The 2018 Mercedes-Benz GLC63 AMG S is a high-performance luxury compact SUV that demands precision when it comes to maintenance. Equipped with the formidable 4.0-liter twin-turbo V8 engine, this vehicle operates under significantly higher thermal and mechanical stress than standard SUVs. The unique demands of the AMG engine code 177.980 C Turbo require lubricants that can maintain stability in extreme temperatures while providing maximum protection against wear for turbocharged components. Using the correct viscosity and formulation is critical to maintaining the vehicle’s peak performance, longevity, and resale value. Proper lubrication extends the life of the powertrain and ensures that the complex internal geometry of the turbocharger remains healthy during aggressive driving or spirited track use.
Recommended AMSOIL Products
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – An advanced synthetic formula designed specifically for the demanding requirements of European gasoline, diesel, and hybrid engines. It features a precise blend of base oils and additives to handle high heat.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – Provides superior cold-start protection and maintains optimal viscosity in extreme heat, ideal for all-temperature driving conditions in high-performance AMG vehicles.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A pre-mixed 50/50 ethylene glycol formulation that exceeds OEM requirements, protecting the cooling system against corrosion, freezing, and boiling for up to 150,000 miles or 5 years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated coolant that offers superior protection against metallic corrosion and erosion, allowing for longer service intervals and flexibility in mixing ratios.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Engineered to withstand heavy towing, elevated transmission temperatures, and challenging terrain while maintaining fluidity in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A high-performance transmission fluid that provides essential wear protection and meets the stringent specifications required by modern automatic transmissions.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range, ensuring consistent brake pedal feel.
When maintaining the 2018 GLC63 AMG S, the engine oil capacity is a critical specification to observe. The 4.0L V8 engine requires 9.5 quarts of lubricant when the oil filter is replaced. After refilling, it is essential to check the oil level carefully to ensure the dipstick or electronic sensor indicates the correct range. The oil drain plug torque specifications are also vital; plastic drain plugs should be torqued to 3 ft/lbs to prevent stripping the threads or damaging the seal during service. While the source guide does not list specific AMSOIL oil filters for this engine code, using the correct synthetic motor oil is the primary defense against the soot and high-temperature breakdown common in direct-injection turbocharged engines. The 0W-40 and 5W-40 grades recommended for this vehicle ensure that the engine is adequately protected from the moment the key is turned, even in freezing temperatures, up to the extreme heat generated by the biturbo system.
Thermal management is equally important for this high-output vehicle. The cooling system capacities vary depending on the specific configuration and fluid type used. For low-temperature coolant concentrations, the capacity is 4.9 quarts. For high-temperature coolant concentrations, the system holds 11.7 quarts. AMSOIL offers both pre-mixed solutions and concentrated propylene glycol antifreeze that can be mixed with distilled water to achieve the desired freeze point protection. These formulations are phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free, making them compatible with all cooling system metals, gaskets, and hoses found in European vehicles. This chemical stability prevents the corrosion and scaling that can choke the intricate cooling passages of the AMG powertrain.
The transmission system in the GLC63 AMG S also requires specific attention. While the source data indicates no specific filter recommendations for the transmission, the use of a high-quality synthetic transmission fluid is paramount for shifting performance and longevity. The Signature Series Fuel-Efficient Automatic Transmission Fluid and the OE Fuel-Efficient variant are designed to protect against wear, sludge, and temperature-related problems. They remain fluid in sub-zero temperatures, ensuring smooth operation during winter months, while providing reserve protection during heavy use, such as track driving or towing, which are capabilities this SUV possesses. These fluids help extend the life of the transmission, preventing costly repairs associated with torque converter wear and valve body sticking.
Braking systems on performance SUVs are subjected to intense heat and frequent usage. The 2018 GLC63 AMG S requires a brake fluid that meets or exceeds Mercedes-Benz sheet 331.0 specifications, often referencing DOT 4 plus standards. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid meets these rigorous requirements, offering a higher dry boiling point and a stable viscosity profile compared to conventional glycol-based fluids. This stability is crucial for maintaining a firm pedal feel and preventing vapor lock during hard braking maneuvers. Additionally, for seasonal storage or long periods of inactivity, AMSOIL Gasoline Stabilizer and Engine Fogging Oil can protect internal components from rust and corrosion, ensuring the vehicle is ready for immediate use when the season changes.
Vehicle Background and Performance History
The 2018 Mercedes-Benz GLC63 AMG S represents the pinnacle of the brand’s compact luxury SUV lineup during its generation. Part of the W205 chassis family, the GLC class is built on the same platform as the C-Class sedan, offering a blend of everyday practicality and high-performance capability that few competitors could match. The AMG S model specifically distinguishes itself with a 4.0-liter V8 biturbo engine, a marvel of modern engineering that replaces the traditional V8 naturally aspirated designs of the past with a twin-scroll turbocharger setup. This engine produces approximately 503 horsepower and 516 lb-ft of torque, delivering acceleration figures that rival many sports cars. The “S” designation in this model line typically indicates enhanced performance features, including stiffer suspension tuning, larger brake calipers, and unique interior styling cues that set it apart from the standard GLC63.
Owners of this vehicle often choose it for its unique position in the market: a vehicle that can carry passengers and cargo comfortably while delivering supercar-level acceleration on demand. The driving character is defined by its explosive power delivery, thanks to the V8 engine’s wide torque band. The 9-speed automatic transmission, often paired with this powertrain, helps manage the immense torque, shifting rapidly to keep the engine in its power band. The SUV’s aggressive stance, wide track, and advanced all-wheel-drive system (4MATIC) provide excellent traction in various weather conditions, making it a versatile year-round driver. The interior reflects the luxury status of the badge, featuring high-quality materials, advanced infotainment systems, and supportive seats designed for both daily commuting and long-distance travel.
Despite its robust engineering, the 2018 GLC63 AMG S does face specific challenges common to high-performance turbocharged vehicles. One notable issue is oil consumption, which can occur in high-mileage or high-stress situations due to the turbocharger’s operation and the high temperatures the engine experiences. Using a high-quality synthetic oil like AMSOIL FS 100% Synthetic European Motor Oil, formulated with advanced additive packages, can help mitigate this issue by providing superior film strength and thermal stability compared to conventional oils. Another common concern is carbon buildup on the intake valves and fuel injectors, a known characteristic of direct-injection engines that can lead to a loss of power and rough idling over time. AMSOIL P.i. Performance Improver gasoline additive is designed to help restore fuel injectors to 100% flow rate and clean internal components, potentially restoring lost horsepower and improving fuel economy.
Furthermore, the intense heat generated by the twin-turbo system places a significant burden on the cooling system. Over time, standard coolants can break down, leading to corrosion and reduced heat transfer efficiency. This can result in overheating issues or degraded engine performance. Regular flushing and replacement with a high-performance coolant like AMSOIL Propylene Glycol Antifreeze helps maintain optimal thermal regulation and protects the aluminum components of the engine block and heads. Additionally, the brake fluid in high-performance vehicles can absorb moisture over time, leading to a spongy pedal feel and reduced braking efficiency. AMSOIL Synthetic Brake Fluid’s high boiling point ensures that the braking system remains reliable even under repeated hard stops, a common scenario for drivers of the GLC63 AMG S. Addressing these specific issues with the correct lubricants not only improves the vehicle’s performance but also extends the service life of critical components, ensuring the SUV remains a reliable and thrilling machine for years to come.
Maintenance of the 2018 GLC63 AMG S is a commitment to preserving its status as a high-performance luxury vehicle. By adhering to the specific fluid recommendations and utilizing premium synthetic products, owners can ensure that their vehicle operates at its intended level of excellence. The combination of advanced motor oils, specialized coolants, and high-performance transmission fluids provides a comprehensive protection strategy that addresses the unique demands of this powerful engine. Whether navigating city streets or pushing the vehicle on a track, the right lubricants make all the difference in maintaining the balance between performance and longevity.