Keeping your 2016 Subaru Outback running smoothly requires more than just a routine checkup; it demands the use of the correct lubricants designed for its specific engineering. The 2.5-liter FB25 engine, a flat-four powerhouse known for its reliability and fuel efficiency, operates under conditions that can vary from daily city commuting to rugged off-road adventures. To maintain peak performance and extend the vehicle’s lifespan, owners must prioritize using high-quality synthetic fluids that meet the rigorous demands of Subaru’s drivetrain. This guide breaks down the essential lubricants, including the precise capacities and product codes needed to ensure your Subaru receives the best protection possible.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – The top-tier choice offering 75% more engine protection against horsepower loss and wear, with guaranteed protection for up to 25,000 miles or one year.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – Provides extended service intervals with 37% more cleaning power and 20,000 miles of guaranteed protection between changes.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – A cost-effective option that fights sludge and deposits, specifically engineered to protect turbochargers and meet OEM standards.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Designed for vehicles with over 75,000 miles, featuring boosted detergents and reduced sludge to help older engines perform better.
- AMSOIL Oil Filter EA15K13 – Offers 99% filtering efficiency at 20 microns, providing greater capacity for contaminants and helping reduce engine wear compared to competing filters.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique poly-organic acid (OAT) formulation providing protection for up to 150,000 miles or five years, compatible with all cooling system metals.
- AMSOIL 100% Synthetic CVT Fluid – Delivers exceptional metal-to-metal frictional properties to protect the continuously variable transmission from wear in severe driving conditions.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Advanced protection against wear and rust, ideal for differentials requiring GL-5 specifications with improved thermal runaway control.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Ensures excellent ABS and traction-control responsiveness with stable viscosity over a wide temperature range.
The heart of the 2016 Subaru Outback is its 2.5-liter FB25 engine. Subaru specifies a 0W-20 viscosity grade for optimal fuel economy and cold-start protection. Synthetic oils are not just a recommendation for this engine; they are effectively required to meet the manufacturer’s performance expectations. AMSOIL Signature Series 0W-20, Extended-Life, and OE Motor Oil meet or exceed all relevant API and ILSAC standards, ensuring that your engine remains lubricated against high temperatures and low-speed pre-ignition (LSPI), a common concern in modern direct-injection engines.
Engine Oil and Filter Specifications
When performing an oil change on your Outback, the total system capacity, including the filter, is 5.1 quarts. It is critical to adhere to this amount to ensure proper oil levels and lubrication of all moving parts. After refilling, always check the oil level to confirm accuracy. The drain plug should be torqued to 31 ft/lbs, and a new washer must be installed on the drain bolt to prevent leaks. Using a high-quality oil filter is just as important as the oil itself. The AMSOIL Oil Filter (EA15K13) is constructed to allow lower restriction, keeping engine parts lubricated during startup and providing superior filtration efficiency. For those who prefer an aftermarket alternative, the WIX Oil Filter (57055) is also a solid option known for premium media that improves upon OEM standards.
Transmission and Drivetrain Lubricants
The 2016 Outback utilizes a Continuously Variable Transmission (CVT) that demands specific fluid characteristics to operate smoothly. For the automatic transmission, the total fill capacity for the TR580 series is 12 quarts. Standard fluids can degrade over time, leading to sludge buildup and wear. AMSOIL 100% Synthetic CVT Fluid is formulated to provide exceptional metal-to-metal frictional properties, protecting the transmission even under severe stress. This synthetic fluid ensures that your drivetrain shifts smoothly and remains free of the wear that conventional fluids cannot prevent.
For the differential and transfer case, the vehicle uses limited-slip and standard differentials that benefit from high-performance gear lubes. The rear differential capacity is 1.7 pints. Depending on the specific gear ratio and operating conditions, different viscosities are recommended. AMSOIL SEVERE GEAR® 80W-90 is a versatile choice for GL-5 applications, offering advanced protection against thermal runaway and rust. For heavier loads or specific gear setups requiring 75W-110, the AMSOIL SEVERE GEAR 75W-110 variant provides similar thermal stability and wear protection. In some applications, an 80W-90 lube may be specified, and the AMSOIL SEVERE GEAR 75W-90 ensures long oil and seal life while containing friction modifiers for limited-slip differentials.
Cooling System and Fluids
A properly maintained cooling system is vital for the longevity of the FB25 engine. The total AMSOIL Passenger Car & Light Truck Antifreeze & Coolant capacity for the vehicle is 8.2 quarts. This formulation is a ready-to-use, 50/50 pre-mix that is phosphate-, nitrate-, and silicate-free, protecting all metals, gaskets, and hoses. It offers protection for up to 150,000 miles or five years. Alternatively, for those seeking ultimate longevity, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant is a concentrated fluid that, when mixed with distilled water, can last up to 150,000 miles or 120,000 miles in heavy-duty applications, significantly surpassing standard corrosion standards.
Brake safety is paramount, and the 2016 Outback requires a hydraulic AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid meeting DOT 3 specifications. This fluid provides a stable viscosity over a wide temperature range, ensuring that pedal feel remains consistent during heavy braking. This synthetic fluid resists moisture absorption, which can lower the boiling point and cause brake fade, making it a superior choice for maintaining responsive ABS and traction control systems.
Additional Maintenance and Protection
Beyond the critical lubricants, maintaining a clean and efficient engine involves using fuel additives. The AMSOIL P.i. Performance Improver Gasoline Additive can restore up to 14% horsepower and clean GDI fuel injectors to 100% flow rate after just one tank of fuel. This helps prevent carbon buildup and pre-ignition knock, which are common issues in direct-injection engines like the Subaru FB series. For seasonal storage, AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, protecting against varnish and gum buildup. During periods of inactivity, AMSOIL Engine Fogging Oil can be used to coat internal engine components, preventing rust and corrosion.
Maintenance does not end with lubrication; keeping the vehicle clean and protected from the elements is also part of ownership. The AMSOIL Silicone Spray offers a dry lubricating film that protects rubber surfaces and locks out moisture without attracting dust. For underbody protection against salt and road grime, the AMSOIL Heavy-Duty Metal Protector leaves a long-lasting, wax-like amber coating. General cleaning needs are met by the AMSOIL Heavy-Duty Degreaser, which removes the toughest grease, and the AMSOIL Engine Degreaser for professional-strength cleaning of engine surfaces.
If you need to clean your wheels or exterior without scratching, the AMSOIL Miracle Wash Waterless Wash and Wax Spray provides a fantastic shine with a protective finish that repels dust. For glass surfaces, the AMSOIL Glass Cleaner effectively cuts through grime without leaving streaks. For those who enjoy off-roading, the AMSOIL Mudslinger Mud and Dirt Repellent creates a non-stick armor layer on ATVs and dirt bikes, making cleanup easier and protecting against UV rays.
About the Vehicle
The 2016 Subaru Outback is a quintessential example of a crossover utility vehicle that seamlessly blends the ruggedness of an SUV with the handling dynamics of a wagon. Part of the fifth generation of the Outback line, which began in 2015, this model is celebrated for its standard Symmetrical All-Wheel Drive system. This drivetrain is renowned for its ability to provide superior traction in adverse weather conditions, making it a favorite among drivers in snowy or rainy climates. The vehicle is powered by the FB-series boxer engines, a design where the pistons lie flat and horizontally opposed, which lowers the vehicle’s center of gravity for improved stability and cornering.
Known for its practicality, the 2016 Outback features a spacious cargo area and a roof rack system that accommodates a wide variety of outdoor gear, from kayaks to bicycles. This utility, combined with a comfortable interior and advanced safety features, solidified its reputation as a top choice for families and outdoor enthusiasts. The 2.5-liter four-cylinder engine offers a balanced approach to power and fuel efficiency, typically delivering between 15 and 25 miles per gallon depending on driving conditions. The vehicle is designed to handle both daily commutes and weekend getaways with equal competence. Its long suspension travel and robust chassis make it capable of navigating light off-road trails, a capability that sets it apart from many standard crossovers. The 2016 model represents a mature iteration of Subaru’s philosophy, prioritizing reliability and functionality over aggressive styling, resulting in a vehicle that is as much a tool for adventure as it is a reliable daily driver.
Warranty and Care Information
AMSOIL products are subjected to rigorous third-party, industry-standard testing to ensure maximum protection. It is important to note that our recommendations apply to AMSOIL products only, as we cannot be responsible for products from other manufacturers. Always compare fluids and lubricants that were installed in the vehicle with those replacing them during service. Never install more fluid or lubricant than what is considered adequate according to gradients on the dipstick or the level of the filler hole. Failure to perform adequate inspections or obtain proper resolution will limit or negate any liability toward AMSOIL INC. If any discrepancies are noted, they can be reported to AMSOIL for further assistance.