The Mazda 6 III Sedan, specifically the facelifted model released in 2018, represented a significant evolution of Mazda’s mid-size offering. This generation, known internally as the GJ platform, aimed to blend stylish design with engaging driving dynamics and improved fuel efficiency. The 2.5-liter SKYACTIV-G variant, producing 187 horsepower and paired with a six-speed automatic transmission, occupied a sweet spot in the lineup, offering a balance of performance and practicality for the North American market. Production of this configuration began in 2018 and continued through subsequent model years with minor revisions.
Technical Specifications
| Brand | Mazda |
| Model | 6 |
| Generation | 6 III Sedan (GJ, facelift 2018) |
| Type (Engine) | 2.5 SKYACTIV-G (187 Hp) Automatic |
| Start of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 9 l/100 km (26.1 US mpg) |
| Fuel consumption (extra urban) | 6.7 l/100 km (35.1 US mpg) |
| Fuel consumption (combined) | 8.1 l/100 km (29 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.3 kg/Hp |
| Weight-to-torque ratio | 6.2 kg/Nm |
| Power | 187 Hp @ 6000 rpm |
| Power per litre | 75.2 Hp/l |
| Torque | 252 Nm @ 4000 rpm (185.87 lb.-ft. @ 4000 rpm) |
| Maximum engine speed | 6500 rpm |
| Engine layout | Front, Transverse |
| Engine Model/Code | PYY1 |
| Engine displacement | 2488 cm3 (151.83 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 89 mm (3.5 in.) |
| Piston Stroke | 100 mm (3.94 in.) |
| Compression ratio | 13:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC-VVT |
| Engine oil capacity | 4.5 l (4.76 US qt | 3.96 UK qt) |
| Coolant capacity | 7.2 l (7.61 US qt | 6.34 UK qt) |
| Kerb Weight | 1554 kg (3425.98 lbs.) |
| Trunk (boot) space (minimum) | 416 l (14.69 cu. ft.) |
| Fuel tank capacity | 62 l (16.38 US gal | 13.64 UK gal) |
| Length | 4895 mm (192.72 in.) |
| Width | 1839 mm (72.4 in.) |
| Height | 1450 mm (57.09 in.) |
| Wheelbase | 2830 mm (111.42 in.) |
| Front track | 1585-1595 mm (62.4 – 62.8 in.) |
| Rear track | 1575-1585 mm (62.01 – 62.4 in.) |
| Ride height (ground clearance) | 165 mm (6.5 in.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 6 |
| Gearbox type | Automatic transmission |
| Front suspension | Independent, McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link with stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Steering type | Steering rack and pinion |
| Power steering | Electric |
| Tires size | 225/55 R17; 225/45 R19 |
| Wheel rims size | 7.5J x 17; 7.5J x 19 |
INTRODUCTION
The 2018 Mazda 6 facelift brought a refreshed aesthetic and subtle mechanical improvements to the GJ series. Positioned as a mid-range offering, the 2.5-liter SKYACTIV-G with the six-speed automatic transmission aimed to appeal to buyers seeking a more refined and powerful experience than the base 2.0-liter engine, without the added cost and sportier focus of the turbocharged variants available in some markets. This configuration was particularly popular in North America, where larger displacement engines were traditionally favored. The facelift included revised styling cues, enhanced interior materials, and updated safety technology, further solidifying the Mazda 6’s reputation as a compelling alternative to mainstream competitors like the Honda Accord and Toyota Camry.
Powertrain & Engine Architecture
At the heart of this Mazda 6 variant lies the PYY1 engine code, a 2.5-liter inline-four cylinder gasoline engine belonging to Mazda’s SKYACTIV-G family. This engine is characterized by its high compression ratio of 13:1, achieved through careful engineering and optimized combustion chamber design. It utilizes direct fuel injection, delivering fuel directly into the cylinders for improved efficiency and power. The engine employs a dual overhead camshaft (DOHC) valvetrain with variable valve timing (VVT) on both intake and exhaust camshafts, allowing for optimized engine performance across a wider range of engine speeds. The six-speed automatic transmission, a key component of this configuration, is designed for smooth and responsive shifting. It features a torque converter and utilizes electronically controlled hydraulic circuits for gear selection. The transmission’s gear ratios are tuned to balance acceleration and fuel economy, prioritizing comfortable cruising rather than outright performance.
Driving Characteristics
The 187 horsepower and 185.87 lb-ft of torque produced by the 2.5-liter engine, when coupled with the six-speed automatic, provided a comfortable and capable driving experience. Acceleration was adequate for everyday driving situations, with a 0-60 mph time estimated around 7.5-8.0 seconds. While not as quick as the turbocharged models or those equipped with a manual transmission, the automatic offered seamless gear changes and a relaxed driving feel. The automatic transmission’s programming prioritized fuel efficiency, resulting in slightly slower shifts compared to more performance-oriented setups. The gear ratios were spaced to provide good low-end torque for city driving and sufficient power for highway passing maneuvers. Compared to the base 2.0-liter engine, the 2.5-liter offered a noticeable improvement in responsiveness and overall power delivery.
Equipment & Trim Levels
The 2.5-liter automatic variant of the 2018 Mazda 6 typically came standard with a generous array of features. These included automatic climate control, a touchscreen infotainment system with Bluetooth connectivity, a rearview camera, and a suite of safety features such as ABS, stability control, and multiple airbags. Higher trim levels, such as the Grand Touring and Signature, added features like leather upholstery, a premium sound system, navigation, adaptive cruise control, and lane departure warning. Interior upholstery generally consisted of cloth on lower trims, with leather options available on higher-end models. Dashboard configurations were consistent across the range, featuring a clean and modern design with a focus on driver ergonomics.
Chassis & Braking
The Mazda 6’s chassis was designed to provide a balance of comfort and handling. The front suspension utilized an independent McPherson strut setup with coil springs and an anti-roll bar, while the rear suspension employed an independent multi-link configuration with a stabilizer bar. This setup provided a comfortable ride while maintaining good body control during cornering. Braking duties were handled by ventilated discs at the front and solid discs at the rear. ABS (Anti-lock Braking System) was standard, enhancing braking performance and stability in emergency situations. The steering system was a rack-and-pinion setup with electric power steering, providing precise and responsive steering feel.
Market Reception & Comparison
Critics generally praised the 2018 Mazda 6 for its stylish design, refined interior, and engaging driving dynamics. The 2.5-liter engine and automatic transmission combination received positive reviews for its smooth operation and adequate performance. Fuel economy was considered competitive within its class, averaging around 29 mpg combined. Compared to the base 2.0-liter engine, the 2.5-liter offered a significant improvement in performance, making it a more appealing option for drivers who prioritized power and responsiveness. However, some reviewers noted that the automatic transmission could feel slightly hesitant at times, and that the turbocharged variants offered a more exhilarating driving experience. Reliability reports generally indicated good long-term dependability for the SKYACTIV-G engine and automatic transmission.
Legacy
The 2.5-liter SKYACTIV-G engine paired with the six-speed automatic transmission proved to be a reliable and durable powertrain in the Mazda 6. These models have maintained relatively strong resale values in the used car market, reflecting their reputation for quality and dependability. While not the most powerful or sporty variant of the Mazda 6, this configuration offered a compelling blend of performance, efficiency, and comfort, making it a popular choice among buyers seeking a well-rounded mid-size sedan. Common maintenance items include routine oil changes, air filter replacements, and occasional transmission fluid services. Overall, the 2018 Mazda 6 2.5 SKYACTIV-G Automatic remains a viable and attractive option for used car buyers seeking a stylish, reliable, and enjoyable driving experience.
