Based on data from 89 vehicles, 7,565 fuel-ups and 1,768,308 miles of driving, the 2015 Subaru WRX STI gets a combined Avg MPG of 18.87 with a 0.08 MPG margin of error.

Any Engine Type 2.5L H4 GAS (86) H4 GAS (2) Any Body Style Sedan (27) Any Submodel Launch Edition (18) Limited (28) Base (40) Other (3)

Below you can see a distribution of the fuel-ups with 122 outliers (1.59%) removed.

Following shows the average MPG of each of the 89 vehicles in the system.

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• STI

  2015 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed Sedan
  Added Jun 2015 • 207 Fuel-ups

  Property of DK427

• 17.3 Avg MPG

• My WRX STI

  2015 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed
  Added Mar 2020 • 7 Fuel-ups

  Property of DarthColin

• 21.2 Avg MPG

• STI

  2015 Subaru WRX STI Launch Edition 2.5L H4 GAS Manual 6 Speed
  Added May 2014 • 326 Fuel-ups

  Property of iainb

• 18.7 Avg MPG

• My STI

  2015 Subaru WRX STI Launch Edition 2.5L H4 GAS Manual 6 Speed Sedan
  Added May 2014 • 58 Fuel-ups

  Property of arunkv

• 17.4 Avg MPG

• My WRX STI

  2015 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Jul 2020 • 14 Fuel-ups

  Property of scoobyct

• 19.2 Avg MPG

• STI

  2015 Subaru WRX STI Launch Edition 2.5L H4 GAS Manual 6 Speed Sedan
  Added Mar 2020 • 39 Fuel-ups

  Property of jinpnw

• 20.5 Avg MPG

• My WRX STI

  2015 Subaru WRX STI Limited 2.5L H4 GAS Standard 6 Speed Sedan
  Added Dec 2015 • 218 Fuel-ups

  Property of PsychoGTI

• 18.0 Avg MPG

• My WRX STI

  2015 Subaru WRX STI Launch Edition 2.5L H4 GAS Manual 6 Speed
  Added Jan 2018 • 135 Fuel-ups

  Property of Nightdown

• 17.3 Avg MPG

• WRX STI

  2015 Subaru WRX STI Limited 2.5L H4 GAS Manual 6 Speed
  Added Sep 2016 • 118 Fuel-ups

  Property of Pops1958

• 17.0 Avg MPG

• 2015 Subaru WRX STi

  2015 Subaru WRX STI 2.5L H4 GAS Manual 6 Speed Sedan
  Added Jun 2015 • 95 Fuel-ups

  Property of jon9090

• 19.7 Avg MPG

• My WRX STI

  2015 Subaru WRX STI 2.5L H4 GAS Standard 6 Speed
  Added Feb 2018 • 39 Fuel-ups

  Property of SAM_i_AM

• 18.3 Avg MPG

• Subaru WRX STI Launch Edition

  2015 Subaru WRX STI Launch Edition 2.5L H4 GAS Standard 6 Speed
  Added Jun 2016 • 67 Fuel-ups

  Property of giancarlolugo

• 20.0 Avg MPG

• Subaru WRX STi

  2015 Subaru WRX STI Limited 2.5L H4 GAS Standard 6 Speed Sedan
  Added Apr 2018 • 226 Fuel-ups

  Property of adampetrasek

• 17.2 Avg MPG

• My WRX STI

  2015 Subaru WRX STI Limited 2.5L H4 GAS Standard 6 Speed
  Added May 2016 • 151 Fuel-ups

  Property of djurma

• 16.8 Avg MPG

• _Blue Demon_sold

  2015 Subaru WRX STI Launch Edition 2.5L H4 GAS Manual 6 Speed
  Added Jul 2015 • 146 Fuel-ups

  Property of Trickyd024

• 19.7 Avg MPG

• My WRX STI

  2015 Subaru WRX STI Limited 2.5L H4 GAS Standard 6 Speed
  Added Jun 2018 • 10 Fuel-ups

  Property of msalas

• 17.6 Avg MPG

• Suzi

  2015 Subaru WRX STI Limited 2.5L H4 GAS Standard 6 Speed Sedan
  Added Nov 2018 • 57 Fuel-ups

  Property of iDashX

• 18.5 Avg MPG

• Subaru WRX STi

  2015 Subaru WRX STI 2.5L H4 GAS Standard 6 Speed
  Added Feb 2018 • 151 Fuel-ups

  Property of Richie669

• 23.6 Avg MPG

• My WRX STI

  2015 Subaru WRX STI 2.5L H4 GAS Standard 6 Speed
  Added Jun 2018 • 8 Fuel-ups

  Property of eddiebor

• 17.6 Avg MPG

• Sti

  2015 Subaru WRX STI Limited 2.5L H4 GAS Standard 6 Speed Sedan
  Added Apr 2018 • 64 Fuel-ups

  Property of Albertpender

• 13.7 Avg MPG

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