Photo: Buick Riviera by Jukka Peura from Pori, Suomi,cropped and altered by uploader Mr.choppers, CC BY 2.0, via Wikimedia Commons. It shows the model, not always this exact version.
Buick · model year 1999
1999 Buick Riviera
Midsize · Front-Wheel Drive · Gas · EPA class: Midsize Cars
EPA figures · 1999fueleconomy.gov
19MPG combined
16/25MPG city / highway
$4,350fuel a year
468 g CO₂ per mile 3.8 L 6-cyl supercharged Automatic 4-spd
This car on fueleconomy.gov, read 2 October 2026. Your own figures depend on how and where you drive.
Where it places
Every figure on record
- Combined MPG
- 19 MPG
- City MPG
- 16 MPG
- Highway MPG
- 25 MPG
- Annual fuel cost
- $4,350
- Tailpipe CO₂
- 468 g per mile
- Model year
- 1999
- Body
- Car
- EPA size class
- Midsize Cars
- Drive
- Front-Wheel Drive
- Engine
- 3.8 L 6-cyl supercharged
- Transmission
- Automatic 4-spd
- Fuel
- Gasoline
Efficiency
Running cost
The car
Powertrain
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20 MPG · $3,350 fuel a year
1999 Buick Regal
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21 MPG · $3,200 fuel a year