2023 Subaru Legacy AWD MPG and Fuel Economy

On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 2023 Subaru Legacy AWD.

The 2023 Subaru Legacy AWD has 2 model options: Automatic (AV-S8) 4-cyl, 2.5 L and Automatic (AV-S8) 4-cyl, 2.4 L.

The 2023 Subaru Legacy AWD Automatic (AV-S8) 4-cyl, 2.5 L runs on regular gasoline and is in the Large Cars car class.

The 2023 Subaru Legacy AWD Automatic (AV-S8) 4-cyl, 2.4 L runs on regular gasoline and is in the Large Cars car class.

🛣 How Many Miles per Gallon (MPG) Does a 2023 Subaru Legacy AWD Get?

Across all models, the combined average MPG for the 2023 Subaru Legacy AWD is 28 miles per gallon.

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

Model OptionCombined MPGCity MPGHighway MPG
Automatic (AV-S8) 4-cyl, 2.5 L302735
Automatic (AV-S8) 4-cyl, 2.4 L262331

💵 What is the Average Yearly Fuel Cost for a 2023 Subaru Legacy AWD?

The average fuel costs for all models of the 2023 Subaru Legacy AWD is $1,825.

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 2023 Subaru Legacy AWD to an average vehicle over 5 years, you will spend $125 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
Automatic (AV-S8) 4-cyl, 2.5 L$1,700save $500
Automatic (AV-S8) 4-cyl, 2.4 L$1,950spend $750 more

🛢 How Many Barrels of Petroleum Does a 2023 Subaru Legacy AWD Consume?

Across all models, the average number barrels of petroleum that the 2023 Subaru Legacy AWD will consume in one year is 11 barrels.

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

Model OptionBarrels
Automatic (AV-S8) 4-cyl, 2.5 L10
Automatic (AV-S8) 4-cyl, 2.4 L11

💨 How Many Grams of CO2 Does a 2023 Subaru Legacy AWD Emit?

The 2023 Subaru Legacy AWD will emit an average of about 4,740,000 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 162 trees would be needed to offset emissions from the 2023 Subaru Legacy AWD.

Overview

The tables below cover all of the miles per gallon, engine specifications, and emission details we have for the 2 2023 Subaru Legacy AWD model options.

Automatic (AV-S8) 4-cyl, 2.5 L

The table below contains all of the details we have for the 2023 Subaru Legacy AWD Automatic (AV-S8) 4-cyl, 2.5 L:

City MPG27
Highway MPG35
Combined MPG30
Save/Spend vs Average CarSave $500
Fuel Cost$1,700
Fuel Type 1Regular
Barrels of Petroleum10
Grams of CO24,425,000
Trees Needed to Offset211
DriveAll-Wheel Drive
Cylinders4
Displacement2.5
TransmissionAutomatic (AV-S8)
Vehicle ClassLarge Cars
Start/Stop?Yes
Supercharged?No
Turbocharged?No

Automatic (AV-S8) 4-cyl, 2.4 L

The table below contains all of the details we have for the 2023 Subaru Legacy AWD Automatic (AV-S8) 4-cyl, 2.4 L:

City MPG23
Highway MPG31
Combined MPG26
Save/Spend vs Average CarSpend $750
Fuel Cost$1,950
Fuel Type 1Regular
Barrels of Petroleum11
Grams of CO25,055,000
Trees Needed to Offset241
DriveAll-Wheel Drive
Cylinders4
Displacement2.4
TransmissionAutomatic (AV-S8)
Vehicle ClassLarge Cars
Start/Stop?Yes
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.

  • "2023 Subaru Legacy AWD MPG and Fuel Economy." MPG Buddy. Accessed on December 27, 2025. https://mpgbuddy.com/cars/subaru/legacy-awd/2023.

  • "2023 Subaru Legacy AWD MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/subaru/legacy-awd/2023. Accessed December 27, 2025.

  • 2023 Subaru Legacy AWD MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/subaru/legacy-awd/2023.