Based on data from 23 vehicles, 1,380 fuel-ups and 303,902 miles of driving, the 2021 Subaru WRX STI gets a combined Avg MPG of 18.79 with a 0.18 MPG margin of error.

Any Engine Type 2.5L H4 GAS (23) Any Body Style Sedan (7) Any Submodel Limited (11) Base (12)

Below you can see a distribution of the fuel-ups with 12 outliers (0.86%) removed.

Following shows the average MPG of each of the 23 vehicles in the system.

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• WRX STI

  2021 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Sep 2024 • 27 Fuel-ups

  Property of spark100

• 17.6 Avg MPG

• WRX STI

  2021 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed Sedan
  Added May 2021 • 168 Fuel-ups

  Property of mistahchen

• 19.2 Avg MPG

• My WRX STI

  2021 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Mar 2022 • 237 Fuel-ups

  Property of Jbisset

• 18.5 Avg MPG

• My WRX STI

  2021 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Sep 2021 • 201 Fuel-ups

  Property of leanderwarner

• 17.4 Avg MPG

• WRX

  2021 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Jan 2022 • 127 Fuel-ups

  Property of CycloGeek54

• 17.1 Avg MPG

• My WRX STI

  2021 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Oct 2024 • 15 Fuel-ups

  Property of drewd8

• 16.8 Avg MPG

• WRX STI

  2021 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed Sedan
  Added Sep 2021 • 239 Fuel-ups

  Property of Matt35657

• 21.4 Avg MPG

• STI

  2021 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed Sedan
  Added Nov 2022 • 88 Fuel-ups

  Property of Lynseylu

• 20.4 Avg MPG

• My WRX STI

  2021 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Aug 2022 • 17 Fuel-ups

  Property of dazman83

• 19.8 Avg MPG

• Subaru WRX STi

  2021 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed Sedan
  Added Apr 2021 • 37 Fuel-ups

  Property of crodil2

• 23.2 Avg MPG

• My WRX STI

  2021 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Nov 2024 • 3 Fuel-ups

  Property of Alcina

• 15.0 Avg MPG

• Snow White STI

  2021 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added May 2021 • 70 Fuel-ups

  Property of tuned200

• 22.0 Avg MPG

• My WRX STI

  2021 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Jun 2022 • 21 Fuel-ups

  Property of JTGibbons

• 16.7 Avg MPG

• My STi

  2021 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed Sedan
  Added Sep 2021 • 29 Fuel-ups

  Property of brianzchen

• 18.4 Avg MPG

• STI Limited

  2021 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Jul 2021 • 28 Fuel-ups

  Property of Whaever

• 16.3 Avg MPG

• 2021 WRX STI

  2021 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Aug 2021 • 16 Fuel-ups

  Property of refimage

• 18.5 Avg MPG

• My WRX STI

  2021 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Dec 2022 • 37 Fuel-ups

  Property of carguy560740

• 18.3 Avg MPG

• My WRX STI

  2021 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Jul 2021 • 13 Fuel-ups

  Property of jasonbrent

• 21.4 Avg MPG

• Louise

  2021 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Apr 2022 • 10 Fuel-ups

  Property of BitTexas

• 19.0 Avg MPG

• Revenant

  2021 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed Sedan
  Added Apr 2021 • 53 Fuel-ups

  Property of sliceoflife

• 22.1 Avg MPG

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