The 2015 Subaru Forester represents a significant moment in the crossover's history, marking the transition to a more refined platform while retaining the brand's signature symmetrical all-wheel drive. This model year offered buyers a blend of proven reliability, enhanced safety features, and a more composed driving dynamics compared to its predecessor. Understanding the engineering behind its powertrain is essential for appreciating the vehicle's overall capability and enduring appeal in the compact SUV market.
Overview of the 2015 Model Year
For the 2015 model year, Subaru implemented a mid-cycle refresh for the Forester, which included subtle exterior updates and meaningful interior upgrades. The core identity of the vehicle, however, remained rooted in its horizontally-opposed "Boxer" engine and standard symmetrical all-wheel drive. This commitment to its core mechanical philosophy ensured the Forester continued to deliver confident handling and superior traction in various weather conditions, a key reason for its popularity among outdoor enthusiasts and safety-conscious families.
The Heart of the Vehicle: The 2.5L SUBARU BOXER Engine
The primary powertrain option for the 2015 Forester is the 2.5-liter horizontally-opposed four-cylinder engine, commonly known as the SUBARU BOXER. This unique engine design positions the cylinders flat on either side of the engine, creating a low center of gravity that contributes directly to the vehicle's stable and planted driving feel. The boxer configuration also results in smoother operation due to the opposing motion of the pistons, which helps to cancel out inertial forces that cause vibration.
Performance and Efficiency Specifications
Producing 170 horsepower and 166 lb-ft of torque, the 2.5L engine provides more than enough power for everyday driving needs, including highway merging and passing. While not a performance machine, the power delivery is linear and responsive, particularly when paired with the continuously variable transmission (CVT). The design also contributes to improved fuel economy, with the EPA estimating up to 26 MPG in the city and 33 MPG on the highway for the base model, making it a practical choice for daily commutes and long-distance travel alike.
Integration with the Symmetrical All-Wheel Drive System
The true magic of the 2015 Forester lies in the synergy between the BOXER engine and the symmetrical all-wheel drive system. Unlike systems that primarily send power to the front wheels, Subaru's design distributes power front-to-rear and side-to-side based on traction demands. This means the engine's power is sent efficiently to the wheels that need it most, whether navigating snowy backroads or tackling loose gravel trails. The system is engineered to be passive during normal driving, reducing drag and improving fuel efficiency, while actively engaging to provide stability when needed.
Handling and Driving Dynamics
Drivers will immediately notice the difference in handling compared to traditional front-wheel-drive crossovers. The placement of the engine and the balanced weight distribution inherent to the Boxer design result in a lower polar of inertia, which allows the vehicle to change direction more quickly and smoothly. This translates to a more engaging and less wallowy driving experience, where the Forester feels connected to the road and inspires confidence in cornering and evasive maneuvers.
Reliability, Maintenance, and Ownership Costs
Subaru has built a reputation for engineering vehicles that are built to last, and the 2015 Forester is no exception. The horizontally-opposed engine design is inherently strong due to its low profile and smooth operation, which places less stress on internal components compared to vertical moving parts. Regular maintenance, including timely oil changes and fluid checks, is crucial for ensuring the longevity of the engine and the entire drivetrain, but owners can generally expect years of dependable service from this powertrain.
