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Mazda6

Photo: Mazda6 by Vauxford, CC BY-SA 4.0, via Wikimedia Commons. It shows the model, not always this exact version.

Mazda · model year 2004

2004 Mazda 6

Midsize · Front-Wheel Drive · Gas · EPA class: Midsize Cars

EPA figures · 2004fueleconomy.gov
22MPG combined
20/26MPG city / highway
$3,050fuel a year
404 g CO₂ per mile 2.3 L 4-cyl Automatic (S4)
This car on fueleconomy.gov, read 2 October 2026. Your own figures depend on how and where you drive.

Where it places

The CarCody take

The 2004 Mazda 6 is a gasoline car with front-wheel drive and a 2.3 L 4-cyl engine. Its automatic transmission is listed as S4, and the EPA class is Midsize Cars. Official fuel economy is 20 MPG in city driving and 26 MPG on the highway, for 22 MPG combined. The EPA annual fuel cost is $3050, and tailpipe CO2 emissions are 403.95 g per mile. Buyers comparing cars can use these figures to consider the 6's fuel economy across city and highway driving, as well as its combined rating, annual fuel cost and emissions. The model year, engine, drivetrain and transmission describe this specific 2004 configuration. The three MPG ratings offer separate measures for different driving conditions rather than a single number.

Good to know

  • 26 MPG highway
  • 22 MPG combined
  • Front-wheel drive
  • Automatic (S4) transmission

Watch for

  • 20 MPG city
  • Annual fuel cost: $3050
  • Tailpipe CO2: 403.95 g per mile

Who it suits. This may suit buyers considering a midsize gasoline car with front-wheel drive and an automatic transmission. The listed fuel economy and annual fuel cost support comparisons focused on running costs.

The 2004 Mazda 6 combines a 2.3 L 4-cyl engine with front-wheel drive and an automatic (S4) transmission. Its official combined rating is 22 MPG, and its EPA annual fuel cost is $3050.

Overview

The 2004 Mazda 6 is a midsize gasoline car with front-wheel drive, a 2.3-liter four-cylinder engine and an automatic S4 transmission. Its EPA fuel economy is 20 mpg in city driving and 26 mpg on the highway, for 22 mpg combined. The listed annual fuel cost is $3,050, and tailpipe emissions are 403.95 grams of CO2 per mile.

These figures provide a practical basis for comparing fuel use among cars. The combined rating summarizes city and highway efficiency, while the separate ratings help put the estimate in context for driving that is predominantly urban or highway. Actual fuel use and cost will depend on driving and fuel prices.

Key features

Powertrain and configuration

  • 2.3-liter four-cylinder gasoline engine
  • Automatic (S4) transmission
  • Front-wheel drive
  • Midsize Cars EPA class

EPA efficiency and emissions

The official ratings are 20 mpg city, 26 mpg highway and 22 mpg combined. The EPA annual fuel cost figure is $3,050. Tailpipe CO2 is listed at 403.95 grams per mile. Together, these metrics describe the car's reported fuel economy, estimated annual fuel expense and per-mile tailpipe emissions.

Who it's for

The 2004 Mazda 6 may suit buyers considering a midsize gasoline car with front-wheel drive and an automatic transmission. Its EPA figures are especially useful to shoppers who want to weigh city and highway fuel consumption separately, or include the annual fuel-cost estimate and tailpipe emissions in their comparison. Buyers focused on fuel economy should note the 22 mpg combined rating.

Pros and cons

Pros

  • Separate EPA city and highway ratings make it possible to compare the estimates with a buyer's driving mix.
  • The listed combined rating, annual fuel cost and tailpipe CO2 figure offer several ways to assess operating impact.
  • Its powertrain and drivetrain are clearly specified: a 2.3-liter four-cylinder, automatic S4 and front-wheel drive.

Cons

  • The EPA combined rating is 22 mpg, with a lower 20 mpg city rating.
  • The stated annual fuel cost is $3,050, a figure buyers may want to consider alongside their own driving and fuel costs.
  • The available specifications do not provide details beyond the listed engine, transmission, drive type and efficiency figures.

Alternatives

For other Mazda options, see the Mazda cars list. Newer Mazda models in the directory include the 2026 Mazda 3 4-Door 2WD, the 2026 Mazda 3 4-Door 4WD, the 2026 Mazda 3 5-Door 2WD, the 2026 Mazda 3 5-Door 4WD and the 2026 Mazda CX-30 4WD.

Verdict

The 2004 Mazda 6's central ownership figures are straightforward: 22 mpg combined, a $3,050 EPA annual fuel-cost estimate and 403.95 grams of tailpipe CO2 per mile. Its 20 mpg city and 26 mpg highway ratings, along with its front-wheel-drive gasoline powertrain and automatic S4 transmission, give shoppers a clear starting point for assessing fit and running costs.

Every figure on record

Efficiency
Combined MPG
22 MPG
City MPG
20 MPG
Highway MPG
26 MPG
Running cost
Annual fuel cost
$3,050
Tailpipe CO₂
404 g per mile
The car
Model year
2004
Body
Car
EPA size class
Midsize Cars
Drive
Front-Wheel Drive
Powertrain
Engine
2.3 L 4-cyl
Transmission
Automatic (S4)
Fuel
Gasoline

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