2020 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 2020 Roush Performance Stage 3 Mustang.
The 2020 Roush Performance Stage 3 Mustang has 2 model options: Manual 6-spd 8-cyl, 5.0 L and Automatic (S10) 8-cyl, 5.0 L.
The 2020 Roush Performance Stage 3 Mustang Manual 6-spd 8-cyl, 5.0 L runs on premium gasoline and is in the Subcompact Cars car class.
The 2020 Roush Performance Stage 3 Mustang Automatic (S10) 8-cyl, 5.0 L runs on premium gasoline and is in the Subcompact Cars car class.
🛣 How Many Miles per Gallon (MPG) Does a 2020 Roush Performance Stage 3 Mustang Get?
Across all models, the combined average MPG for the 2020 Roush Performance Stage 3 Mustang is 15 miles per gallon.
The table below breaks down the MPG for each model option:
| Model Option | Combined MPG | City MPG | Highway MPG |
|---|---|---|---|
| Manual 6-spd 8-cyl, 5.0 L | 15 | 13 | 20 |
| Automatic (S10) 8-cyl, 5.0 L | 14 | 12 | 18 |
💵 What is the Average Yearly Fuel Cost for a 2020 Roush Performance Stage 3 Mustang?
The average fuel costs for all models of the 2020 Roush Performance Stage 3 Mustang is $5,125.
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 2020 Roush Performance Stage 3 Mustang to an average vehicle over 5 years, you will spend $14,125 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 |
|---|---|---|
| Manual 6-spd 8-cyl, 5.0 L | $4,950 | spend $13,250 more |
| Automatic (S10) 8-cyl, 5.0 L | $5,300 | spend $15,000 more |
The 2020 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 |
|---|---|
| Manual 6-spd 8-cyl, 5.0 L | $4,500 |
| Model Option | Gas Guzzler Tax |
|---|---|
| Automatic (S10) 8-cyl, 5.0 L | $5,400 |
🛢 How Many Barrels of Petroleum Does a 2020 Roush Performance Stage 3 Mustang Consume?
Across all models, the average number barrels of petroleum that the 2020 Roush Performance Stage 3 Mustang will consume in one year is 21 barrels.
The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.
| Model Option | Barrels |
|---|---|
| Manual 6-spd 8-cyl, 5.0 L | 20 |
| Automatic (S10) 8-cyl, 5.0 L | 21 |
💨 How Many Grams of CO2 Does a 2020 Roush Performance Stage 3 Mustang Emit?
The 2020 Roush Performance Stage 3 Mustang will emit an average of about 8,910,000 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 303 trees would be needed to offset emissions from the 2020 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 2020 Roush Performance Stage 3 Mustang model options.
Manual 6-spd 8-cyl, 5.0 L
The table below contains all of the details we have for the 2020 Roush Performance Stage 3 Mustang Manual 6-spd 8-cyl, 5.0 L:
| City MPG | 13 |
|---|---|
| Highway MPG | 20 |
| Combined MPG | 15 |
| Save/Spend vs Average Car | Spend $13,250 |
| Gas Guzzler Tax | $4,500 |
| Fuel Cost | $4,950 |
| Fuel Type 1 | Premium |
| Barrels of Petroleum | 20 |
| Grams of CO2 | 8,550,000 |
| Trees Needed to Offset | 407 |
| Drive | Rear-Wheel Drive |
| Cylinders | 8 |
| Displacement | 5 |
| Transmission | Manual 6-spd |
| Vehicle Class | Subcompact Cars |
| Start/Stop? | No |
| Supercharged? | Yes |
| Turbocharged? | No |
Automatic (S10) 8-cyl, 5.0 L
The table below contains all of the details we have for the 2020 Roush Performance Stage 3 Mustang Automatic (S10) 8-cyl, 5.0 L:
| City MPG | 12 |
|---|---|
| Highway MPG | 18 |
| Combined MPG | 14 |
| Save/Spend vs Average Car | Spend $15,000 |
| Gas Guzzler Tax | $5,400 |
| Fuel Cost | $5,300 |
| Fuel Type 1 | Premium |
| Barrels of Petroleum | 21 |
| Grams of CO2 | 9,270,000 |
| Trees Needed to Offset | 441 |
| Drive | Rear-Wheel Drive |
| Cylinders | 8 |
| Displacement | 5 |
| Transmission | Automatic (S10) |
| Vehicle Class | Subcompact 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/2020">2020 Roush Performance Stage 3 Mustang MPG and Fuel Economy</a>
"2020 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/2020.
"2020 Roush Performance Stage 3 Mustang MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/roush-performance/stage-3-mustang/2020. Accessed January 3, 2026.
2020 Roush Performance Stage 3 Mustang MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/roush-performance/stage-3-mustang/2020.