The 2022 Subaru WRX is a performance-oriented vehicle that demands precision and reliability from its maintenance regimen. Powered by the FA24D turbocharged 2.4-liter four-cylinder engine, this model places significant stress on lubrication systems, particularly during spirited driving or track use. Selecting the correct fluids is not merely a maintenance task but a critical component of preserving the engine’s power output, ensuring the longevity of the turbocharger, and maintaining the vehicle’s renowned handling characteristics. Proper lubrication prevents wear, manages heat, and keeps the internal components clean, directly impacting the driving experience and the vehicle’s resale value.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – The ultimate choice for maximum protection, offering 75% more engine protection against horsepower loss and wear, with guaranteed intervals up to 25,000 miles. Ideal for high-performance driving and extreme conditions.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – Delivers 37% more cleaning power than OE oil and provides guaranteed protection for up to 20,000 miles. This option effectively fights the carbon buildup common in direct-injection turbo engines.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – Specifically formulated to outperform conventional oils and OEM specifications while fighting sludge and deposits. It is a cost-effective way to extend oil change intervals while maintaining robust engine health.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Designed for vehicles with over 75,000 miles, this fluid features enhanced detergents and anti-wear additives that reduce sludge by 67%, helping to revitalize older engines and prevent oil leaks.
- AMSOIL Oil Filter (EA15K20-EA) – Provides 99% filtration efficiency at 20 microns with greater capacity for contaminants than competing filters, ensuring that the high-quality synthetic oil remains clean throughout the service interval.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – An ethylene glycol-based 50/50 pre-mix that protects the cooling system for up to 150,000 miles or 5 years. It is compatible with all cooling system metals and is free of phosphates and silicates.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated non-toxic alternative that offers protection up to 150,000 miles or 5 years. It is an excellent choice for those who prefer a phosphate-, nitrate-, and silicate-free formula with superior freeze and boil-over protection.
- AMSOIL 100% Synthetic CVT Fluid – Provides exceptional metal-to-metal frictional properties to protect the Subaru Lineartronic transmission, reducing shudder and ensuring smooth power delivery under load.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Recommended for the front differential and limited-slip rear differential to control thermal runaway, reduce rust and corrosion, and extend the life of the gears and bearings.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Maintains a stable viscosity over a wide temperature range, ensuring excellent ABS and traction-control responsiveness and higher resistance to brake fade compared to conventional DOT 3 or DOT 4 fluids.
Why Proper Lubrication Matters for the FA24 Engine
The 2022 Subaru WRX represents a significant evolution from previous models, swapping the traditional boxer engine for a new generation of power. While the boxer layout remains iconic for the brand, the FA24D 2.4-liter turbocharged engine introduces higher boost pressures and tighter tolerances than its predecessors. This increased performance capability means the lubricants used must withstand higher thermal loads and provide superior shear stability.
One of the most critical aspects of maintaining this vehicle is the management of pre-ignition and turbocharger health. Direct injection engines are prone to carbon buildup, which can alter combustion characteristics and lead to low-speed pre-ignition (LSPI). The specialized detergents found in AMSOIL Signature Series and AMSOIL Extended-Life motor oils are designed to mitigate these risks, keeping the fuel injectors clean and the combustion chambers free of hotspots that can cause knocking. Furthermore, the turbocharger spins at incredibly high speeds, and the oil flowing through it must not only lubricate but also cool the bearings effectively. AMSOIL Signature Series and Extended-Life oils are engineered to resist thermal breakdown, ensuring that a thin film of oil remains between moving parts even under the most severe driving conditions.
Beyond the engine, the all-wheel-drive system of the WRX relies heavily on the integrity of the differential and transfer case fluids. Synthetic gear lubes like AMSOIL SEVERE GEAR 75W-90 offer superior protection against the wear and tear associated with torque-vectoring systems. They also help maintain consistent friction characteristics for limited-slip differentials, which is essential for the vehicle’s handling dynamics during cornering or slippery road conditions. Neglecting these fluids can lead to premature wear of gears and clutches, compromising the drivetrain’s ability to transfer power to the road effectively.
Comprehensive Fluid Maintenance Schedule
To get the most out of your 2022 WRX, adhering to a proactive fluid maintenance schedule is key. The engine oil capacity for the 2.4-liter turbo is 4.8 quarts when a filter change is included. It is important to note that synthetic oil is required for this engine. When performing an oil change, the drain plug should be torqued to 31 ft/lbs, and a new washer should always be installed to prevent leaks. The AMSOIL Oil Filter (EA15K20-EA) is designed to complement the oil, capturing small wear-causing contaminants that would otherwise circulate through the engine.
For the cooling system, the 2022 WRX requires specific attention depending on the transmission type. Vehicles equipped with the CVT require 9.2 quarts of antifreeze, while those with the manual transmission require 9 quarts. Using a long-life AMSOIL Passenger Car & Light Truck Antifreeze & Coolant or AMSOIL Propylene Glycol Antifreeze and Engine Coolant ensures that the engine operates within safe temperature ranges, preventing corrosion and freeze damage. The coolant is designed to last up to 150,000 miles, reducing the frequency of maintenance intervals compared to traditional green or orange coolants.
The transmission fluid is another area where synthetic options shine. For the automatic CVT transmission, AMSOIL 100% Synthetic CVT Fluid is the recommended choice, offering better frictional properties to enhance shift feel and durability. For the manual transmission, which requires 7 pints of fluid, a GL-5 SAE 75W-90 fluid is compatible, though a specific synthetic AMSOIL SEVERE GEAR 75W-90 is often preferred for its superior longevity. The differential and transfer case also benefit from the use of AMSOIL SEVERE GEAR 75W-90, which contains friction modifiers ideal for limited-slip applications found in performance models.
AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is often overlooked but is critical for the WRX’s safety systems. The vehicle specifies FMVSS116 DOT-3 or DOT-4. This brake fluid offers a higher boiling point than conventional fluids, reducing the risk of vapor lock during hard braking events. This stability ensures that the pedal feel remains firm and responsive, providing confidence in the vehicle’s stopping power.
About the Vehicle
The 2022 Subaru WRX is a quintessential sport sedan that has carved out a unique niche in the automotive world. It is designed for drivers who demand a balance between everyday practicality and track-ready performance. At its heart lies the FA24D engine, a turbocharged 2.4-liter four-cylinder boxer engine that delivers significantly more power and torque than the previous generation’s 2.0-liter unit. This engine swap was a strategic move by Subaru to modernize the WRX lineup, offering better low-end torque and improved fuel efficiency without sacrificing the exhilarating acceleration fans expect.
The WRX is widely celebrated for its symmetrical all-wheel-drive system, a technology that has been a hallmark of Subaru since the 1970s. This system provides inherent traction and stability, making the WRX a capable performer in diverse weather conditions, from snowy mountain passes to wet city streets. The chassis is tuned to offer a responsive driving experience, with a suspension that strikes a fine line between comfort and sporty handling. The interior has also received upgrades, featuring a more driver-centric cockpit with improved infotainment systems and higher-quality materials than previous iterations.
Ownership of a WRX often involves a community of enthusiasts who appreciate its rally-bred heritage and versatile nature. It is a vehicle that can be used as a daily driver while still satisfying the need for spirited driving on weekends. The market reputation of the WRX is built on its reliability, robust aftermarket support, and its ability to handle modifications for those seeking even more performance. It stands as a popular choice among driving enthusiasts who value both the engineering pedigree of Subaru and the raw power of a turbocharged boxer engine.
While the 2022 WRX is a robust vehicle, owners should be aware of a few common issues that can arise over time, particularly with high-mileage driving or track use. One notable concern for this model year is the potential for piston scuffing or premature wear, often associated with the high-stress environment of a direct-injection turbo engine. Using an oil with superior thermal stability and anti-wear additives, such as AMSOIL Signature Series, can significantly mitigate this risk by reducing deposit formation and maintaining oil film strength.
Another common issue among turbocharged Subaru engines is the buildup of carbon deposits on the intake valves and piston crowns. This accumulation can degrade performance and fuel economy over time. AMSOIL motor oils are formulated with enhanced detergent packages specifically designed to fight sludge and deposits, helping to keep the combustion chamber cleaner for longer. Additionally, the cooling system can be a point of failure if the coolant degrades, leading to overheating or corrosion in the radiator and heater core. Regularly flushing the system and replacing it with a high-quality, long-life antifreeze like AMSOIL Passenger Car & Light Truck Antifreeze & Coolant can prevent these costly repairs.
A final area of concern for some owners is the longevity of the CVT transmission components. While generally reliable, the transmission can suffer from shudder or hesitation if the fluid degrades or loses its frictional properties. Switching to a dedicated synthetic CVT fluid like AMSOIL 100% Synthetic CVT Fluid helps maintain the proper friction characteristics for the belts and pulleys, extending the life of the transmission and ensuring smooth shifts. By addressing these potential weak points with the right lubricants, WRX owners can maximize the lifespan and performance of their vehicles, keeping them running smoothly for years to come.