Roush Performance Stage 3 Mustang
14.5 MPG The 2020 Roush Performance Stage 3 Mustang is EPA-rated at 14.5 MPG combined (12.5 city / 19 highway). Over 15,000 miles a year that is about 1034 gallons, $3310 a year in fuel, or $0.221 per mile at $3.20/gal.
Across its full 2001–2020 run it averages 16.7 MPG, falling by 3.5 MPG over 18 model years.
Running cost at different fuel prices and mileages
The figure everyone actually wants, and the one the EPA does not publish — because it depends on a fuel price no agency will commit to.
| Fuel price | Per mile | 10,000 mi/yr | 15,000 mi/yr | 20,000 mi/yr |
|---|---|---|---|---|
| $2.50/gal | $0.172 | $1724 | $2586 | $3448 |
| $3.00/gal | $0.207 | $2069 | $3103 | $4138 |
| $3.20/gal | $0.221 | $2207 | $3310 | $4414 |
| $3.50/gal | $0.241 | $2414 | $3621 | $4828 |
| $4.00/gal | $0.276 | $2759 | $4138 | $5517 |
| $4.50/gal | $0.310 | $3103 | $4655 | $6207 |
| $5.00/gal | $0.345 | $3448 | $5172 | $6897 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2020 | 14.5 MPG | 12.5 | 19 | $5325 | 594 | 2 |
| 2019 | 15 MPG | 12.5 | 19.5 | $5150 | 585 | 2 |
| 2017 | 16.5 MPG | 13.5 | 22.5 | $4675 | 545 | 2 |
| 2016 | 16.5 MPG | 13.5 | 23 | $4675 | 552 | 2 |
| 2015 | 16 MPG | 13 | 23 | $4800 | 560 | 2 |
| 2014 | 17 MPG | 14.5 | 22 | $4550 | 518 | 2 |
| 2013 | 17.5 MPG | 15 | 22.5 | $4425 | 509 | 2 |
| 2012 | 17 MPG | 14.5 | 21.5 | $4550 | 525 | 2 |
| 2011 | 16 MPG | 14 | 21 | $4800 | 555 | 1 |
| 2010 | 17.5 MPG | 14.5 | 22 | $4425 | 508 | 2 |
| 2009 | 16.5 MPG | 14.5 | 20 | $4675 | 539 | 2 |
| 2008 | 16.5 MPG | 14.5 | 20 | $4675 | 539 | 2 |
| 2007 | 16 MPG | 14 | 20 | $4800 | 555 | 1 |
| 2006 | 16 MPG | 14 | 20 | $4800 | 555 | 1 |
| 2004 | 18 MPG | 15 | 23 | $4300 | 494 | 1 |
| 2003 | 17.5 MPG | 15 | 22 | $4425 | 508 | 2 |
| 2002 | 18 MPG | 15.5 | 22 | $4300 | 494 | 2 |
| 2001 | 18 MPG | 15.5 | 22 | $4300 | 494 | 2 |
Where a model year offered several engines or drivetrains, the figure is the average across all EPA-tested trims that year — the trim count is shown so you can see how much averaging is involved.
How it compares in its class
Among the 229 subcompact cars models tracked here, the Roush Performance Stage 3 Mustang ranks 220 on current figures, against a class average of 24.2 MPG.
Closest more-efficient alternatives in the same class: BMW 850ci (15), Audi S4 Cabriolet (15.5), BMW M3 Coupe (16), Ford Shelby GT350 Mustang (16), Maserati GranTurismo (16).
Tailpipe CO₂ is rated at 594 grams per mile, which works out to roughly 8.9 tonnes a year at 15,000 miles.
Questions
What MPG does the Roush Performance Stage 3 Mustang get?
The 2020 Roush Performance Stage 3 Mustang is rated at 14.5 MPG combined by the EPA — 12.5 city and 19 highway. Across all 18 model years in the database it averages 16.7 MPG, ranging from 14 to 18 depending on year and trim.
How much does a Roush Performance Stage 3 Mustang cost in fuel per year?
At 14.5 MPG and 15,000 miles a year, it burns about 1034 gallons — roughly $3310 a year with fuel at $3.20 a gallon, or $0.221 per mile. The EPA's own published annual figure for the 2020 model is $5325.
Has the Roush Performance Stage 3 Mustang become more efficient over time?
No — it has actually gone backwards, from 18 MPG in 2001 to 14.5 in 2020. That usually reflects the model growing heavier, more powerful, or moving upmarket rather than the engineering getting worse.
Is the Roush Performance Stage 3 Mustang efficient for its class?
It ranks 220 of 229 in the Subcompact Cars class on current figures, against a class average of 24.2 MPG. That is 9.7 worse than typical for the class.
EPA test figures from fueleconomy.gov. Cost per mile and annual fuel spend are computed at a reference price of $3.20 per gallon — use your own price. Estimates based on official test figures and average fuel prices. Real-world consumption varies with driving style, load, terrain and maintenance.