1999 · Midsize Car · Gas
1999 Buick Riviera MPG & fuel economy
The 1999 Buick Riviera is a midsize car with one EPA-rated configuration. The most efficient version returns 19 MPG combined (16 city / 25 highway) on premium gasoline. Efficiency is unchanged from the 1998 model. Among 44 midsize cars rated for 1999, it ranks 29th for lowest fuel cost. At 15,000 miles a year with $3.95/gal premium gas, it costs about $3,118 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 1999 Buick Riviera's fuel average is 8.1 km/L (12.4 L/100 km), or 19 MPG combined: 6.8 km/L in the city and 10.6 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 16 | 6.8 | 14.7 |
| Highway | 25 | 10.6 | 9.4 |
| Combined | 19 | 8.1 | 12.4 |
How it ranks among 1999 Midsize Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
Riviera MPG across model years
Full history →1 EPA-rated configuration
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| FWD · 3.8L 6-cyl supercharged · 4-speed automatic Riviera |
Gas | 16 MPG | 25 MPG | 19 MPG | — | $3,118 |
Specs (most efficient configuration)
- Fuel
- Premium gasoline
- Engine / motor
- 3.8L 6-cyl supercharged
- Transmission
- 4-speed automatic
- Drivetrain
- FWD
- Passenger volume
- 100 cu ft
- Cargo volume
- 18 cu ft
- Tailpipe CO₂
- 468 g/mi
1999 Buick Riviera vs. rivals
Compare the 1999 Riviera
With any other car from any year, including other Riviera model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 1999 Buick Riviera?
Up to 19 MPG combined (16 city / 25 highway).
What fuel does the 1999 Buick Riviera use?
Premium gasoline (premium is required or recommended by the manufacturer).
What is the fuel average in km/L for the 1999 Buick Riviera?
The 1999 Buick Riviera's fuel average is 8.1 km/L (12.4 L/100 km), or 19 MPG combined: 6.8 km/L in the city and 10.6 km/L on the highway.
How much does it cost to fuel the 1999 Buick Riviera per year?
About $3,118 at 15,000 miles a year with $3.95/gal premium gas, or $20.79 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.