The 2022 Subaru Ascent is powered by a turbocharged 2.4-liter four-cylinder engine that delivers robust performance while remaining efficient. Because this engine operates under higher temperatures and pressures due to the forced induction, it requires a lubrication system that can withstand extreme conditions. Using the correct viscosity and specification of fluid is critical to preventing premature wear, ensuring quick oil flow during cold starts, and maintaining peak fuel economy. Subaru’s factory specifications call for 0W-20 synthetic motor oil, a requirement that synthetic blends or conventional oils cannot meet without risking engine deposits or reduced component life.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – This premium oil offers unsurpassed engine protection for up to 25,000 miles and provides 75% more resistance against horsepower loss and wear compared to conventional oils.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – Ideal for those seeking extended service intervals, this oil delivers up to 20,000 miles of protection and features 37% more cleaning power to keep the turbocharged engine running smoothly.
- AMSOIL Oil Filter EA15K13 – Designed to maximize protection, this filter provides 99% efficiency at 20 microns and allows for lower restriction to ensure vital engine parts remain lubricated even under severe stress.
- AMSOIL 100% Synthetic CVT Fluid CVT – The 2022 Ascent uses a continuously variable transmission that benefits from exceptional metal-to-metal frictional properties, which this synthetic fluid provides to enhance durability and shift quality.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – This OAT formulation protects the cooling system for up to 150,000 miles and 5 years, preventing corrosion and ensuring the engine operates at optimal temperatures regardless of the weather.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – This fluid provides excellent ABS and traction-control responsiveness with a stable viscosity across a wide temperature range, ensuring safe stopping power in all driving conditions.
Engine Oil and Filtration Specifications
For the 2.4-liter FA24 turbocharged engine, the manufacturer explicitly requires 0W-20 synthetic motor oil. The total fluid capacity, including the filter, is 4.8 quarts. After refilling the system, it is crucial to check the oil level and torque the oil drain plug to 31 ft-lbs. If 0W-20 synthetic is unavailable in an emergency, 5W-30 conventional oil may be used as a temporary replenishment, but it should be switched back to the specified synthetic oil at the next service.
Choosing the right oil depends on the vehicle’s age and driving style. For new vehicles or those seeking maximum protection, the Signature Series is the top choice. For owners who prefer a balance between cost and performance with standard intervals, the AMSOIL OE 0W-20 100% Synthetic Motor Oil is a strong option. Engines with over 75,000 miles may benefit from the AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil, which contains enhanced detergents and anti-wear additives to reduce sludge and protect older seals.
Filtration is just as important as the oil itself. The AMSOIL Oil Filter (EA15K13) is specifically engineered for these Subaru engines. It features a higher capacity for small contaminants than many competitors, which helps reduce wear on the turbocharger and bearings. For those who prefer a brand-name alternative, the WIX Oil Filter (57055) is also compatible and offers premium media that improves upon original equipment filters.
Transmission and Cooling System Maintenance
The 2022 Subaru Ascent is equipped with a Lineartronic CVT that relies on specific friction modifiers to function correctly. Using a fluid not designed for this system can lead to shudder, slipping, or premature transmission failure. The AMSOIL 100% Synthetic CVT Fluid is formulated to meet these exacting standards. Whether the vehicle has a TR690 cooler or not, the total fill capacity can range from 12.5 to 13 quarts, depending on the specific configuration. This synthetic fluid ensures exceptional metal-to-metal frictional properties, extending the life of the transmission components.
Coolant maintenance is equally vital for the longevity of the FA24 engine. The cooling system capacity is 11.7 quarts. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a 50/50 pre-mix formulation that provides protection against corrosion for up to 150,000 miles or five years. It is phosphate-free, nitrate-free, and silicate-free, making it compatible with all modern cooling system metals, gaskets, and hoses. For those who prefer a concentrated option, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant offers extreme durability, capable of lasting up to 150,000 miles in passenger cars and up to 1,000,000 miles in heavy-duty applications.
Brake Fluid and Fuel System Care
Over time, brake fluid absorbs moisture, which lowers its boiling point and can lead to brake fade. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid restores the braking system’s performance. It offers excellent responsiveness for the ABS and traction control systems found in the Ascent, maintaining stable viscosity from freezing winters to hot summer stops.
To maintain peak performance, the fuel system must also be kept clean. The AMSOIL P.i.® Performance Improver Gasoline Additive is recommended for GDI (Gasoline Direct Injection) engines. It restores fuel injectors to 100% flow rate, helps prevent carbon buildup, and can restore up to 14% of lost horsepower. This additive is compatible with capless fuel systems and helps control pre-ignition knock, which is a concern in turbocharged direct-injection engines.
Vehicle Background and Owner Experience
The 2022 Subaru Ascent stands out in the crowded three-row crossover SUV market as a top choice for families and outdoor enthusiasts who refuse to compromise on safety or driving dynamics. Introduced to replace the larger three-row Forester concept and the third-generation Outback as a flagship SUV, the Ascent represents Subaru’s largest and most powerful vehicle at the time. It is built on a dedicated platform that offers a lower center of gravity than many competitors, resulting in surprisingly agile handling for a vehicle of its size.
At the heart of the 2022 model is the FA24 2.4-liter turbocharged flat-four engine. This horizontally opposed “boxer” engine design provides a compact footprint and a lower center of gravity, contributing to the vehicle’s stability during cornering. The engine produces roughly 260 to 268 horsepower and 277 lb-ft of torque, delivering ample power for highway passing and light towing, though the Ascent is primarily designed as a capable hauler of people and gear rather than a heavy-duty truck. The engine is paired with a Lineartronic CVT transmission that mimics gear shifts to provide a natural driving feel while maintaining fuel efficiency.
Subaru owners prize the Ascent for its standard All-Wheel Drive (AWD) system, which provides superior traction in rain, snow, and mud compared to front-wheel-drive rivals. The interior is spacious, offering ample room for three rows of passengers, and the second-row captain’s chairs are a popular feature for families. Despite its size, the Ascent drives with a compact feel, often praised by reviewers for its road manners.
However, like any complex mechanical device, the Ascent faces common issues that can be mitigated with high-quality lubricants. One frequent concern with the turbocharged engine is carbon buildup on the intake valves, a problem exacerbated by direct injection. The high detergency of AMSOIL motor oils and the use of the P.i. gasoline additive help prevent this accumulation, keeping the engine clean and responsive. Additionally, turbochargers place significant thermal stress on engine oil; the superior thermal stability of AMSOIL Signature Series synthetic oil protects the turbo bearings from coking and wear, extending their service life.
Another area of concern for Subaru owners is the CVT transmission. Over time, the fluid can degrade, leading to shudder or hesitation. Switching to a dedicated synthetic CVT fluid like the AMSOIL variant can restore smooth operation and prevent costly internal damage. Furthermore, the Ascent’s brake fluid can absorb moisture over time, leading to a spongy pedal feel. Regular flushing with a high-quality synthetic brake fluid ensures consistent pedal firmness and prevents corrosion in the ABS module. Finally, the vehicle’s rubber components, such as hoses and gaskets, benefit from the protection offered by AMSOIL antifreeze, which prevents hardening and cracking in extreme cold temperatures common in Subaru’s target markets. By addressing these specific needs with premium fluids, owners can ensure their Ascent remains a reliable, safe, and enjoyable vehicle for years to come.
Proper maintenance is the key to unlocking the full potential of the 2022 Subaru Ascent. Whether you are navigating city streets or tackling mountain roads, the right lubricants ensure that your vehicle operates as intended. From the engine’s turbocharger to the transmission’s pulleys, every component relies on high-performance fluids to function correctly. By choosing AMSOIL products, you are investing in long-term protection, better fuel economy, and a vehicle that continues to perform like new. Explore the full range of products available to keep your Subaru running smoothly, and feel confident that you are providing the best possible care for your investment.