The 2018 Mercedes-Benz GLC63 AMG presents a unique challenge for vehicle owners and maintenance professionals alike. Under the hood lies the potent 4.0L twin-turbocharged V-8 engine, identified by the internal Mercedes-Benz engine code 177.980 C. This high-performance powerplant demands lubrication solutions that go beyond standard factory recommendations, especially given the intense thermal loads generated by the twin-scroll turbochargers and the high-revving nature of the AMG platform. Proper fluid maintenance is not just about adhering to a schedule; it is about preserving the longevity of precision components and maintaining the dynamic driving character that defines the vehicle.
Using the correct synthetic lubricants ensures that the engine oil maintains its viscosity and film strength under extreme temperatures, preventing sludge buildup and reducing wear on critical valve train components and turbo bearings. Furthermore, the GLC63 AMG’s sophisticated transmission and cooling systems require fluids specifically engineered to handle the heat and friction of a performance SUV. Selecting the right AMSOIL products allows owners to extend service intervals while providing superior protection against the harsh conditions of stop-and-go city driving and spirited highway acceleration.
Recommended AMSOIL Products
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – Specifically formulated for European high-performance vehicles with a 0W-40 or 5W-40 viscosity requirement. It features a unique blend of synthetic base oils and premium additives to protect the turbocharger and engine internals.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – An alternative viscosity option designed for the 4.0L turbocharged engine, offering precise oil film strength and exceptional protection in both cold starts and high-temperature operations.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A pre-mixed, phosphate- and silicate-free OAT formulation that provides corrosion protection and extends cooling system life, ideal for the tight thermal management needs of this AMG model.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option that requires mixing with distilled water, offering superior freeze and boil-over protection for vehicles operating in extreme climates.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands the rigors of heavy towing and elevated temperatures while remaining fluid in sub-zero conditions, ensuring smooth shifts for the 7-speed automatic transmission.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Designed to protect against wear and provide reliable performance in severe driving conditions, serving as a high-quality replacement for OEM transmission fluids.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Offers excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range, meeting or exceeding the requirements for MB Sheet 331.0.
Understanding Fluid Capacities and Specifications
When performing maintenance on the 2018 GLC63 AMG, adhering to the specific capacity and torque specifications is crucial for proper lubrication. The engine oil system requires a substantial volume due to the large oil pan and filter capacity, with the total volume being 9.5 quarts including the filter replacement. It is essential to refill to the correct level and then check the oil level again after a refill to ensure accuracy. For the oil drain plug, a torque of 3 ft/lbs is recommended for the plastic version to prevent stripping, ensuring a reliable seal over the long term.
The cooling system also requires precise attention. The vehicle utilizes a specialized AMSOIL Passenger Car & Light Truck Antifreeze & Coolant. For the Low Temperature AMSOIL Propylene Glycol Antifreeze and Engine Coolant (LTCC), the capacity is 4.9 quarts, while the High Temperature Coolant Coolant (HTCC) capacity is 11.7 quarts. Using a product like the Passenger Car & Light Truck Antifreeze & Coolant ensures compatibility with the vehicle’s metals, gaskets, and hoses, providing protection up to 150,000 miles or 5 years. The coolant is ethylene glycol-based and pre-mixed 50/50, eliminating the need for water mixing and ensuring immediate corrosion protection.
In the transmission and differential areas, the GLC63 AMG operates under significant stress. While specific transmission filters are not listed as available replacements in all service scenarios, the fluid itself is a critical component. The transmission fluid protects against sludge and wear, particularly during the vehicle’s spirited driving modes. The AMSOIL Signature Series Fuel-Efficient Automatic Transmission Fluid is designed to handle the high heat generated by the AMG transmission, providing reserve protection during heavy use. For the differential and transfer case, capacities are often listed as unknown (U/K) in general guides, but the transfer case lubrication requires specific torque settings: 8 ft/lbs for the fill plug and 18 ft/lbs for the drain plug, with a capacity of approximately 1.4 pints for the transfer case component.
AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid maintenance is another vital aspect of keeping the AMG safe and responsive. The vehicle specifies the use of DOT 4 plus or products approved on MB Sheet 331.0. The synthetic brake fluid provides a stable viscosity over a wide temperature range, which is essential for high-performance braking systems that may experience repeated heavy braking. This fluid ensures excellent responsiveness for both ABS and traction control systems, maintaining safety and performance when the driver demands it most.
Advanced Lubrication Strategies for Performance
While standard fluid changes keep the vehicle running, advanced lubrication strategies can enhance performance and efficiency. For the fuel system, the AMSOIL P.i. Performance Improver is a potent gasoline additive designed to restore up to 14% horsepower by cleaning GDI fuel injectors back to 100% flow rate. This is particularly beneficial for direct injection engines where carbon buildup can occur, helping to reduce the need for higher-octane fuel and controlling pre-ignition knock. Additionally, the AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor helps lubricate the fuel system and upper cylinders, adding a layer of protection against friction and corrosion.
For seasonal storage or long periods of inactivity, protecting the engine from internal rust is paramount. AMSOIL Engine Fogging Oil is a highly effective rust preventive designed to coat internal engine components, safeguarding them during storage. Similarly, the AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, protecting against varnish, gum buildup, and ethanol corrosion. These products ensure that when the vehicle is taken out of storage, the engine and fuel system are ready for immediate operation without the need for extensive flushing or repairs.
Exterior and interior protection also plays a role in the overall maintenance regimen. The AMSOIL Heavy-Duty Metal Protector offers a long-lasting, wax-like coating that resists salt, moisture, and chemical corrosion, making it ideal for undercoating or protecting metal surfaces. For the interior, detailers like the AMSOIL Interior Detailer – Light Lemon or the AMSOIL Interior Detailer – Scent Free provide UV protection and trap odors, keeping the cabin fresh. Regular cleaning with products like the AMSOIL Miracle Wash Waterless Wash and Wax Spray can also preserve the vehicle’s finish with minimal effort, repelling dust and dirt while offering UV protection.
The AMSOIL Engine Degreaser and AMSOIL Heavy-Duty Degreaser are essential for maintaining the engine bay, quickly removing tough grease, tar, and grime without damaging surrounding components. Cleaning brake parts with the AMSOIL Brake and Parts Cleaner helps eliminate squeal and chatter, ensuring optimal braking performance. For the wheels and exterior, the AMSOIL High-Foam Car Shampoo breaks down road grime gently, while the AMSOIL Exterior Ceramic Spray provides a rapid water-shedding finish that protects against UV rays, keeping the GLC63 AMG looking pristine.
Vehicle Background
The 2018 Mercedes-Benz GLC63 AMG represents the pinnacle of the brand’s compact luxury crossover lineup. Built on the W205 platform, which also underpins the standard GLC and C-Class models, the AMG version distinguishes itself through a combination of aggressive styling, track-ready performance, and everyday practicality. Under the hood sits the M177 engine, a 4.0-liter twin-scroll turbocharged V-8 that replaced the previous 5.5-liter V-8 in earlier AMG models. This shift to a smaller displacement with twin turbos allowed the manufacturer to achieve higher specific output while improving fuel efficiency and reducing emissions.
Owners of the GLC63 AMG appreciate the vehicle for its dual personality. In Eco mode, it functions as a composed, fuel-efficient daily driver, but engaging the AMG Select mode transforms it into a high-performance sports SUV capable of 0-60 mph times in the mid-4-second range. The 7-speed AMG SPEEDSHIFT MCT automatic transmission works in tandem with the engine to deliver lightning-fast shifts, contributing to the car’s dynamic handling on both winding roads and straightaways. The suspension is tuned to provide a firm yet compliant ride, balancing the need for handling precision with ride comfort.
Despite its robust engineering, this high-performance machine is not without its quirks. One common issue noted by owners involves carbon buildup on the intake valves, a characteristic of direct injection engines that can affect throttle response and power delivery over time. The use of fuel additives like AMSOIL P.i. can help mitigate this by keeping injectors clean and preventing deposit formation. Another potential concern for the turbocharged engine is the stress placed on the turbo bearings and valve train components, which can benefit significantly from the superior film strength of synthetic European motor oils designed for high-temperature stability.
Transmission issues, while less common, can sometimes arise due to the intense heat generated during spirited driving. The high demands placed on the automatic transmission can lead to fluid breakdown over time, necessitating regular fluid changes to prevent sludge and ensure smooth operation. Additionally, the brake system, subjected to repeated hard stops, can suffer from fluid moisture absorption, leading to reduced braking performance. Using high-quality DOT 4 synthetic brake fluid helps maintain a higher boiling point, ensuring consistent pedal feel and braking power. Finally, general wear on the front struts and suspension bushings can occur sooner on high-performance models compared to standard SUVs, highlighting the importance of using protective lubricants like silicone sprays and AMSOIL MP Metal Protector to guard against rust and corrosion on chassis components.
Overall, the 2018 GLC63 AMG is a vehicle that rewards attentive maintenance. By using the correct synthetic lubricants and additives, owners can ensure that their vehicle continues to deliver the thrilling performance and luxury experience that defined the AMG brand. Whether commuting in city traffic or enjoying a weekend drive on the open road, the GLC63 AMG remains a top-tier choice for those who demand both power and refinement.