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2004 Oldsmobile Alero GLS
Shown: 2004 Oldsmobile Alero GLS. Photo: Cutlass, CC0, via Wikimedia Commons
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  • MY2000–2004

Oldsmobile Alero MPG & Fuel Cost by Year

5 model years · 2000–2004

27 MPG
Combined
23 MPG
City
33 MPG
Highway
Annual cost · MY2004 Alero 2.2L 4-cyl FWD
$2,420

15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)

All Oldsmobile models

Oldsmobile Alero fuel economy at a glance

EPA has rated the Oldsmobile Alero for 5 model years, 2000 to 2004. Across those years its combined rating runs 21–27 MPG. The latest model year, 2004, has 3 configurations rated 21–27 MPG combined and costing $2,420–$3,110 a year to fuel at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient configuration on record since 2000 is the 2004 Alero 2.2L 4-cyl FWD, at 27 MPG. EPA ratings go back to 1984: the earliest rating on this page is 23 MPG in 1999.

Oldsmobile Alero MPG by year

2022242628 20002004 Gas 2022242628 20002004 Gas
Combined MPG: the line is the most efficient configuration, the shaded band reaches down to the least efficient. Dotted lines mark new generations.
Oldsmobile Alero: combined fuel economy and annual fuel cost for each model year, grouped by generation
Year Gas (MPG) $/yr
2000-2004 (1999) Generation page
2004 21–27 $2,420–$3,110
2003 21–25 $2,610–$3,110
2002 21–25 $2,610–$3,110
2001 22–23 $2,840–$2,970
2000 21–23 $2,840–$3,110

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.

Oldsmobile Alero generations

1 generations between 2000 and 2004. Open one for the table of every model year and configuration.

2004 Oldsmobile Alero GLS

2000-2004 Oldsmobile Alero (1999)

21–27 MPG · $2,420–$3,110/yr

2004 powertrain options

Gas · 2.2L, 3.4L
Combined
21–27 MPG
Per year
$2,420–$3,110
See gas configurations

Oldsmobile Alero MPG history, 1999–1999

Oldsmobile Alero: combined MPG range by model year, 1999–1999
YearGas (MPG)
1999 20–23

EPA re-estimated the ratings of pre-2008 vehicles under its 2008 method; these are the re-estimated values.

EPA ratings: fueleconomy.gov file of Sep 29, 2026 · regular gasoline $4.36/gal (U.S. average, Sep 2026) · 15,000 mi/yr, 55% city / 45% highway · How we calculate

Frequently asked questions

What is the Oldsmobile Alero's gas mileage by year?

EPA combined ratings for the Oldsmobile Alero run 21–27 MPG across model years 2000 to 2004. The latest year, 2004, is rated 21–27 MPG.

Which Oldsmobile Alero model year has the best gas mileage?

The 2004 Oldsmobile Alero Alero 2.2L 4-cyl FWD has the highest combined rating since 2000, at 27 MPG.

How much does a Oldsmobile Alero cost to fuel per year?

For MY2004, EPA-rated configurations cost $2,420–$3,110 a year to fuel, driving 15,000 miles at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient one costs $2,420.

Has the Oldsmobile Alero's fuel economy improved over time?

Yes. The most efficient configuration moved from 23 MPG in 2000 to 27 MPG in 2004, 4 MPG more. Going back further, the best rating in 1984 was 23 MPG.