1988 Cadillac DeVilleFuel Economy & MPG Ratings
Gasoline Large CarsFront-Wheel Drive
City
15
MPG
Highway
22
MPG
Combined
17
MPG
Real-World MPG
Based on 1 owner report via EPA fueleconomy.gov
17.7MPG average+4.1% vs EPA label
EPA combined: 17 MPG · Owner reported avg: 17.7 MPG
Driving mix: City 40% / Highway 60%
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 17.7 real world MPG based on 1 owner report. EPA combined rating is 17 MPG.
Trim Comparison
Automatic 4-spd
Regular
City
15
Hwy
22
Comb
17
Fuel cost: $3,950/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic 4-spd | Regular | 15 | 22 | 17 | $3,950 |
Annual Fuel Cost
$3,950
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$-7,750
vs. average new vehicle
EPA Fuel Economy Score: -1/10
GHG Score: -1/10
Environment
- CO₂ Tailpipe Emissions
- 523 g/mile
- Annual Petroleum Consumption
- 17.5 barrels
Specifications
- Engine
- 4.5L 8-cyl
- Transmission
- 4-speed Automatic
- Drivetrain
- FWD
- Body Style
- Sedan
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 4.5L, 8-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
National AvgEPA default
$4.490/gal$3,962/yr
California
$5.957/gal$5,256/yr
Texas
$3.888/gal$3,431/yr
Florida
$4.136/gal$3,649/yr
New York
$4.522/gal$3,990/yr
Ohio
$4.510/gal$3,979/yr
Washington
$5.591/gal$4,933/yr
Colorado
$4.618/gal$4,075/yr
Minnesota
$4.344/gal$3,833/yr
Massachusetts
$4.448/gal$3,925/yr
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $3,962/yr | — |
| California | $5.957/gal | $5,256/yrHIGHEST | +$1,294 |
| Texas | $3.888/gal | $3,431/yrLOWEST | $-531 |
| Florida | $4.136/gal | $3,649/yr | $-313 |
| New York | $4.522/gal | $3,990/yr | +$28 |
| Ohio | $4.510/gal | $3,979/yr | +$17 |
| Washington | $5.591/gal | $4,933/yr | +$971 |
| Colorado | $4.618/gal | $4,075/yr | +$113 |
| Minnesota | $4.344/gal | $3,833/yr | $-129 |
| Massachusetts | $4.448/gal | $3,925/yr | $-37 |
Calculated at 15,000 miles/year (EPA standard assumption) using 17 MPG combined. Regular gasoline prices. Actual costs vary.
Related
Cadillac DeVille MPG History
See how this model's fuel economy changed by year