Based on data from 50 vehicles, 4,616 fuel-ups and 1,101,564 miles of driving, the 2018 Subaru WRX STI gets a combined Avg MPG of 19.62 with a 0.10 MPG margin of error.

Any Engine Type 2.5L H4 GAS (50) Any Body Style Sedan (20) Any Submodel Sport (1) Type RA (4) STI (8) Sport-tech (8) Base (14) Limited (15)

Below you can see a distribution of the fuel-ups with 67 outliers (1.43%) removed.

Following shows the average MPG of each of the 50 vehicles in the system.

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• My WRX STI

  2018 Subaru WRX STI STI 2.5L H4 GAS Standard 6 Speed
  Added Jul 2018 • 178 Fuel-ups

  Property of Takeshi_173

• 15.6 Avg MPG

• Black Unicorn

  2018 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Sep 2018 • 171 Fuel-ups

  Property of MizMoxie13

• 17.7 Avg MPG

• Bandit

  2018 Subaru WRX STI Limited 2.5L H4 GAS Standard 6 Speed Sedan
  Added Sep 2023 • 312 Fuel-ups

  Property of jdmorris

• 21.3 Avg MPG

• WRX STI RA

  2018 Subaru WRX STI Type RA 2.5L H4 GAS Manual 6 Speed
  Added Aug 2020 • 183 Fuel-ups

  Property of blue04sti

• 17.3 Avg MPG

• Wingnut

  2018 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed Sedan
  Added Mar 2018 • 142 Fuel-ups

  Property of josnroh

• 21.6 Avg MPG

• STI

  2018 Subaru WRX STI Limited 2.5L H4 GAS Standard 6 Speed Sedan
  Added Aug 2017 • 188 Fuel-ups

  Property of Hersheys

• 20.8 Avg MPG

• Koraline

  2018 Subaru WRX STI Type RA 2.5L H4 GAS Manual 6 Speed Sedan
  Added Apr 2021 • 357 Fuel-ups

  Property of StephenPalmer

• 20.0 Avg MPG

• WRX STI 11.5

  2018 Subaru WRX STI STI 2.5L H4 GAS Manual 6 Speed
  Added Aug 2019 • 266 Fuel-ups

  Property of EricSum

• 22.4 Avg MPG

• My WRX STI

  2018 Subaru WRX STI Sport-tech 2.5L H4 GAS Standard 6 Speed
  Added Apr 2018 • 109 Fuel-ups

  Property of 2018-STi

• 21.1 Avg MPG

• '18 STI

  2018 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed Sedan
  Added Aug 2017 • 254 Fuel-ups

  Property of clapanse

• 20.0 Avg MPG

• My WRX STI

  2018 Subaru WRX STI STI 2.5L H4 GAS Manual 6 Speed
  Added Feb 2020 • 171 Fuel-ups

  Property of SensibleHeat

• 19.1 Avg MPG

• Type RA

  2018 Subaru WRX STI Type RA 2.5L H4 GAS Manual 6 Speed Sedan
  Added Apr 2021 • 125 Fuel-ups

  Property of picantegamer

• 20.3 Avg MPG

• STi

  2018 Subaru WRX STI 2.5L H4 GAS Standard 6 Speed Sedan
  Added Nov 2017 • 136 Fuel-ups

  Property of jon10203405060

• 21.8 Avg MPG

• My WRX STI

  2018 Subaru WRX STI Sport-tech 2.5L H4 GAS Manual 6 Speed
  Added Jul 2018 • 180 Fuel-ups

  Property of takobo

• 18.9 Avg MPG

• My WRX STI

  2018 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Sep 2022 • 125 Fuel-ups

  Property of thexflames

• 14.9 Avg MPG

• Selena

  2018 Subaru WRX STI Sport-tech 2.5L H4 GAS Manual 6 Speed Sedan
  Added Jul 2022 • 130 Fuel-ups

  Property of jasonkai

• 20.0 Avg MPG

• WRX STI

  2018 Subaru WRX STI Sport-tech 2,5L H4 GAS Manual 6 Speed
  Added Mar 2018 • 311 Fuel-ups

  Property of agleask

• 23.7 Avg MPG

• Stacy

  2018 Subaru WRX STI 2.5L H4 GAS Standard 6 Speed
  Added Jul 2018 • 257 Fuel-ups

  Property of mut8dsupafly

• 18.3 Avg MPG

• My Spec.R STI WRX

  2018 Subaru WRX STI STI 2.5L H4 GAS Manual 6 Speed Sedan
  Added Oct 2022 • 10 Fuel-ups

  Property of scottd72

• 21.6 Avg MPG

• My WRX STI

  2018 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Feb 2023 • 53 Fuel-ups

  Property of buklaosta

• 15.7 Avg MPG

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