The 2016 Subaru Forester with the 2.5L four-cylinder engine (FB25BA 5) relies on precise fluid specifications to maintain performance and longevity. Because this engine requires synthetic oil and utilizes a continuously variable transmission (CVT) that is sensitive to fluid friction properties, using the wrong lubricant can lead to premature wear or reduced fuel efficiency. Proper maintenance ensures the vehicle handles varying climates effectively while protecting critical components like the turbocharger, transmission gears, and cooling system.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – Provides unmatched engine protection against horsepower loss and wear, allowing for extended drain intervals up to 25,000 miles in severe service conditions.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – Offers 37% more cleaning power than the OE version and guarantees 20,000 miles of protection while resisting Low-Speed Pre-Ignition.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – A cost-effective option that fights sludge and deposits with a 100% synthetic formulation designed to outperform conventional oils.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Formulated with boosted detergents and reduced sludge additives specifically for engines with over 75,000 miles to improve performance.
- AMSOIL Oil Filter – Features a 99% filtration efficiency at 20 microns and a higher capacity for contaminants to help extend engine life.
- WIX Oil Filter – Offers premium media that improves upon original equipment manufacturer filters for reliable protection during oil changes.
- WIX Air Filter – Provides premium filtration to ensure the engine receives clean air for optimal combustion and efficiency.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – An ethylene glycol pre-mix with OAT formulation that protects all cooling system metals and hoses for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated alternative that requires mixing with distilled water, offering superior corrosion and erosion protection for heavy-duty or high-mileage applications.
- AMSOIL 100% Synthetic CVT Fluid – Delivers exceptional metal-to-metal frictional properties essential for the Subaru CVT transmission to shift smoothly and operate efficiently.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – The recommended fluid for the differential and manual transmission, containing friction modifiers for limited-slip applications and controlling thermal runaway.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Provides stable viscosity over a wide temperature range for excellent ABS responsiveness and braking safety.
Selecting the correct fluid for the 2016 Subaru Forester’s 2.5L FB25BA 5 engine is critical because this vehicle is designed to operate in diverse conditions, from snowy winters to hot summer days. The engine requires a specific 0W-20 viscosity to ensure proper oil flow during cold starts and to maintain adequate film strength at operating temperatures. Using a synthetic option ensures that the oil resists breakdown longer than conventional oils, which is particularly beneficial if the vehicle is driven in severe conditions such as short trips, stop-and-go traffic, or extreme temperatures. The recommended capacity for an oil change, including the AMSOIL Oil Filter, is 5.1 quarts. It is vital to torque the oil drain plug to 31 ft/lbs and install a new washer on the drain bolt to prevent leaks. Additionally, the oil vapor filter is a component that requires monitoring during service intervals, although specific replacement products were not listed in the primary selection.
Beyond the engine, the 2016 Forester’s transmission system demands specialized attention. The vehicle utilizes a Continuously Variable Transmission (CVT), which relies heavily on the specific frictional properties of the fluid to function correctly. The recommended AMSOIL 100% Synthetic CVT Fluid is engineered to provide the exact friction coefficients the transmission requires, ensuring smooth operation and preventing premature wear. The total fill capacity for the CVT is 13.4 quarts. For manual transmission variants, the system requires 7 pints of GL-5 SAE 75W-90 gear lube, with a drain plug torque of 52 ft/lbs. Proper gear lubrication in the front and rear differentials is equally important. The rear differential, for instance, requires 1.7 pints of gear lube. Using the recommended AMSOIL SEVERE GEAR® 75W-90 or AMSOIL SEVERE GEAR® 75W-110 synthetic gear lubes helps control operating temperatures and prevents rust and corrosion, extending the life of the gears and bearings.
Cooling system integrity is another pillar of maintaining the 2016 Subaru Forester. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant capacity varies depending on the specific configuration, with the MTXL system requiring 7.8 quarts and the CVT requiring 8 quarts of AMSOIL Propylene Glycol Antifreeze. Maintaining the correct antifreeze mixture prevents overheating and protects metal components from corrosion. AMSOIL Antifreeze and Engine Coolant offers a unique poly-organic acid (OAT) formulation that is compatible with all cooling system metals, gaskets, and hoses. This formulation is phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free, ensuring it does not deplete silicates or borates that might be present in the system. For those who prefer a concentrated option, the Propylene Glycol Antifreeze offers extended service life up to 150,000 miles or five years. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is another often-overlooked fluid that plays a massive role in safety. The 2016 Forester requires DOT 3 hydraulic brake fluid. AMSOIL’s 100% Synthetic Brake Fluid maintains stable viscosity in both extreme heat and cold, ensuring reliable braking performance and ABS responsiveness, which is crucial for the vehicle’s stability control systems.
About the Vehicle
The 2016 Subaru Forester is a compact SUV that has long been recognized for its versatility and capability in various weather conditions. This model is part of the fourth generation of the Forester lineup, which has established a strong reputation for combining the practicality of a crossover with the all-wheel-drive confidence that Subaru is famous for. The 2.5L four-cylinder engine in this specific configuration, identified by the engine code FB25BA 5, is designed to provide a balance of fuel economy and adequate power for daily driving, light towing, and off-road adventures. The FB series engines are known for their boxer layout, which lowers the vehicle’s center of gravity for improved handling and stability on the road.
Owners of the 2016 Forester often value its spacious interior, which offers a high seating position and excellent visibility, making it a popular choice for families and outdoor enthusiasts alike. The vehicle’s all-wheel-drive system works automatically to distribute power to the wheels with the most traction, providing confidence during rainy days or when encountering light snow. While the 2.5L engine is not a high-performance turbo unit in this specific configuration, it is robust enough to handle the weight of the vehicle and its cargo without struggling. The platform it sits on is known for reliability and longevity, provided that regular maintenance is performed according to the manufacturer’s schedule. This includes timely oil changes, transmission fluid checks, and coolant flushes to keep the cooling and drivetrain systems in peak condition. The Forester’s market position as a practical, safe, and capable family vehicle continues to make it a staple in the compact SUV segment, appealing to those who prioritize utility and all-weather capability over sporty driving dynamics.
For those looking to enhance the performance and longevity of their 2016 Subaru Forester, adding fuel system care products can yield significant results. The AMSOIL P.i.® AMSOIL P.i. Performance Improver is designed to clean fuel injectors, particularly GDI (Gasoline Direct Injection) types, restoring them to 100% flow rate. This can help restore up to 14% of lost horsepower and improve fuel economy, reducing the need for higher-octane fuel. It also helps prevent carbon rap and controls pre-ignition knock, ensuring the engine runs smoothly. For seasonal storage, products like the AMSOIL AMSOIL Gasoline Stabilizer can keep fuel fresh for up to 12 months, protecting against varnish and gum buildup caused by ethanol corrosion. These additives work synergistically with the recommended oils and filters to provide comprehensive protection for the vehicle, ensuring that every component from the fuel system to the drivetrain operates at its best.