1988 Porsche 928 S4Fuel Economy & MPG Ratings
Gasoline Minicompact CarsRear-Wheel Drive
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City
15
MPG
Highway
20
MPG
Combined
16
MPG
Real-World MPG
Based on 1 owner report via EPA fueleconomy.gov
17.8MPG average+11.4% vs EPA label
EPA combined: 16 MPG · Owner reported avg: 17.8 MPG
Driving mix: City 20% / Highway 80%
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 17.8 real world MPG based on 1 owner report. EPA combined rating is 16 MPG.
Trim Comparison
Automatic 4-spd
Premium
City
15
Hwy
20
Comb
16
Fuel cost: $5,100/yr
Manual 5-spd
Premium
City
14
Hwy
21
Comb
16
Fuel cost: $5,100/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic 4-spd | Premium | 15 | 20 | 16 | $5,100 |
| Manual 5-spd | Premium | 14 | 21 | 16 | $5,100 |
Annual Fuel Cost
$5,100
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$-13,500
vs. average new vehicle
EPA Fuel Economy Score: -1/10
GHG Score: -1/10
Environment
- CO₂ Tailpipe Emissions
- 555 g/mile
- Annual Petroleum Consumption
- 18.6 barrels
Specifications
- Engine
- 5L 8-cyl
- Transmission
- 4-speed Automatic
- Drivetrain
- RWD
- 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
- 5L, 8-cylinder
- Induction Type
- Gas Guzzler, Port Fuel Injection
- Fuel Type
- Premium Gasoline
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
National AvgEPA default
$4.490/gal$4,209/yr
California
$5.957/gal$5,585/yr
Texas
$3.888/gal$3,645/yr
Florida
$4.136/gal$3,878/yr
New York
$4.522/gal$4,239/yr
Ohio
$4.510/gal$4,228/yr
Washington
$5.591/gal$5,242/yr
Colorado
$4.618/gal$4,329/yr
Minnesota
$4.344/gal$4,073/yr
Massachusetts
$4.448/gal$4,170/yr
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $4,209/yr | — |
| California | $5.957/gal | $5,585/yrHIGHEST | +$1,376 |
| Texas | $3.888/gal | $3,645/yrLOWEST | $-564 |
| Florida | $4.136/gal | $3,878/yr | $-331 |
| New York | $4.522/gal | $4,239/yr | +$30 |
| Ohio | $4.510/gal | $4,228/yr | +$19 |
| Washington | $5.591/gal | $5,242/yr | +$1,033 |
| Colorado | $4.618/gal | $4,329/yr | +$120 |
| Minnesota | $4.344/gal | $4,073/yr | $-136 |
| Massachusetts | $4.448/gal | $4,170/yr | $-39 |
Calculated at 15,000 miles/year (EPA standard assumption) using 16 MPG combined. Regular gasoline prices. Actual costs vary.
Related
Porsche 928 S4 MPG History
See how this model's fuel economy changed by year