2021 Ford Mustang Convertible 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 Convertible.

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

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

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

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

The 2021 Ford Mustang Convertible 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 Convertible Get?

Across all models, the combined average MPG for the 2021 Ford Mustang Convertible 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 L232027
Automatic (S10) 4-cyl, 2.3 L232028
Automatic (S10) 8-cyl, 5.0 L181523
Automatic 10-spd 4-cyl, 2.3 L232028

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

The average fuel costs for all models of the 2021 Ford Mustang Convertible is $2,900.

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 Convertible to an average vehicle over 5 years, you will spend $3,000 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$2,700spend $2,000 more
Automatic (S10) 4-cyl, 2.3 L$2,700spend $2,000 more
Automatic (S10) 8-cyl, 5.0 L$3,500spend $6,000 more
Automatic 10-spd 4-cyl, 2.3 L$2,700spend $2,000 more

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

Across all models, the average number barrels of petroleum that the 2021 Ford Mustang Convertible 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 L13
Automatic (S10) 4-cyl, 2.3 L13
Automatic (S10) 8-cyl, 5.0 L17
Automatic 10-spd 4-cyl, 2.3 L13

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

The 2021 Ford Mustang Convertible will emit an average of about 6,198,750 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 211 trees would be needed to offset emissions from the 2021 Ford Mustang Convertible.

Overview

The tables below cover all of the miles per gallon, engine specifications, and emission details we have for the 4 2021 Ford Mustang Convertible 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 Convertible Manual 6-spd 4-cyl, 2.3 L:

City MPG20
Highway MPG27
Combined MPG23
Save/Spend vs Average CarSpend $2,000
Fuel Cost$2,700
Fuel Type 1Regular
Barrels of Petroleum13
Grams of CO25,790,000
Trees Needed to Offset276
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 Convertible Automatic (S10) 4-cyl, 2.3 L:

City MPG20
Highway MPG28
Combined MPG23
Save/Spend vs Average CarSpend $2,000
Fuel Cost$2,700
Fuel Type 1Regular
Barrels of Petroleum13
Grams of CO25,805,000
Trees Needed to Offset276
DriveRear-Wheel Drive
Cylinders4
Displacement2.3
TransmissionAutomatic (S10)
Vehicle ClassSubcompact Cars
Start/Stop?No
Supercharged?No
Turbocharged?Yes

Automatic (S10) 8-cyl, 5.0 L

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

City MPG15
Highway MPG23
Combined MPG18
Save/Spend vs Average CarSpend $6,000
Fuel Cost$3,500
Fuel Type 1Regular
Barrels of Petroleum17
Grams of CO27,395,000
Trees Needed to Offset352
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 Convertible Automatic 10-spd 4-cyl, 2.3 L:

City MPG20
Highway MPG28
Combined MPG23
Save/Spend vs Average CarSpend $2,000
Fuel Cost$2,700
Fuel Type 1Regular
Barrels of Petroleum13
Grams of CO25,805,000
Trees Needed to Offset276
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 Convertible MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/ford/mustang-convertible/2021.

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

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