2015 Roush Performance Stage 3 Mustang MPG and Fuel Economy
On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 2015 Roush Performance Stage 3 Mustang.
The 2015 Roush Performance Stage 3 Mustang has 2 model options: Automatic (S6) 8-cyl, 5.0 L and Manual 6-spd 8-cyl, 5.0 L.
The 2015 Roush Performance Stage 3 Mustang Automatic (S6) 8-cyl, 5.0 L runs on premium gasoline and is in the Midsize Cars car class.
The 2015 Roush Performance Stage 3 Mustang Manual 6-spd 8-cyl, 5.0 L runs on premium gasoline and is in the Midsize Cars car class.
🛣 How Many Miles per Gallon (MPG) Does a 2015 Roush Performance Stage 3 Mustang Get?
Across all models, the combined average MPG for the 2015 Roush Performance Stage 3 Mustang is 16 miles per gallon.
The table below breaks down the MPG for each model option:
| Model Option | Combined MPG | City MPG | Highway MPG |
|---|---|---|---|
| Automatic (S6) 8-cyl, 5.0 L | 16 | 13 | 23 |
| Manual 6-spd 8-cyl, 5.0 L | 16 | 13 | 23 |
💵 What is the Average Yearly Fuel Cost for a 2015 Roush Performance Stage 3 Mustang?
The average fuel costs for all models of the 2015 Roush Performance Stage 3 Mustang is $4,600.
The average fuel costs have been estimated by government regulators based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.
Comparing a 2015 Roush Performance Stage 3 Mustang to an average vehicle over 5 years, you will spend $11,500 more on fuel.
The table below shows the fuel costs and 5-year save/spend for each model option:
| Model Option | Fuel Cost | 5-Year Save/Spend |
|---|---|---|
| Automatic (S6) 8-cyl, 5.0 L | $4,600 | spend $11,500 more |
| Manual 6-spd 8-cyl, 5.0 L | $4,600 | spend $11,500 more |
The 2015 Roush Performance Stage 3 Mustang is also subject to the Gas Guzzler Tax, which is a federal tax on vehicles that has a combined MPG of less than 22.5.
The tables below show how much you can expect to pay in Gas Guzzler taxes.
| Model Option | Gas Guzzler Tax |
|---|---|
| Automatic (S6) 8-cyl, 5.0 L | $3,700 |
| Model Option | Gas Guzzler Tax |
|---|---|
| Manual 6-spd 8-cyl, 5.0 L | $3,700 |
🛢 How Many Barrels of Petroleum Does a 2015 Roush Performance Stage 3 Mustang Consume?
Across all models, the average number barrels of petroleum that the 2015 Roush Performance Stage 3 Mustang will consume in one year is 19 barrels.
The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.
| Model Option | Barrels |
|---|---|
| Automatic (S6) 8-cyl, 5.0 L | 19 |
| Manual 6-spd 8-cyl, 5.0 L | 19 |
💨 How Many Grams of CO2 Does a 2015 Roush Performance Stage 3 Mustang Emit?
The 2015 Roush Performance Stage 3 Mustang will emit an average of about 8,392,500 grams of CO2 per year.
🌳 To help you understand the impact of this, a normal tree will absorb around 21,000 grams of CO2 per year. This means that roughly 286 trees would be needed to offset emissions from the 2015 Roush Performance Stage 3 Mustang.
Overview
The tables below cover all of the miles per gallon, engine specifications, and emission details we have for the 2 2015 Roush Performance Stage 3 Mustang model options.
Automatic (S6) 8-cyl, 5.0 L
The table below contains all of the details we have for the 2015 Roush Performance Stage 3 Mustang Automatic (S6) 8-cyl, 5.0 L:
| City MPG | 13 |
|---|---|
| Highway MPG | 23 |
| Combined MPG | 16 |
| Save/Spend vs Average Car | Spend $11,500 |
| Gas Guzzler Tax | $3,700 |
| Fuel Cost | $4,600 |
| Fuel Type 1 | Premium |
| Barrels of Petroleum | 19 |
| Grams of CO2 | 8,295,000 |
| Trees Needed to Offset | 395 |
| Drive | Rear-Wheel Drive |
| Cylinders | 8 |
| Displacement | 5 |
| Transmission | Automatic (S6) |
| Vehicle Class | Midsize Cars |
| Start/Stop? | No |
| Supercharged? | Yes |
| Turbocharged? | No |
Manual 6-spd 8-cyl, 5.0 L
The table below contains all of the details we have for the 2015 Roush Performance Stage 3 Mustang Manual 6-spd 8-cyl, 5.0 L:
| City MPG | 13 |
|---|---|
| Highway MPG | 23 |
| Combined MPG | 16 |
| Save/Spend vs Average Car | Spend $11,500 |
| Gas Guzzler Tax | $3,700 |
| Fuel Cost | $4,600 |
| Fuel Type 1 | Premium |
| Barrels of Petroleum | 19 |
| Grams of CO2 | 8,490,000 |
| Trees Needed to Offset | 404 |
| Drive | Rear-Wheel Drive |
| Cylinders | 8 |
| Displacement | 5 |
| Transmission | Manual 6-spd |
| Vehicle Class | Midsize Cars |
| Start/Stop? | No |
| Supercharged? | Yes |
| Turbocharged? | No |
Link To or Reference This Page
If you use this page in your research, please reference MPG Buddy as the source.
<a href="https://mpgbuddy.com/cars/roush-performance/stage-3-mustang/2015">2015 Roush Performance Stage 3 Mustang MPG and Fuel Economy</a>
"2015 Roush Performance Stage 3 Mustang MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/roush-performance/stage-3-mustang/2015.
"2015 Roush Performance Stage 3 Mustang MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/roush-performance/stage-3-mustang/2015. Accessed January 3, 2026.
2015 Roush Performance Stage 3 Mustang MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/roush-performance/stage-3-mustang/2015.