2020 GMC Terrain FWD 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 GMC Terrain FWD.

The 2020 GMC Terrain FWD has 2 model options: Automatic 9-spd 4-cyl, 1.5 L and Automatic 9-spd 4-cyl, 2.0 L.

The 2020 GMC Terrain FWD Automatic 9-spd 4-cyl, 1.5 L runs on regular gasoline and is in the Small Sport Utility Vehicle 2WD car class.

The 2020 GMC Terrain FWD Automatic 9-spd 4-cyl, 2.0 L runs on premium gasoline and is in the Small Sport Utility Vehicle 2WD car class.

🛣 How Many Miles per Gallon (MPG) Does a 2020 GMC Terrain FWD Get?

Across all models, the combined average MPG for the 2020 GMC Terrain FWD is 26 miles per gallon.

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

Model OptionCombined MPGCity MPGHighway MPG
Automatic 9-spd 4-cyl, 1.5 L272630
Automatic 9-spd 4-cyl, 2.0 L242228

💵 What is the Average Yearly Fuel Cost for a 2020 GMC Terrain FWD?

The average fuel costs for all models of the 2020 GMC Terrain FWD is $2,700.

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 GMC Terrain FWD to an average vehicle over 5 years, you will spend $2,000 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
Automatic 9-spd 4-cyl, 1.5 L$2,300save $0
Automatic 9-spd 4-cyl, 2.0 L$3,100spend $4,000 more

🛢 How Many Barrels of Petroleum Does a 2020 GMC Terrain FWD Consume?

Across all models, the average number barrels of petroleum that the 2020 GMC Terrain FWD will consume in one year is 12 barrels.

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

Model OptionBarrels
Automatic 9-spd 4-cyl, 1.5 L11
Automatic 9-spd 4-cyl, 2.0 L12

💨 How Many Grams of CO2 Does a 2020 GMC Terrain FWD Emit?

The 2020 GMC Terrain FWD will emit an average of about 5,062,500 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 173 trees would be needed to offset emissions from the 2020 GMC Terrain FWD.

Overview

The tables below cover all of the miles per gallon, engine specifications, and emission details we have for the 2 2020 GMC Terrain FWD model options.

Automatic 9-spd 4-cyl, 1.5 L

The table below contains all of the details we have for the 2020 GMC Terrain FWD Automatic 9-spd 4-cyl, 1.5 L:

City MPG26
Highway MPG30
Combined MPG27
Save/Spend vs Average CarSave $0
Fuel Cost$2,300
Fuel Type 1Regular
Barrels of Petroleum11
Grams of CO24,875,000
Trees Needed to Offset232
DriveFront-Wheel Drive
Cylinders4
Displacement1.5
TransmissionAutomatic 9-spd
Vehicle ClassSmall Sport Utility Vehicle 2WD
Start/Stop?Yes
Supercharged?No
Turbocharged?Yes

Automatic 9-spd 4-cyl, 2.0 L

The table below contains all of the details we have for the 2020 GMC Terrain FWD Automatic 9-spd 4-cyl, 2.0 L:

City MPG22
Highway MPG28
Combined MPG24
Save/Spend vs Average CarSpend $4,000
Fuel Cost$3,100
Fuel Type 1Premium
Barrels of Petroleum12
Grams of CO25,250,000
Trees Needed to Offset250
DriveFront-Wheel Drive
Cylinders4
Displacement2
TransmissionAutomatic 9-spd
Vehicle ClassSmall Sport Utility Vehicle 2WD
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.

  • "2020 GMC Terrain FWD MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/gmc/terrain-fwd/2020.

  • "2020 GMC Terrain FWD MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/gmc/terrain-fwd/2020. Accessed January 3, 2026.

  • 2020 GMC Terrain FWD MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/gmc/terrain-fwd/2020.