2003 · Midsize Car · Gas
2003 Infiniti I35 MPG & fuel economy
The 2003 Infiniti I35 is a midsize car with one EPA-rated configuration. The most efficient version returns 20 MPG combined (17 city / 24 highway) on regular gasoline. Efficiency is unchanged from the 2002 model. Among 38 midsize cars rated for 2003, it ranks 18th for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $2,325 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2003 Infiniti I35's fuel average is 8.5 km/L (11.8 L/100 km), or 20 MPG combined: 7.2 km/L in the city and 10.2 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 17 | 7.2 | 13.8 |
| Highway | 24 | 10.2 | 9.8 |
| Combined | 20 | 8.5 | 11.8 |
How it ranks among 2003 Midsize Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
I35 MPG across model years
Full history →1 EPA-rated configuration
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| FWD · 3.5L 6-cyl · 4-speed automatic I35 |
Gas | 17 MPG | 24 MPG | 20 MPG | — | $2,325 |
Specs (most efficient configuration)
- Fuel
- Regular gasoline
- Engine / motor
- 3.5L 6-cyl
- Transmission
- 4-speed automatic
- Drivetrain
- FWD
- Passenger volume
- 102 cu ft
- Cargo volume
- 15 cu ft
- Tailpipe CO₂
- 444 g/mi
2003 Infiniti I35 vs. rivals
Compare the 2003 I35
With any other car from any year, including other I35 model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 2003 Infiniti I35?
Up to 20 MPG combined (17 city / 24 highway).
What fuel does the 2003 Infiniti I35 use?
Regular gasoline.
What is the fuel average in km/L for the 2003 Infiniti I35?
The 2003 Infiniti I35's fuel average is 8.5 km/L (11.8 L/100 km), or 20 MPG combined: 7.2 km/L in the city and 10.2 km/L on the highway.
How much does it cost to fuel the 2003 Infiniti I35 per year?
About $2,325 at 15,000 miles a year with $3.10/gal regular gas, or $15.50 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.