2003 · Midsize Car · Gas
2003 Mitsubishi Diamante MPG & fuel economy
The 2003 Mitsubishi Diamante is a midsize car with one EPA-rated configuration. The most efficient version returns 18 MPG combined (16 city / 23 highway) on premium gasoline. Efficiency is unchanged from the 2002 model. Among 38 midsize cars rated for 2003, it ranks 31st for lowest fuel cost. At 15,000 miles a year with $3.95/gal premium gas, it costs about $3,292 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2003 Mitsubishi Diamante's fuel average is 7.7 km/L (13.1 L/100 km), or 18 MPG combined: 6.8 km/L in the city and 9.8 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 16 | 6.8 | 14.7 |
| Highway | 23 | 9.8 | 10.2 |
| Combined | 18 | 7.7 | 13.1 |
How it ranks among 2003 Midsize Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
Diamante 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 Diamante Sedan |
Gas | 16 MPG | 23 MPG | 18 MPG | — | $3,292 |
Specs (most efficient configuration)
- Fuel
- Premium gasoline
- Engine / motor
- 3.5L 6-cyl
- Transmission
- 4-speed automatic
- Drivetrain
- FWD
- Passenger volume
- 96 cu ft
- Cargo volume
- 14 cu ft
- Tailpipe CO₂
- 494 g/mi
2003 Mitsubishi Diamante vs. rivals
Compare the 2003 Diamante
With any other car from any year, including other Diamante model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 2003 Mitsubishi Diamante?
Up to 18 MPG combined (16 city / 23 highway).
What fuel does the 2003 Mitsubishi Diamante use?
Premium gasoline (premium is required or recommended by the manufacturer).
What is the fuel average in km/L for the 2003 Mitsubishi Diamante?
The 2003 Mitsubishi Diamante's fuel average is 7.7 km/L (13.1 L/100 km), or 18 MPG combined: 6.8 km/L in the city and 9.8 km/L on the highway.
How much does it cost to fuel the 2003 Mitsubishi Diamante per year?
About $3,292 at 15,000 miles a year with $3.95/gal premium gas, or $21.94 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.