Based on data from 85 vehicles, 4,147 fuel-ups and 938,150 miles of driving, the 1999 Ford Mustang gets a combined Avg MPG of 19.42 with a 0.15 MPG margin of error.

Any Engine Type 3.8L V6 GAS (24) 4.6L V8 GAS (45) V6 GAS (8) V8 GAS (7) Any Body Style Coupe (20) Convertible (6) Any Submodel SVT Cobra (11) Base (24) GT (34) Other (16)

Below you can see a distribution of the fuel-ups with 77 outliers (1.82%) removed.

Following shows the average MPG of each of the 85 vehicles in the system.

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• My Mustang

  1999 Ford Mustang GT 4.6L V8 GAS Manual 5 Speed
  Added Jan 2020 • 142 Fuel-ups

  Property of tlc1975sapper

• 18.1 Avg MPG

• Bananer

  1999 Ford Mustang GT 4.6L V8 GAS Manual 5 Speed
  Added Jan 2023 • 19 Fuel-ups

  Property of slamdry

• 15.2 Avg MPG

• Saleen

  1999 Ford Mustang GT 4.6L V8 GAS Standard 5 Speed
  Added Aug 2016 • 63 Fuel-ups

  Property of Guggy27

• 15.3 Avg MPG

• Mustang

  1999 Ford Mustang GT 4.6L V8 GAS Standard 5 Speed Convertible
  Added Jan 2021 • 44 Fuel-ups

  Property of smsavage99

• 15.6 Avg MPG

• Kevin /Sport

  1999 Ford Mustang GT 4.6L V8 GAS Standard 5 Speed Coupe
  Added Oct 2017 • 129 Fuel-ups

  Property of 4Mycars

• 17.5 Avg MPG

• My Mustang

  1999 Ford Mustang GT 4.6L V8 GAS Automatic 4 Speed
  Added Mar 2022 • 54 Fuel-ups

  Property of mdelwiche

• 18.1 Avg MPG

• 1999 Ford Mustang GT

  1999 Ford Mustang GT 4.6L V8 GAS Automatic 4 Speed Convertible
  Added Nov 2025 • 55 Fuel-ups

  Property of gcburn

• 18.4 Avg MPG

• Mustang

  1999 Ford Mustang GT 4.6L V8 GAS Manual 5 Speed Convertible
  Added Nov 2019 • 59 Fuel-ups

  Property of dlooney

• 21.8 Avg MPG

• 1999 Ford Mustang GT

  1999 Ford Mustang GT 4.6L V8 GAS Manual 5 Speed
  Added Feb 2020 • 20 Fuel-ups

  Property of danielschmidt

• 18.1 Avg MPG

• The Pony

  1999 Ford Mustang 3.8L V6 GAS Automatic 4 Speed Coupe
  Added May 2019 • 65 Fuel-ups

  Property of zcruzen

• 21.4 Avg MPG

• My Mustang

  1999 Ford Mustang GT 4.6L V8 GAS Manual 5 Speed
  Added Jul 2025 • 10 Fuel-ups

  Property of itsshelby98

• 21.0 Avg MPG

• The Mustang

  1999 Ford Mustang GT 4.6L V8 GAS Manual 5 Speed
  Added Dec 2019 • 103 Fuel-ups

  Property of Matta

• 21.5 Avg MPG

• Ford Mustang

  1999 Ford Mustang GT 4.6L V8 GAS Manual 5 Speed Coupe
  Added May 2022 • 59 Fuel-ups

  Property of Vdub085

• 14.4 Avg MPG

• Misty

  1999 Ford Mustang 3.8L V6 GAS Standard 5 Speed Coupe
  Added Jun 2018 • 15 Fuel-ups

  Property of AnnaMold

• 19.5 Avg MPG

• My Mustang

  1999 Ford Mustang GT 4.6L V8 GAS Manual 5 Speed
  Added Sep 2024 • 3 Fuel-ups

  Property of Dylant10

• 13.5 Avg MPG

• SLOWBRA

  1999 Ford Mustang SVT Cobra 4.6L V8 GAS Manual 5 Speed Coupe
  Added Apr 2014 • 153 Fuel-ups

  Property of Lexworth

• 14.8 Avg MPG

• My Mustang Ruby

  1999 Ford Mustang GT 4.6L V8 GAS Automatic 4 Speed
  Added Apr 2024 • 5 Fuel-ups

  Property of Mikeydude

• 22.0 Avg MPG

• Mustang

  1999 Ford Mustang SVT Cobra 4.6L V8 GAS Manual 5 Speed Coupe
  Added Oct 2019 • 12 Fuel-ups

  Property of jjpsoccer

• 17.1 Avg MPG

• 1999 Mustang

  1999 Ford Mustang 3.8L V6 GAS
  Added Apr 2018 • 111 Fuel-ups

  Property of cmore

• 28.6 Avg MPG

• The Pony

  1999 Ford Mustang 3.8L V6 GAS Automatic 4 Speed Coupe
  Added Nov 2025 • 41 Fuel-ups

  Property of zcruzen

• 22.0 Avg MPG

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