Based on data from 19 vehicles, 1,035 fuel-ups and 236,139 miles of driving, the 1991 Ford Mustang gets a combined Avg MPG of 20.03 with a 0.32 MPG margin of error.

Any Engine Type 2.3L L4 GAS (6) 5.0L V8 GAS (11) V8 GAS (2) Any Body Style Convertible (5) Any Submodel GT (5) LX (12) Other (2)

Below you can see a distribution of the fuel-ups with 20 outliers (1.90%) removed.

Following shows the average MPG of each of the 19 vehicles in the system.

• My Mustang

  1991 Ford Mustang LX 5.0L V8 GAS Manual 5 Speed
  Added May 2020 • 149 Fuel-ups

  Property of racerbrad9

• 18.3 Avg MPG

• My Mustang

  1991 Ford Mustang LX 2.3L L4 GAS Automatic 4 Speed
  Added Aug 2023 • 6 Fuel-ups

  Property of mustangjoe50

• 15.5 Avg MPG

• Trixie

  1991 Ford Mustang GT 5.0L V8 GAS Manual 5 Speed Convertible
  Added Oct 2021 • 29 Fuel-ups

  Property of pbkl42

• 17.8 Avg MPG

• 1991 Ford Mustang

  1991 Ford Mustang GT 5.0L V8 GAS Standard 5 Speed Convertible
  Added Aug 2022 • 410 Fuel-ups

  Property of tonyzielmanski

• 13.5 Avg MPG

• Bill's Mustang LX 5.0

  1991 Ford Mustang LX 5.0L V8 GAS Automatic 4 Speed
  Added Sep 2017 • 25 Fuel-ups

  Property of Bill328d

• 14.8 Avg MPG

• The Vert

  1991 Ford Mustang LX 2.3L L4 GAS Automatic Convertible
  Added Jul 2022 • 5 Fuel-ups

  Property of JRFairchild

• 24.8 Avg MPG

• 1991 Mustang

  1991 Ford Mustang LX 2.3L L4 GAS Automatic 4 Speed Convertible
  Added Sep 2021 • 7 Fuel-ups

  Property of realestatewayne

• 20.4 Avg MPG

• Red Fox

  1991 Ford Mustang LX 5.0L V8 GAS Manual 5 Speed
  Added Apr 2020 • 14 Fuel-ups

  Property of Bssplyr4life

• 13.9 Avg MPG

• My Mustang

  1991 Ford Mustang GT 5.0L V8 GAS Standard 5 Speed
  Added May 2017 • 33 Fuel-ups

  Property of JSquared076

• 24.4 Avg MPG

• Mustang

  1991 Ford Mustang LX 2.3L L4 GAS Automatic 4 Speed Convertible
  Added Aug 2018 • 43 Fuel-ups

  Property of vman99

• 20.8 Avg MPG

• Mustang 5.0

  1991 Ford Mustang LX 5.0L V8 GAS Standard 5 Speed
  Added Aug 2016 • 12 Fuel-ups

  Property of Yaminson

• 11.4 Avg MPG

• Mustang

  1991 Ford Mustang LX 5.0L V8 GAS Standard 5 Speed
  Added Aug 2016 • 3 Fuel-ups

  Property of mykscholze

• 19.8 Avg MPG

• Mustang

  1991 Ford Mustang LX 2.3L GAS L4 Standard 5 Convertible (2 Door)
  Added Jan 2015 • 6 Fuel-ups

  Property of 5_Slow

• 26.8 Avg MPG

• Mustang 2.3

  1991 Ford Mustang LX 2.3L L4 GAS Standard 5 Speed
  Added Aug 2016 • 85 Fuel-ups

  Property of Yaminson

• 23.5 Avg MPG

• Mustang

  1991 Ford Mustang GT 5.0L V8 GAS Standard 5 Speed
  Added Mar 2017 • 19 Fuel-ups

  Property of noahb

• 13.4 Avg MPG

• My Stang

  1991 Ford Mustang GAS V8
  Added Jun 2013 • 15 Fuel-ups

  Property of Reddie1337

• 17.2 Avg MPG

• PonyExpress

  1991 Ford Mustang GAS V8
  Added Dec 2010 • 11 Fuel-ups

  Property of ponyexpress94

• 14.6 Avg MPG

• Ford Mustang

  1991 Ford Mustang GT 5.0L V8 GAS Standard 5 Speed
  Added Aug 2016 • 3 Fuel-ups

  Property of jgarling27

• 10.0 Avg MPG

• The LX

  1991 Ford Mustang LX 5.0L V8 GAS Automatic 4 Speed
  Added Oct 2016 • 731 Fuel-ups

  Property of Paul_Keidel

• 23.0 Avg MPG