Based on data from 51 vehicles, 4,714 fuel-ups and 1,124,301 miles of driving, the 2018 Subaru WRX STI gets a combined Avg MPG of 19.59 with a 0.10 MPG margin of error.

Any Engine Type 2.5L H4 GAS (51) Any Body Style Sedan (21) Any Submodel Sport (1) Type RA (4) STI (8) Sport-tech (8) Base (14) Limited (16)

Below you can see a distribution of the fuel-ups with 86 outliers (1.79%) removed.

Following shows the average MPG of each of the 51 vehicles in the system.

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• Black Unicorn

  2018 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Sep 2018 • 183 Fuel-ups

  Property of MizMoxie13

• 17.7 Avg MPG

• My WRX STI

  2018 Subaru WRX STI STI 2.5L H4 GAS Standard 6 Speed
  Added Jul 2018 • 187 Fuel-ups

  Property of Takeshi_173

• 15.6 Avg MPG

• Koraline

  2018 Subaru WRX STI Type RA 2.5L H4 GAS Manual 6 Speed Sedan
  Added Apr 2021 • 365 Fuel-ups

  Property of StephenPalmer

• 19.9 Avg MPG

• STI

  2018 Subaru WRX STI Limited 2.5L H4 GAS Standard 6 Speed Sedan
  Added Aug 2017 • 196 Fuel-ups

  Property of Hersheys

• 20.7 Avg MPG

• Bandit

  2018 Subaru WRX STI Limited 2.5L H4 GAS Standard 6 Speed Sedan
  Added Sep 2023 • 321 Fuel-ups

  Property of jdmorris

• 21.1 Avg MPG

• WRX STI 11.5

  2018 Subaru WRX STI STI 2.5L H4 GAS Manual 6 Speed
  Added Aug 2019 • 277 Fuel-ups

  Property of EricSum

• 22.4 Avg MPG

• Type RA

  2018 Subaru WRX STI Type RA 2.5L H4 GAS Manual 6 Speed Sedan
  Added Apr 2021 • 126 Fuel-ups

  Property of picantegamer

• 20.3 Avg MPG

• My WRX STI

  2018 Subaru WRX STI Sport-tech 2.5L H4 GAS Standard 6 Speed
  Added Apr 2018 • 112 Fuel-ups

  Property of 2018-STi

• 21.1 Avg MPG

• Selena

  2018 Subaru WRX STI Sport-tech 2.5L H4 GAS Manual 6 Speed Sedan
  Added Jul 2022 • 132 Fuel-ups

  Property of jasonkai

• 20.1 Avg MPG

• WRX STI RA

  2018 Subaru WRX STI Type RA 2.5L H4 GAS Manual 6 Speed
  Added Aug 2020 • 184 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

• '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

• 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

• 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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