The Subaru STI gas mileage is 18 to 20 miles per gallon as specified in our data below, organized by trim, option package, and model year.
For example, the 2019 Subaru STI S209 STi trim model has a combined gas mileage of 18 miles per gallon, while the 2016 Subaru STI WRX STI Series Hyper Blue has a combined gas mileage of 20 miles per gallon.
In the city, the STI gas mileage is 15 to 17 miles per gallon depending on the trim and model year.
On the highway, the STI gas mileage is 21 to 23 miles per gallon depending on the trim and model year.
Note: The gas mileage shown for hybrid vehicles is the miles per gallon equivalent.
Check out the Gas Mileage specifications for other makes and models.
2019 Subaru STI Gas Mileage
The 2019 Subaru STI gas mileage is 18 miles per gallon combined.
In the city, the 2019 STI gas mileage is 15 miles per gallon.
On the highway, the 2019 STI gas mileage is 21 miles per gallon.
2019 Subaru STI Gas Mileage (Imperial)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| S209 STi Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
15 city mpg | 21 hwy mpg | 18 combined mpg |
| S209 2.5T |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
15 city mpg | 21 hwy mpg | 18 combined mpg |
2019 Subaru STI Gas Mileage (Metric)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| S209 STi Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
16.0 city L/100 km | 11.0 hwy L/100 km | 13.0 combined L/100 km |
| S209 2.5T |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
16.0 city L/100 km | 11.0 hwy L/100 km | 13.0 combined L/100 km |
2016 Subaru STI Gas Mileage
The 2016 Subaru STI gas mileage is 20 miles per gallon combined.
In the city, the 2016 STI gas mileage is 17 miles per gallon.
On the highway, the 2016 STI gas mileage is 23 miles per gallon.
2016 Subaru STI Gas Mileage (Imperial)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| WRX STI Series Hyper Blue Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
17 city mpg | 23 hwy mpg | 20 combined mpg |
| WRX STI Limited Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
17 city mpg | 23 hwy mpg | 20 combined mpg |
| WRX STI Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
17 city mpg | 23 hwy mpg | 20 combined mpg |
2016 Subaru STI Gas Mileage (Metric)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| WRX STI Series Hyper Blue Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
14.0 city L/100 km | 10.0 hwy L/100 km | 12.0 combined L/100 km |
| WRX STI Limited Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
14.0 city L/100 km | 10.0 hwy L/100 km | 12.0 combined L/100 km |
| WRX STI Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
14.0 city L/100 km | 10.0 hwy L/100 km | 12.0 combined L/100 km |
2015 Subaru STI Gas Mileage
The 2015 Subaru STI gas mileage is 20 miles per gallon combined.
In the city, the 2015 STI gas mileage is 17 miles per gallon.
On the highway, the 2015 STI gas mileage is 23 miles per gallon.
2015 Subaru STI Gas Mileage (Imperial)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| WRX STI Limited Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
17 city mpg | 23 hwy mpg | 20 combined mpg |
| WRX STI Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
17 city mpg | 23 hwy mpg | 20 combined mpg |
| WRX Sed STI Launch Edition |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
17 city mpg | 23 hwy mpg | 20 combined mpg |
2015 Subaru STI Gas Mileage (Metric)
| Trim |
Engine | Transmission | Drivetrain |
City | Highway | Combined Mileage |
| WRX STI Limited Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
14.0 city L/100 km | 10.0 hwy L/100 km | 12.0 combined L/100 km |
| WRX STI Sedan |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
14.0 city L/100 km | 10.0 hwy L/100 km | 12.0 combined L/100 km |
| WRX Sed STI Launch Edition |
2.5L | Intercooled Turbo | H4 | 6 Spd Manual w/OD | AWD |
14.0 city L/100 km | 10.0 hwy L/100 km | 12.0 combined L/100 km |
Subaru STI Gas Mileage Data Brought To You By AutoPadre
Subaru STI Gas Mileage Comparisons By Year