPG · $3,270/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Gas configurations (1)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| I35 (Most efficient) | 3.5L 6-cyl | FWD | 17 | 24 | 20 | $3,270 |
Fuel cost by state
Yearly cost of the I35 3.5L 6-cyl FWD: $4,440 in California and $2,850 in Texas, a $1,590 difference.
- California $4,440
- Washington $4,120
- New York $3,270
- Florida $3,090
- Texas $2,850
Similar cars
Closest combined MPG among MY2004 midsize car models.
Generations
- 2002-2004
Frequently asked questions
What gas mileage does the 2002-2004 Infiniti I35 get?
EPA rates the 2002-2004 Infiniti I35 at 20 MPG combined across 3 configurations and 3 model years. The most efficient version, the 2004 I35 3.5L 6-cyl FWD, is rated 20 MPG (17 city, 24 highway).
Which years had the best MPG in the 2002-2004 Infiniti I35?
Every model year of the 2002-2004 Infiniti I35 tops out at 20 MPG combined, so no year is better than another.
Did EPA ratings change during the 2002-2004 Infiniti I35?
No. EPA lists the same ratings for every model year from 2002 to 2004.
How much does it cost to fuel a 2004 Infiniti I35 per year?
Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the I35 3.5L 6-cyl FWD costs about $3,270 a year. Across all 1 configuration the cost runs $3,270 a year.
How much does it cost to drive a 2004 Infiniti I35 100 miles?
About $21.80 per 100 miles for the I35 3.5L 6-cyl FWD at regular gasoline $4.36/gal (U.S. average, Sep 2026). That is the annual cost over 15,000 miles divided by 150.
Is the 2004 Infiniti I35 more efficient in the city or on the highway?
The I35 3.5L 6-cyl FWD is rated 17 city and 24 highway MPG, so it is more efficient on the highway, by 7 MPG.
How does the 2004 Infiniti I35 compare with other midsize car configurations?
The I35 3.5L 6-cyl FWD costs about $3,270 a year to fuel, $170 less than the class median of $3,440, and less than 5 of 10 midsize car configurations. The comparison covers all 119 rated midsize car configurations for MY2004, not weighted by sales.
Is the 2004 Infiniti I35 different from the 2003 model?
No. EPA lists the same ratings for 2003 and 2004: 1 configuration rated 20 MPG combined. See the 2003 Infiniti I35 for that year.