Based on data from 33 vehicles, 3,213 fuel-ups and 724,536 miles of driving, the 2020 Subaru WRX STI gets a combined Avg MPG of 19.23 with a 0.15 MPG margin of error.

Any Engine Type 2.5L H4 GAS (32) Any Body Style Sedan (8) Any Submodel Sport-tech (2) STI (3) Limited (10) Base (18)

Below you can see a distribution of the fuel-ups with 17 outliers (0.53%) removed.

Following shows the average MPG of each of the 33 vehicles in the system.

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• My WRX STI

  2020 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Feb 2021 • 194 Fuel-ups

  Property of adubs81

• 20.4 Avg MPG

• My WRX STI

  2020 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Feb 2024 • 126 Fuel-ups

  Property of cmb146

• 18.7 Avg MPG

• 2020 Subaru WRX STI

  2020 Subaru WRX STI STI 2.5L H4 GAS Manual 6 Speed Sedan
  Added Apr 2021 • 128 Fuel-ups

  Property of Hondajunkie

• 18.3 Avg MPG

• Lancelot

  2020 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Oct 2024 • 40 Fuel-ups

  Property of ehaylock

• 19.2 Avg MPG

• My WRX STI

  2020 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Apr 2024 • 70 Fuel-ups

  Property of CarissaT

• 19.2 Avg MPG

• My WRX STI

  2020 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Feb 2020 • 136 Fuel-ups

  Property of savafan1

• 20.3 Avg MPG

• Keiko

  2020 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Feb 2020 • 99 Fuel-ups

  Property of cmilktoast

• 17.2 Avg MPG

• Blue WRX STI

  2020 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Jan 2021 • 235 Fuel-ups

  Property of HWRX

• 20.7 Avg MPG

• My WRX STI

  2020 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Mar 2021 • 105 Fuel-ups

  Property of jpiekar3

• 22.3 Avg MPG

• My WRX STI

  2020 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Nov 2020 • 180 Fuel-ups

  Property of warrinerjake99

• 22.2 Avg MPG

• My WRX STI

  2020 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Mar 2020 • 122 Fuel-ups

  Property of chaosalys

• 18.8 Avg MPG

• My WRX STI

  2020 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Jul 2020 • 179 Fuel-ups

  Property of basedern

• 13.0 Avg MPG

• My WRX STI

  2020 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed Sedan
  Added Apr 2022 • 64 Fuel-ups

  Property of jlong1989

• 14.1 Avg MPG

• My WRX STI

  2020 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Apr 2020 • 396 Fuel-ups

  Property of tcole193

• 17.3 Avg MPG

• My WRX STI

  2020 Subaru WRX STI Sport-tech 2.5L H4 GAS Manual 6 Speed
  Added Feb 2021 • 148 Fuel-ups

  Property of Stealthman1000

• 18.1 Avg MPG

• New STI

  2020 Subaru WRX STI Sport-tech 2.5L H4 GAS Manual 6 Speed Sedan
  Added Mar 2025 • 23 Fuel-ups

  Property of tgrclw

• 23.5 Avg MPG

• WRX STI

  2020 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Nov 2020 • 138 Fuel-ups

  Property of mchardt

• 18.0 Avg MPG

• The Subie

  2020 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed Sedan
  Added Sep 2021 • 215 Fuel-ups

  Property of Bryguysays

• 21.4 Avg MPG

• My WRX STI

  2020 Subaru WRX STI STI 2.5L H4 GAS Manual 6 Speed
  Added Jun 2022 • 113 Fuel-ups

  Property of sdracer

• 20.0 Avg MPG

• 2020 WRX STI

  2020 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added May 2024 • 15 Fuel-ups

  Property of Pumamonster

• 15.2 Avg MPG

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