2018 Toyota Highlander MPG and Fuel Economy

On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 2018 Toyota Highlander.

The 2018 Toyota Highlander has 2 model options: Automatic (S6) 4-cyl, 2.7 L and Automatic (S8) 6-cyl, 3.5 L.

The 2018 Toyota Highlander Automatic (S6) 4-cyl, 2.7 L runs on regular gasoline and is in the Small Sport Utility Vehicle 2WD car class.

The 2018 Toyota Highlander Automatic (S8) 6-cyl, 3.5 L runs on regular gasoline and is in the Small Sport Utility Vehicle 2WD car class.

🛣 How Many Miles per Gallon (MPG) Does a 2018 Toyota Highlander Get?

Across all models, the combined average MPG for the 2018 Toyota Highlander is 23 miles per gallon.

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

Model OptionCombined MPGCity MPGHighway MPG
Automatic (S6) 4-cyl, 2.7 L222024
Automatic (S8) 6-cyl, 3.5 L232027

💵 What is the Average Yearly Fuel Cost for a 2018 Toyota Highlander?

The average fuel costs for all models of the 2018 Toyota Highlander is $2,775.

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 2018 Toyota Highlander to an average vehicle over 5 years, you will spend $2,375 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 (S6) 4-cyl, 2.7 L$2,850spend $2,750 more
Automatic (S8) 6-cyl, 3.5 L$2,700spend $2,000 more

🛢 How Many Barrels of Petroleum Does a 2018 Toyota Highlander Consume?

Across all models, the average number barrels of petroleum that the 2018 Toyota Highlander 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
Automatic (S6) 4-cyl, 2.7 L14
Automatic (S8) 6-cyl, 3.5 L13

💨 How Many Grams of CO2 Does a 2018 Toyota Highlander Emit?

The 2018 Toyota Highlander will emit an average of about 5,985,000 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 204 trees would be needed to offset emissions from the 2018 Toyota Highlander.

Overview

The tables below cover all of the miles per gallon, engine specifications, and emission details we have for the 2 2018 Toyota Highlander model options.

Automatic (S6) 4-cyl, 2.7 L

The table below contains all of the details we have for the 2018 Toyota Highlander Automatic (S6) 4-cyl, 2.7 L:

City MPG20
Highway MPG24
Combined MPG22
Save/Spend vs Average CarSpend $2,750
Fuel Cost$2,850
Fuel Type 1Regular
Barrels of Petroleum14
Grams of CO26,105,000
Trees Needed to Offset291
DriveFront-Wheel Drive
Cylinders4
Displacement2.7
TransmissionAutomatic (S6)
Vehicle ClassSmall Sport Utility Vehicle 2WD
Start/Stop?No
Supercharged?No
Turbocharged?No

Automatic (S8) 6-cyl, 3.5 L

The table below contains all of the details we have for the 2018 Toyota Highlander Automatic (S8) 6-cyl, 3.5 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 CO25,865,000
Trees Needed to Offset279
DriveFront-Wheel Drive
Cylinders6
Displacement3.5
TransmissionAutomatic (S8)
Vehicle ClassSmall Sport Utility Vehicle 2WD
Start/Stop?No
Supercharged?No
Turbocharged?No

Link To or Reference This Page

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

  • "2018 Toyota Highlander MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/toyota/highlander/2018.

  • "2018 Toyota Highlander MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/toyota/highlander/2018. Accessed January 3, 2026.

  • 2018 Toyota Highlander MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/toyota/highlander/2018.