2021 Ford 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 2021 Ford Mustang.

The 2021 Ford Mustang has 5 model options: Manual 6-spd 4-cyl, 2.3 L, Automatic (S10) 4-cyl, 2.3 L, Manual 6-spd 8-cyl, 5.0 L, Automatic (S10) 8-cyl, 5.0 L and Automatic 10-spd 4-cyl, 2.3 L.

The 2021 Ford Mustang Manual 6-spd 4-cyl, 2.3 L runs on regular gasoline and is in the Subcompact Cars car class.

The 2021 Ford Mustang Automatic (S10) 4-cyl, 2.3 L runs on regular gasoline and is in the Subcompact Cars car class.

The 2021 Ford Mustang Manual 6-spd 8-cyl, 5.0 L runs on regular gasoline and is in the Subcompact Cars car class.

The 2021 Ford Mustang Automatic (S10) 8-cyl, 5.0 L runs on regular gasoline and is in the Subcompact Cars car class.

The 2021 Ford Mustang Automatic 10-spd 4-cyl, 2.3 L runs on regular gasoline and is in the Subcompact Cars car class.

🛣 How Many Miles per Gallon (MPG) Does a 2021 Ford Mustang Get?

Across all models, the combined average MPG for the 2021 Ford Mustang is 22 miles per gallon.

The table below breaks down the MPG for each model option:

Model OptionCombined MPGCity MPGHighway MPG
Manual 6-spd 4-cyl, 2.3 L242129
Automatic (S10) 4-cyl, 2.3 L252132
Manual 6-spd 8-cyl, 5.0 L181524
Automatic (S10) 8-cyl, 5.0 L191524
Automatic 10-spd 4-cyl, 2.3 L252132

💵 What is the Average Yearly Fuel Cost for a 2021 Ford Mustang?

The average fuel costs for all models of the 2021 Ford Mustang is $2,880.

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 2021 Ford Mustang to an average vehicle over 5 years, you will spend $2,900 more on fuel.

The table below shows the fuel costs and 5-year save/spend for each model option:

Model OptionFuel Cost5-Year Save/Spend
Manual 6-spd 4-cyl, 2.3 L$2,600spend $1,500 more
Automatic (S10) 4-cyl, 2.3 L$2,500spend $1,000 more
Manual 6-spd 8-cyl, 5.0 L$3,500spend $6,000 more
Automatic (S10) 8-cyl, 5.0 L$3,300spend $5,000 more
Automatic 10-spd 4-cyl, 2.3 L$2,500spend $1,000 more

🛢 How Many Barrels of Petroleum Does a 2021 Ford Mustang Consume?

Across all models, the average number barrels of petroleum that the 2021 Ford Mustang will consume in one year is 14 barrels.

The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.

Model OptionBarrels
Manual 6-spd 4-cyl, 2.3 L12
Automatic (S10) 4-cyl, 2.3 L12
Manual 6-spd 8-cyl, 5.0 L17
Automatic (S10) 8-cyl, 5.0 L16
Automatic 10-spd 4-cyl, 2.3 L12

💨 How Many Grams of CO2 Does a 2021 Ford Mustang Emit?

The 2021 Ford Mustang will emit an average of about 6,156,000 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 210 trees would be needed to offset emissions from the 2021 Ford Mustang.

Overview

The tables below cover all of the miles per gallon, engine specifications, and emission details we have for the 5 2021 Ford Mustang model options.

Manual 6-spd 4-cyl, 2.3 L

The table below contains all of the details we have for the 2021 Ford Mustang Manual 6-spd 4-cyl, 2.3 L:

City MPG21
Highway MPG29
Combined MPG24
Save/Spend vs Average CarSpend $1,500
Fuel Cost$2,600
Fuel Type 1Regular
Barrels of Petroleum12
Grams of CO25,595,000
Trees Needed to Offset266
DriveRear-Wheel Drive
Cylinders4
Displacement2.3
TransmissionManual 6-spd
Vehicle ClassSubcompact Cars
Start/Stop?No
Supercharged?No
Turbocharged?Yes

Automatic (S10) 4-cyl, 2.3 L

The table below contains all of the details we have for the 2021 Ford Mustang Automatic (S10) 4-cyl, 2.3 L:

City MPG21
Highway MPG32
Combined MPG25
Save/Spend vs Average CarSpend $1,000
Fuel Cost$2,500
Fuel Type 1Regular
Barrels of Petroleum12
Grams of CO25,340,000
Trees Needed to Offset254
DriveRear-Wheel Drive
Cylinders4
Displacement2.3
TransmissionAutomatic (S10)
Vehicle ClassSubcompact Cars
Start/Stop?No
Supercharged?No
Turbocharged?Yes

Manual 6-spd 8-cyl, 5.0 L

The table below contains all of the details we have for the 2021 Ford Mustang Manual 6-spd 8-cyl, 5.0 L:

City MPG15
Highway MPG24
Combined MPG18
Save/Spend vs Average CarSpend $6,000
Fuel Cost$3,500
Fuel Type 1Regular
Barrels of Petroleum17
Grams of CO27,350,000
Trees Needed to Offset350
DriveRear-Wheel Drive
Cylinders8
Displacement5
TransmissionManual 6-spd
Vehicle ClassSubcompact Cars
Start/Stop?No
Supercharged?No
Turbocharged?No

Automatic (S10) 8-cyl, 5.0 L

The table below contains all of the details we have for the 2021 Ford Mustang Automatic (S10) 8-cyl, 5.0 L:

City MPG15
Highway MPG24
Combined MPG19
Save/Spend vs Average CarSpend $5,000
Fuel Cost$3,300
Fuel Type 1Regular
Barrels of Petroleum16
Grams of CO27,185,000
Trees Needed to Offset342
DriveRear-Wheel Drive
Cylinders8
Displacement5
TransmissionAutomatic (S10)
Vehicle ClassSubcompact Cars
Start/Stop?No
Supercharged?No
Turbocharged?No

Automatic 10-spd 4-cyl, 2.3 L

The table below contains all of the details we have for the 2021 Ford Mustang Automatic 10-spd 4-cyl, 2.3 L:

City MPG21
Highway MPG32
Combined MPG25
Save/Spend vs Average CarSpend $1,000
Fuel Cost$2,500
Fuel Type 1Regular
Barrels of Petroleum12
Grams of CO25,310,000
Trees Needed to Offset253
DriveRear-Wheel Drive
Cylinders4
Displacement2.3
TransmissionAutomatic 10-spd
Vehicle ClassSubcompact Cars
Start/Stop?No
Supercharged?No
Turbocharged?Yes

Link To or Reference This Page

If you use this page in your research, please reference MPG Buddy as the source.

  • "2021 Ford Mustang MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/ford/mustang/2021.

  • "2021 Ford Mustang MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/ford/mustang/2021. Accessed January 3, 2026.

  • 2021 Ford Mustang MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/ford/mustang/2021.