2018 Subaru WRX STI Type RA 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 Subaru WRX STI Type RA.

The 2018 Subaru WRX STI Type RA runs on premium gasoline and is in the Compact Cars car class.

Whether you are considering a purchase of the car, or just wanting to find out how economical and environmentally friendly (or un-friendly) your 2018 Subaru WRX STI Type RA is, we have the information you need.

🛣 How Many Miles per Gallon (MPG) Does a 2018 Subaru WRX STI Type RA Get?

First off, the most commonly asked question. A 2018 Subaru WRX STI Type RA gets up to 16 miles per gallon in the city, and 22 miles per gallon on the highway.

The combined average MPG for the 2018 Subaru WRX STI Type RA is 18 miles per gallon.

💵 What is the Average Yearly Fuel Cost for a 2018 Subaru WRX STI Type RA?

The estimated fuel costs for the 2018 Subaru WRX STI Type RA is $4,100 per year.

That value has 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.

If you were to compare a 2018 Subaru WRX STI Type RA to an average vehicle over 5 years, you will spend $9,000 more on fuel.

🛢 How Many Barrels of Petroleum Does a 2018 Subaru WRX STI Type RA Consume?

The 2018 Subaru WRX STI Type RA will consume roughly 17 barrels of petroleum per year, using the standard estimate of 15,000 miles per year.

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

💨 How Many Grams of CO2 Does a 2018 Subaru WRX STI Type RA Emit?

For every mile driven, the 2018 Subaru WRX STI Type RA will emit 477 grams of CO2, which is about 7,155,000 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 244 trees would be needed to offset emissions from the 2018 Subaru WRX STI Type RA.

Overview

The table below covers all of the miles per gallon, engine specifications, and emission details we have for the 2018 Subaru WRX STI Type RA.

City MPG16
Highway MPG22
Combined MPG18
Save/Spend vs Average CarSpend $9,000
Fuel Cost$4,100
Fuel Type 1Premium
Barrels of Petroleum17
Grams of CO27,155,000
Trees Needed to Offset341
DriveAll-Wheel Drive
Cylinders4
Displacement2.5
TransmissionManual 6-spd
Vehicle ClassCompact Cars
Start/Stop?No
Supercharged?No
Turbocharged?Yes

Related Subaru Models from 2018

If you're interested in other Subaru models from 2018, you can find them in the table below. You can click the model link to find miles per gallon and emission information for that model.

Link To or Reference This Page

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

  • "2018 Subaru WRX STI Type RA MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/subaru/wrx-sti-type-ra/2018.

  • "2018 Subaru WRX STI Type RA MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/subaru/wrx-sti-type-ra/2018. Accessed January 3, 2026.

  • 2018 Subaru WRX STI Type RA MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/subaru/wrx-sti-type-ra/2018.