1987 Buick RivieraFuel Economy & MPG Ratings
Photo: Jukka Peura from Pori, Suomi,cropped and altered by uploader Mr.choppers. CC BY 2.0. via Wikimedia Commons
Real-World MPG
Based on 1 owner report via EPA fueleconomy.gov
Driving mix: City -1% / Highway -1%
Source: EPA fueleconomy.gov “Your MPG” owner submissions. Real-world results vary by driver behavior, conditions, and equipment.
Owner reported MPG for this vehicle averages 12.8 real world MPG based on 1 owner report. EPA combined rating is 19 MPG.
Trim Comparison
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic 4-spd | Regular | 16 | 25 | 19 | $3,550 |
Based on gasoline at $3.67/gal, 15,000 miles/year
vs. average new vehicle
Environment
- CO₂ Tailpipe Emissions
- 468 g/mile
- Annual Petroleum Consumption
- 15.7 barrels
Specifications
- Engine
- 3.8L 6-cyl
- Transmission
- 4-speed Automatic
- Drivetrain
- FWD
- Body Style
- Sedan
- GVWR
- Class 1 (≤6,000 lbs)
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 3.8L, 6-cylinder
- Induction Type
- Port Fuel Injection
- Fuel Type
- Regular Gasoline
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $3,545/yr | — |
| California | $5.957/gal | $4,703/yrHIGHEST | +$1,158 |
| Texas | $3.888/gal | $3,069/yrLOWEST | $-476 |
| Florida | $4.136/gal | $3,265/yr | $-280 |
| New York | $4.522/gal | $3,570/yr | +$25 |
| Ohio | $4.510/gal | $3,561/yr | +$16 |
| Washington | $5.591/gal | $4,414/yr | +$869 |
| Colorado | $4.618/gal | $3,646/yr | +$101 |
| Minnesota | $4.344/gal | $3,429/yr | $-116 |
| Massachusetts | $4.448/gal | $3,512/yr | $-33 |
Calculated at 15,000 miles/year (EPA standard assumption) using 19 MPG combined. Regular gasoline prices. Actual costs vary.