Ensuring your 2022 Mercedes-Benz GLS63 AMG receives the highest quality lubrication is critical for maintaining the performance and longevity of its high-output 4.0L twin-turbo V8 engine. The GLS63 AMG is a luxury performance SUV that demands fluids capable of withstanding extreme thermal stress and maintaining stability under heavy load. Using the correct viscosity and meeting the specific European manufacturer standards can significantly reduce wear, prevent sludge buildup, and keep the sophisticated engine management systems operating within their optimal parameters. This guide outlines the exact AMSOIL specifications, capacities, and product recommendations designed to meet the rigorous demands of this specific vehicle platform.
Recommended AMSOIL Products
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – This premium fluid is formulated specifically for the unique demands of gasoline and hybrid European vehicles, featuring a precise blend of synthetic base oils designed for superior protection in high-temperature operating conditions.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – An excellent choice for all-temperature operation, this full synthetic oil ensures fast oil flow during cold starts while maintaining a robust protective film at high engine speeds and elevated temperatures.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A ready-to-use, phosphate-, nitrite-, and silicate-free ethylene glycol coolant that provides protection up to 150,000 miles or 5 years, ensuring your engine operates at the correct temperature without risking corrosion.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated non-toxic formula that can be mixed with water to create a long-lasting coolant, offering exceptional protection against boiling, freezing, and corrosion for extended service intervals.
Engine Oil Specifications and Capacity
The 2022 Mercedes-Benz GLS63 AMG is powered by the AMG 4.0L M177 V8 engine, a twin-turbocharged powerhouse that generates significant heat and requires lubricants that can break down quickly during cold starts and remain stable under extreme exhaust temperatures. The factory-recommended oil viscosity is either 0W-40 for all temperature conditions or 5W-40 for temperatures above -25°C. When performing an oil change, the system requires approximately 10 quarts of oil, which includes the filter replacement. After refilling the sump, it is imperative to verify the oil level using the vehicle’s onboard sensor or dipstick to ensure proper fill quantities.
The oil drain plug torque specification for the metal drain plug is 15 foot-pounds. It is best practice to replace the drain plug seal every time the oil is changed to prevent leaks, especially given the high pressure and vibration inherent in the AMG powertrain. AMSOIL synthetic oils exceed the highest industry standards and provide enhanced protection against the shear forces created by the turbochargers and high compression ratios found in this engine. Unlike conventional oils, synthetic formulas resist thermal degradation and oxidation, which helps maintain oil pressure and reduces the buildup of carbon deposits on the turbo bearings and valve train components.
Cooling System Maintenance
Maintaining the cooling system on the GLS63 AMG is equally important for engine health. The engine’s cooling system requires a specific type of coolant to prevent corrosion of the aluminum components and to protect against the extreme heat generated by the V8 twin-turbo setup. The vehicle requires either 5.3 quarts of LTCC coolant or 16.6 quarts of HTCC coolant, depending on the specific reservoir capacity and configuration. AMSOIL offers two distinct options for this vehicle: a pre-mixed ethylene glycol formula and a concentrated propylene glycol formula.
The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a 50/50 pre-mixed solution that requires no mixing with water and provides protection up to 150,000 miles or five years. It is formulated to be compatible with all other antifreeze colors and contains no phosphates, nitrites, or borates, which are known to cause silicate dropout in cooling systems. For those who prefer a concentrated solution, the AMSOIL Propylene Glycol Antifreeze is a safer, non-toxic option that requires mixing with distilled water. This concentrate can protect the cooling system for up to 150,000 miles and offers a higher boiling point, which is beneficial for preventing overheating during towing or spirited driving in hot climates.
Other Lubricants and Additives
While the engine and cooling system are the primary areas of focus for the GLS63 AMG, proper maintenance extends to other fluid systems. Although specific transmission, differential, and brake fluid recommendations were not detailed in the source summary for this specific engine code, ensuring the use of high-quality additives can support overall vehicle performance. The AMSOIL P.i. Performance Improver is a gasoline additive designed to restore horsepower and clean GDI fuel injectors, which are common on this engine platform. Regular use can help maintain fuel economy and prevent the pre-ignition knock associated with high-compression turbocharged engines.
For vehicle owners who engage in seasonal storage of their GLS63 AMG or store the vehicle for extended periods, protecting the engine from corrosion and fuel degradation is essential. AMSOIL Gasoline Stabilizer can keep fuel fresh for up to 12 months, preventing varnish and gum buildup that can clog delicate fuel injectors. Additionally, AMSOIL Engine Fogging Oil can be used to coat internal engine components, preventing rust during long periods of inactivity. For exterior maintenance, the AMSOIL Heavy-Duty Degreaser is ideal for cleaning engine bays and removing grease and grime, while the AMSOIL Power Foam Cleaner can help remove stubborn deposits from carburetors and induction systems, ensuring the turbochargers receive the correct air-to-fuel mixture.
About the Vehicle
The 2022 Mercedes-Benz GLS63 AMG represents the pinnacle of luxury performance SUVs, combining the spacious, seven-passenger utility of the GLS class with the raw power and handling dynamics associated with the AMG brand. Built on the MB GA platform, this vehicle is a flagship model that positions itself at the top of the luxury crossover market. Under the hood lies the 4.0L M177 twin-turbo V8 engine, a masterpiece of engineering that delivers over 600 horsepower, allowing the heavy SUV to accelerate with surprising agility. This powertrain is mated to a 9G-TRONIC 9-speed automatic transmission, which ensures smooth and rapid gear changes regardless of the driving mode selected.
Owners of the GLS63 AMG often appreciate its dual nature as a daily driver and a high-performance machine. It features an adaptive air suspension system that can be lowered for dynamic driving or raised for easier entry and exit. The interior is typically appointed with high-quality materials, including Nappa leather and open-pore wood trim, creating an atmosphere of refined luxury that contrasts with the aggressive performance capabilities. The vehicle is known for its quiet ride quality, advanced driver assistance systems, and impressive towing capacity, making it a versatile choice for families and performance enthusiasts alike.
Despite its robust engineering, the GLS63 AMG can face specific challenges typical of high-performance European vehicles. One common issue with the M177 engine is the potential for carbon buildup on the intake valves due to direct injection and high-temperature operation. Regular use of high-quality fuel additives like the AMSOIL P.i. Performance Improver can help mitigate this issue and maintain optimal fuel injector flow. Another concern for owners is the risk of oil leaks from valve cover gaskets or oil cooler lines, a wear item that can be exacerbated by high thermal cycling. AMSOIL synthetic motor oils are formulated to resist oxidation and thermal breakdown, which can help minimize the formation of varnish and sludge that often contribute to gasket hardening and failure.
Turbocharger health is another critical area for the GLS63 AMG. The high boost pressures and rapid spool times place significant stress on the turbo bearings and oil supply lines. Using a synthetic oil with superior shear stability and extreme pressure additives can help ensure that the turbocharger bearings are well-lubricated even under the most demanding driving conditions, extending the life of these expensive components. Additionally, the vehicle’s cooling system must be kept in peak condition to prevent overheating, which can occur during track driving or prolonged heavy towing. By using a high-performance coolant like the AMSOIL Propylene Glycol Antifreeze, owners can ensure that the engine maintains its optimal operating temperature, reducing the thermal stress on the engine block and cylinder heads. Finally, the vehicle’s complex electronics and sensors require a stable electrical system, which can be supported by clean, high-quality fluids that prevent corrosion in the various fluid reservoirs and sensors throughout the vehicle.