The Mazda 6 III is a midsize D-segment sedan known for its sharp handling and premium feel. Technical specs include the Skyactiv engine family, six-speed transmissions, and dimensions well-suited to American highways and urban driving. In the US, gasoline-powered Skyactiv-G models dominated the lineup, with the turbocharged 2.5L becoming especially popular in later years. No diesel variants were offered in the United States.
This overview focuses on powertrains, efficiency, and key specs. Mazda 6 engines from 2012–2024 deliver a strong mix of responsive performance and respectable fuel economy. Exterior styling, cabin features, trim packages, and known issues are covered in separate articles in this series.
Engines and Transmissions
All Mazda 6 III powertrains for the US market use Skyactiv-G gasoline engines with direct injection and high compression ratios. The naturally aspirated 2.5L was the mainstay for most of the generation, while the turbocharged 2.5L (introduced in 2018) brought significantly more power. No hybrid or diesel options were available in the United States.
Engines were paired with either a six-speed manual (early models) or the smooth six-speed Skyactiv-Drive automatic. All-wheel drive (i-Activ AWD) became available on turbo models starting in 2019, though most examples sold were front-wheel drive.
| Fuel Type | Displacement | Engine Code | Horsepower | Torque | Transmission | Drivetrain | Availability (approx.) | US Market Notes |
| Premium Unleaded | 2.5 L | Skyactiv-G (non-turbo) | 184–187 hp | 185–186 lb-ft | 6-Speed Manual / 6-Speed Auto | Front-Wheel Drive | 2014–2021 | Most common engine; good balance of power and efficiency |
| Premium Unleaded | 2.5 L | Skyactiv-G Turbo | 227–250 hp | 310–320 lb-ft | 6-Speed Auto | Front-Wheel Drive / AWD (select trims) | 2018–2024 | Turbo version; requires premium fuel for full output; very popular in Sport and higher trims |
Dimensions and Weight
Dimensions remained largely consistent across the generation, with only minor revisions after facelifts (primarily suspension tuning and minor exterior changes). The sedan was the only body style offered in the US market. Weight varies depending on engine, transmission, and equipment, typically ranging from about 3,200–3,600 lbs.
| Specification | Sedan (GJ/GL) | Notes |
| Length | 192.7 in (4895 mm) | Slight variations by year |
| Width | 72.4 in (1840 mm) | Excluding mirrors |
| Height | 57.1 in (1450 mm) | Minor changes post-facelift |
| Wheelbase | 111.4 in (2830 mm) | Contributes to excellent rear legroom |
| Ground Clearance | 6.5 in (165 mm) | Real-world ~6.3–6.5 in |
| Curb Weight | 3,250–3,600 lbs (1475–1635 kg) | Depends on engine, AWD, and trim |
| Trunk Volume | 14.7 cu ft (419 L) | Class-competitive |
Model Year Updates & Facelifts
Production began in 2012 (2014 model year in the US). The 2014–2017 models featured the naturally aspirated 2.5L as the primary engine. The 2016 facelift brought updated styling, improved interior materials, and the introduction of G-Vectoring Control for better handling feel.
The major 2018 refresh (GL series) introduced the turbocharged 2.5L engine, upgraded infotainment, better sound insulation, and available AWD on turbo models. A lighter 2021 update focused on multimedia enhancements and minor tech improvements, with no major mechanical changes.
Later models (2018+) are generally considered more refined and desirable on the used market thanks to the turbo engine option, improved ride quality, and better technology.
Driving Experience & Ownership Notes
Skyactiv-G engines are known for strong reliability when properly maintained: oil changes every 5,000–7,500 miles with synthetic oil, and use of Top Tier gasoline (premium recommended for the turbo). Well-maintained examples frequently exceed 200,000 miles without major issues. The turbo 2.5 requires extra attention to cooling system health and oil quality.
Most popular configuration in the US is the naturally aspirated 2.5L with automatic transmission — it offers lively performance and reasonable fuel economy. EPA estimates (combined): ~26–28 mpg for the non-turbo 2.5L, ~23–25 mpg for the turbo (real-world figures often 1–3 mpg lower in heavy traffic or cold weather).
The Skyactiv-Drive automatic is smooth and durable with fluid changes every 40,000–60,000 miles. The manual (available early on) is crisp but rare. Front-wheel drive is standard; AWD adds traction but slightly reduces efficiency. Parts are reasonably priced and widely available — brake rotors typically $80–150 each, filters $10–25. Paint and thin clear coat can be prone to chipping and minor surface rust in regions with road salt.
Best Choice for the US Market
For most buyers on the used market, a 2018+ Mazda 6 with the turbocharged 2.5L engine, automatic transmission, and ideally AWD offers the best blend of performance, refinement, and modern features. These models remain highly sought-after and hold value well.
The naturally aspirated 2.5L versions are excellent for those prioritizing fuel economy and lower maintenance costs. When shopping, always verify service history, check for suspension wear, and inspect for any signs of rust or accident damage.
