2015–2023 Ford Mustang: The Sixth Generation (S550, GT350, GT500, Bullitt, Mach 1)

Overview

The S550 Mustang went global, with independent rear suspension, turbocharged power, and a starring role in modern car culture. It’s the most advanced Mustang yet, with digital tech and world-class performance.

Generation Details

  • Years Produced: 2015–2023
  • Code Names/Nicknames: S550, GT350, GT500, Bullitt, Mach 1
  • Platform: S550

Quick Reference Chart: Sixth Generation Mustang

Model YearsBody StylesEngine Options (hp)Transmission OptionsNotable Trims/PackagesOil Capacity (qt)Trans Fluid (qt)Coolant (qt)Rear Axle (qt)
2015–2017Coupe, Convertible2.3L EcoBoost, 3.7L V6, 5.0L V86-spd, 6-spd autoEcoBoost, GT, GT3505.7–8.83.0 (MT-82/TR3160)12–151.7
2018–2023Coupe, Convertible2.3L EcoBoost, 5.0L V8, 5.2L V8 (GT350/GT500)6-spd, 10-spd auto, 7-spd DCTBullitt, Mach 1, GT5005.7–10.03.0 (MT-82/TR3160/7DCT)12–161.7

Unique Features & Options

Body Styles

  • Coupe, Convertible
  • First Mustang sold in right-hand drive

Engine & Performance

  • GT350: 5.2L flat-plane crank V8, 8,250 rpm redline
  • GT500: 760 hp, 7-speed DCT
  • Bullitt (2019–2020): Highland Green, 480 hp
  • Mach 1 (2021–2023): Track-focused, Tremec 6-speed

Notable Packages

  • EcoBoost Performance Pack: limited-slip diff, larger brakes
  • MagneRide suspension, active exhaust

Pop Culture & Movies

  • Need for Speed (2014): custom S550 Mustang

Rare & Fun Facts

  • First Mustang with factory active exhaust system
  • Digital dash can display classic Fox-body gauges
  • 2021 Mach 1 used parts from GT350 and GT500

Maintenance & Fluids Chart

Engine/TransOil Capacity (qt)Trans Fluid (qt)Coolant (qt)Rear Axle (qt)Spark Plug Gap (in)
2.3L EcoBoost5.73.0 (MT-82)121.70.028
3.7L V66.03.0 (MT-82)131.70.052
5.0L V8 (Coyote)8.83.0 (MT-82)151.70.052
5.2L V8 (GT350)10.03.0 (TR3160)161.70.052
10R80/7DCT Auto13.9 (total)

Why the S550 Mustang Still Matters

The S550 Mustang is a global performance icon, blending classic muscle with modern technology. Its special editions and advanced features make it a favorite for enthusiasts worldwide.

Download the 2015–2023 Mustang Workshop Manual

Get digital dash guides, turbo tuning, and GT500 service tips. Essential for any S550 owner or restorer.

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