The 2014 Subaru OUTBACK equipped with the 3.6L 6-cylinder engine (Engine Code EZ36D D) requires precise lubrication to maintain its balance of power and reliability. Proper fluids are essential for protecting this horizontally opposed engine against wear, ensuring smooth shifts in the automatic transmission, and maintaining performance in extreme temperatures. By selecting high-quality lubricants specifically designed for this platform, owners can extend the service intervals between maintenance and safeguard their vehicle against the stress of daily driving, towing, or harsh winter conditions. The following guide details the optimal AMSOIL products and specific capacities needed to keep your OUTBACK operating at peak efficiency.
Recommended AMSOIL Products
To ensure your 2014 Subaru OUTBACK receives the best protection possible, we have identified the top-tier synthetic lubricants that meet or exceed the manufacturer’s stringent requirements. The following list includes the recommended motor oils, filters, and essential fluids for a complete maintenance regimen.
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – This top-tier oil provides unsurpassed engine protection and is guaranteed for up to 25,000 miles or one year. It offers 75% more protection against horsepower loss and wear, making it ideal for those seeking maximum performance and extended service intervals.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Designed to deliver up to 20,000 miles of protection, this oil features 37% more cleaning power to help keep your engine running smoother for longer. It is an excellent choice for maintaining engine cleanliness while offering reliable protection.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A cost-effective option that outperforms conventional oils. This formulation fights sludge and deposits effectively and is trusted by professional engine builders for its reliability and protection.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically formulated for vehicles with over 75,000 miles, this oil contains enhanced anti-wear additives and boosted detergents to reduce sludge and help older engines perform better.
- AMSOIL Oil Filter – This filter provides a filtering efficiency of 99 percent at 20 microns, allowing for lower restriction and better lubrication of engine parts. It offers greater capacity for contaminants than competing filters to reduce engine wear.
- WIX Oil Filter – A premium media alternative to OEM filters.
- WIX Air Filter – Ensures the engine receives clean air for optimal combustion.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mix formulation that protects all cooling system metals, gaskets, and hoses. It is engineered to exceed original equipment manufacturer requirements and offers protection for up to 150,000 miles or 5 years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option that offers superior corrosion protection and extended service intervals.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Withstands the rigors of heavy towing, elevated temperatures, and challenging terrain. It remains fluid in sub-zero temperatures, ensuring smooth, shudder-free shifts and reliable performance in any condition.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – A cost-effective alternative that provides excellent protection against wear and sludge.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Ideal for the front and rear differentials, this lube contains friction modifiers for limited-slip applications. It controls thermal runaway, protects against rust and corrosion, and helps reduce operating temperatures.
- AMSOIL 75W-90 Long Life 100% Synthetic Gear Lube – Designed for extended service intervals with improved efficiency and seal life.
- AMSOIL SEVERE GEAR® 75W-110 100% Synthetic Gear Lube – Provides advanced protection against wear for demanding applications.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – A versatile option for various gear applications.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Offers excellent responsiveness and stable viscosity over a wide temperature range.
Performing maintenance on the 2014 Subaru OUTBACK requires attention to specific fluid capacities and torque specifications to ensure the longevity of your powertrain. For the engine oil, the 3.6L EZ36D D engine requires a total of 6.9 quarts when the oil filter is also replaced. When adding oil, it is crucial to use an oil filter that can handle the demands of this high-output engine, such as the AMSOIL Oil Filter with part number EA15K20-EA. For those who prefer a trusted aftermarket brand, the WIX Oil Filter (51334-EA) is also a recommended alternative. Remember to install a new washer on the drain bolt and torque the oil drain plug to 33 ft/lbs to prevent leaks and ensure a secure fit. After refilling, always check the oil level to confirm it is within the safe operating range.
Beyond the engine, the cooling system plays a vital role in the OUTBACK’s reliability, especially given the Subaru’s flat-four and flat-six engine layouts which are sensitive to overheating. The coolant capacity for the radiator and overflow reservoir is 6.9 quarts. AMSOIL offers both a pre-mixed ethylene glycol formula, the Passenger Car & Light Truck Antifreeze & Coolant (ANTPC1G-EA), for ease of use and a concentrated propylene glycol option, the Propylene Glycol Antifreeze and Engine Coolant (ANT1G-EA), for those who prefer to mix their own. Both formulations provide superior corrosion protection and are phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free, ensuring compatibility with all cooling system metals and hoses.
Transmission maintenance is equally critical for this vehicle. The automatic transmission (TG5D8) requires a total fill of 10.4 quarts to ensure proper hydraulic pressure and gear actuation. Using a premium synthetic transmission fluid is highly recommended over conventional options to prevent shudder and ensure smooth engagement. The AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid or the OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid are both suitable choices that resist sludge formation and promote smooth shifts. For those with older vehicles or specific needs, the OE fluid offers excellent value while still providing top-tier protection against wear and corrosion.
The 2014 OUTBACK features a full-time all-wheel-drive system that relies heavily on the proper viscosity of gear lube in both the front and rear differentials. The front differential (GL-5) has a capacity of 3 pints and requires a 75W-90 gear lube. The rear differential (GL-5) has a slightly smaller capacity of 1.7 pints, also requiring 75W-90 viscosity. AMSOIL SEVERE GEAR® 75W-90 is an excellent choice here, providing advanced protection against wear and rust. For those interested in even longer service intervals, the 75W-90 Long Life Gear Lube is available, designed for high-load gear and bearing protection with improved seal life. Additionally, the SEVERE GEAR® 75W-110 and 80W-90 options are available if specific applications call for different viscosities, though 75W-90 is the primary recommendation for this model year. The front final drive is designed for automatic transmission only, so ensuring the correct fluid is used is paramount for the longevity of the transfer case and drive system.
In addition to major fluid changes, other critical fluids should not be overlooked. The hydraulic brake system requires a DOT 3 fluid that can handle the demands of modern ABS and traction control systems. AMSOIL’s 100% Synthetic DOT 3 and DOT 4 100% Synthetic Brake Fluid (BFLVCN-EA) offers excellent responsiveness and stable viscosity over a wide temperature range, ensuring safe stopping power in both hot and cold conditions. For power steering, the system is compatible with DEXRON-III automatic transmission fluid, meaning your transmission fluid can often double as power steering fluid, streamlining your maintenance inventory. Finally, for seasonal storage or to prevent fuel degradation, the AMSOIL Gasoline Stabilizer can keep fuel fresh for up to 12 months, protecting against varnish, gum, and ethanol corrosion. Additionally, the WIX Cabin Air Filters ensure clean air for the cabin, while WIX Fuel Filters help maintain fuel system integrity.
About the Vehicle
The 2014 Subaru OUTBACK represents the fifth generation of this iconic wagon, a vehicle that has long stood out in the crossover and utility segment for its blend of rugged capability and everyday practicality. Powered by the naturally aspirated 3.6-liter EZ36D D flat-six engine, this model produces robust horsepower and torque, providing a smooth and confident driving experience that belies its utility origins. The engine’s horizontally opposed configuration not only lowers the vehicle’s center of gravity for enhanced handling but also contributes to the balanced ride quality that Subaru enthusiasts cherish.
Subaru’s reputation for all-wheel drive is well-deserved, and the OUTBACK is equipped with a full-time AWD system that automatically distributes power to the wheels with the most traction. This system, paired with a competent suspension setup, allows the vehicle to handle various road conditions, from snowy mountain passes to wet city streets with ease. The interior of the 2014 model is spacious, offering generous cargo room thanks to the wagon body style, which has remained a staple of the OUTBACK lineup. The platform also features a high level of standard safety equipment, contributing to its status as a favorite among families and outdoor adventurers who prioritize safety and reliability. While the 3.6L engine requires specific lubrication to manage the heat generated by the flat-six design, following the correct maintenance schedules with premium synthetic fluids ensures this vehicle remains a durable and reliable companion for years of service.