- Newest year: 2020
- Gas
- Small cars
2020 Roush Performance Stage 3 Mustang MPG & Fuel Cost
2 configurations · 14–15 MPG combined
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Among the costliest small car configurations to fuel, MY2020. Ranked against all rated configurations, not sales-weighted.
2020 Roush Performance Stage 3 Mustang at a glance
The 2020 Roush Performance Stage 3 Mustang has 2 configurations in the EPA database, rated 14–15 MPG combined. The most efficient is the Stage 3 Mustang 5.0L 8-cyl supercharged RWD at 15 MPG, which costs about $5,260 a year to fuel at premium gasoline $5.36/gal (U.S. average, Sep 2026). Annual fuel cost across the configurations runs from $5,260 to $5,640, a $380 difference. The Stage 3 Mustang 5.0L 8-cyl supercharged RWD is among the costliest small car configurations to fuel for MY2020 (class median $3,230 a year).
What the 2020 Stage 3 Mustang 5.0L 8-cyl supercharged RWD costs to drive
Per month
$438
$5,260 a year ÷ 12
Per 25 miles
$8.77
Per 100 miles
$35.07
Five years
$26,300
5 × the yearly cost, prices held at today's level
vs the small car median
$2,030more a year
Class median $3,230 a year, MY2020
Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).
2020 Roush Performance Stage 3 Mustang MPG
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Stage 3 Mustang 5.0L 8-cyl supercharged RWD Manual 6-spd (Most efficient) | 5.0L 8-cyl supercharged | RWD | 13 | 20 | 15 | $5,260 |
| Stage 3 Mustang 5.0L 8-cyl supercharged RWD Automatic (S10) | 5.0L 8-cyl supercharged | RWD | 12 | 18 | 14 | $5,640 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Fuel cost by state
Yearly cost of the Stage 3 Mustang 5.0L 8-cyl supercharged RWD: $6,270 in California and $4,560 in Texas, a $1,710 difference.
- California $6,270
- Washington $5,900
- New York $5,190
- Florida $4,800
- Texas $4,560
Similar cars
Closest combined MPG among MY2020 small car models.
Generations
- 2020
Frequently asked questions
What gas mileage does the 2020 Roush Performance Stage 3 Mustang get?
EPA rates the 2020 Roush Performance Stage 3 Mustang at 14–15 MPG combined across 2 configurations. The most efficient, the Stage 3 Mustang 5.0L 8-cyl supercharged RWD, is rated 15 MPG combined (13 city / 20 highway).
How much does it cost to fuel a 2020 Roush Performance Stage 3 Mustang per year?
Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the Stage 3 Mustang 5.0L 8-cyl supercharged RWD costs about $5,260 a year. Across all 2 configurations the cost runs $5,260–$5,640 a year. That is a $380 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2020 Roush Performance Stage 3 Mustang 100 miles?
About $35.07 per 100 miles for the Stage 3 Mustang 5.0L 8-cyl supercharged RWD at premium gasoline $5.36/gal (U.S. average, Sep 2026), and between $35.07 and $37.60 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2020 Roush Performance Stage 3 Mustang more efficient in the city or on the highway?
The Stage 3 Mustang 5.0L 8-cyl supercharged RWD is rated 13 city and 20 highway MPG, so it is more efficient on the highway, by 7 MPG.
How does the 2020 Roush Performance Stage 3 Mustang compare with other small car configurations?
The Stage 3 Mustang 5.0L 8-cyl supercharged RWD costs about $5,260 a year to fuel, $2,030 more than the class median of $3,230, and less than 0 of 10 small car configurations. The comparison covers all 314 rated small car configurations for MY2020, not weighted by sales.