The 2022 Audi S8 represents the pinnacle of luxury performance sedans, featuring a twin-turbocharged 4.0-liter V8 engine that delivers immense power and requires the highest level of maintenance to keep it running smoothly. Proper lubrication is critical for this high-performance vehicle, especially given the extreme thermal loads generated by the turbochargers and the aggressive nature of the engine. Using a synthetic lubricant specifically formulated for European vehicles ensures that the engine components are protected against sludge, varnish, and wear, maintaining the vehicle’s performance and longevity for years to come.
Recommended AMSOIL Products
- AMSOIL 0W-30 MS 100% Synthetic European Motor Oil – This is the primary recommendation for the 2022 Audi S8 4.0L engine, designed with a precise blend of synthetic base oils and premium additives to meet the unique demands of European gasoline and diesel vehicles. It offers superior protection for the turbocharger and engine components.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Engineered to withstand the rigors of heavy towing and elevated temperatures, this fluid provides excellent protection for the 8-speed transmission, remaining fluid in sub-zero temperatures and reducing sludge buildup.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – This OAT-based coolant is designed to protect all cooling system metals, gaskets, and hoses, offering protection up to 150,000 miles or 5 years. It is a phosphate-, nitrate-, and nitrite-free formula compatible with various vehicle systems.
- AMSOIL 75W-90 Long Life 100% Synthetic Gear Lube – Specifically engineered for high-load gear applications, this lubricant provides protection against rust and corrosion while improving seal life and efficiency for the differential.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – An advanced option for limited-slip differentials, this lube contains friction modifiers to control thermal runaway and reduce operating temperatures, extending the life of the gear and seal components.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – This fluid provides excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range, ensuring consistent braking performance under heavy use.
Engine Oil and Filter Specifications
The heart of the 2022 Audi S8 is the 4.0-liter V8 engine, identified by engine code CWWB. This high-output powerplant features turbocharging technology that subjects the engine oil to extreme heat and stress. To combat this, the recommended oil viscosity is 0W-30, which is suitable for all temperature conditions. The engine oil capacity is substantial, requiring 10 quarts when the filter is included during a service. It is crucial to follow the manufacturer’s torque specification of 22 ft/lbs for the oil drain plug and to replace the drain plug seal every time the oil is changed to prevent leaks and ensure a secure seal.
While the specific oil filter is not listed as a recommendation in the primary fitment data, the emphasis on using AMSOIL 0W-30 MS is paramount. This European-formulated motor oil features a precise blend of synthetic base oils and premium additives that are specifically tailored for the tight tolerances found in European luxury vehicles. It provides the necessary protection against engine wear, sludge, and varnish buildup that can occur in high-performance turbocharged engines.
Transmission and Differential Protection
The transmission system in the 2022 Audi S8 requires a fluid capable of handling the high torque output of the V8 engine. For the automatic transmission, the capacity can vary between 3.6L to 4.0L (approximately 3.8 to 4.2 quarts) for an initial fill, while the total fill capacity for the 8-speed 0D6 transmission is around 9.1 quarts. The recommended AMSOIL fluids are designed to remain fluid even in sub-zero temperatures while providing a reserve of protection during heavy use, towing, or challenging driving conditions.
For the differential, the requirements vary slightly based on the axle code. For axle codes QUW and QUU, the rear differential requires 2.1 pints of lubricant. For codes QQS, the rear axle also calls for 2.1 pints. If the vehicle has axle codes TVN or TVM, the capacity increases to 3 pints. AMSOIL offers two distinct gear lube options depending on the specific application and the driver’s preference for extreme performance. The 75W-90 Long Life synthetic gear lube is ideal for extended service intervals, while the SEVERE GEAR® 75W-90 is optimized for limited-slip differentials, containing friction modifiers to prevent chatter and control thermal runaway. Both options protect against rust, corrosion, and wear, ensuring the drivetrain operates smoothly.
Cooling System and Brake Fluid
Maintaining the correct cooling system chemistry is vital for a turbocharged engine that operates at high temperatures. The coolant capacity for the 2022 Audi S8 is 10.6 quarts. AMSOIL offers a choice between a pre-mixed formulation, the Passenger Car & Light Truck Antifreeze & Coolant, and a concentrated formula, the Propylene Glycol Antifreeze and Engine Coolant, which requires mixing with distilled water. The pre-mixed option provides protection up to 150,000 miles or 5 years and is phosphate-, nitrate-, and silicate-free, making it safe for all cooling system metals and gaskets. The concentrated version offers even longer protection potential in heavy-duty applications and greatly surpasses standards for metallic corrosion and erosion.
Brake system performance is non-negotiable for a vehicle of this caliber. The 2022 Audi S8 utilizes a hydraulic brake system requiring DOT 4 fluid, specifically part number B 000 750 M3. AMSOIL’s DOT 3 and DOT 4 100% Synthetic Brake Fluid is designed to meet these exacting standards. It provides stable viscosity across a wide temperature range and ensures excellent responsiveness for ABS and traction control systems, giving the driver confidence in critical stopping situations.
About the Vehicle: 2022 Audi S8
The 2022 Audi S8 is a flagship luxury sedan that blends the sophisticated comfort expected of the Audi brand with the raw performance of a high-performance sports car. Built on the VW Group’s MLB EVO platform, which it shares with other premium vehicles like the Porsche Panamera and Bentley Continental GT, the S8 offers a blend of technological innovation and engineering prowess. Under the hood lies a 4.0-liter TFSI twin-turbocharged V8 engine that produces impressive horsepower, propelling this heavy sedan with acceleration times that rival many sports cars.
Owners of the S8 appreciate its ability to be a practical daily driver while delivering track-ready performance. The interior is a sanctuary of luxury, featuring high-quality materials, advanced infotainment systems, and cutting-edge safety features. The exterior design is sleek and imposing, signaling the power hidden within. However, with this level of performance comes specific maintenance requirements. The twin-turbo setup places significant thermal stress on the engine components, making the quality of the lubricants used a critical factor in long-term reliability.
Common issues that owners of high-performance turbos often face include oil consumption, turbocharger wear, and transmission shifting hesitation. Using a high-quality synthetic motor oil like AMSOIL 0W-30 MS can help mitigate oil consumption by providing better film strength and reducing burn-off. The advanced additive package helps keep the turbochargers clean, preventing oil coking, which is a common failure point in turbo engines. Additionally, the use of a premium transmission fluid can address shifting hesitation by ensuring the transmission operates at optimal temperatures and with reduced friction. Gear noise in the differential can also be reduced by using the appropriate synthetic gear lube, which contains friction modifiers for limited-slip applications to eliminate the dreaded “chatter” during low-speed turns.
The S8 is also known for its advanced all-wheel-drive system, which requires precise lubrication to ensure power is distributed effectively to all wheels. The differential lubricants play a key role here, ensuring that the clutch packs within the transfer case and rear differential are protected and function smoothly. By maintaining the cooling system with a high-quality antifreeze, owners can prevent overheating issues that can lead to warped cylinder heads or gasket failures, common concerns in high-stress engines. Finally, the brake fluid must be replaced regularly to maintain the high boiling point required for the vehicle’s performance braking system, ensuring that the car stops as effectively as it accelerates.
In summary, the 2022 Audi S8 is a remarkable machine that demands top-tier maintenance to fulfill its potential. From the engine oil that protects the heart of the vehicle to the gear lube that ensures smooth power delivery, every fluid plays a vital role in the S8’s operation. By choosing AMSOIL synthetic products, owners can ensure their S8 continues to deliver the exceptional performance and reliability that the model is famous for.