The 2018 Mercedes-Benz GLE63 AMG is a high-performance luxury SUV that demands precision maintenance, especially given its twin-turbocharged 5.5-liter V8 engine. Because of the extreme thermal and mechanical stresses generated by this powertrain, using standard conventional fluids can lead to premature wear, sludge buildup, and reduced performance. To keep this vehicle operating at its peak, it is essential to utilize synthetic lubricants designed specifically for European engineering standards. These fluids offer superior thermal stability, extended drain intervals, and enhanced protection against the high temperatures found in turbocharged applications.
Recommended AMSOIL Products
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – A specialized blend designed for gasoline and hybrid European vehicles, providing precise protection for the GLE63 AMG’s engine.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – Offers exceptional flow in sub-zero temperatures while maintaining necessary film strength at high engine temperatures.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Provides outstanding protection against the rigors of heavy towing and elevated temperatures common in performance SUVs.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS responsiveness and stable viscosity across a wide temperature range for safer stopping power.
Choosing the right oil viscosity is critical for the health of the 5.5-liter engine. The manufacturer specifies a capacity of 9 quarts when changing the oil filter, and it is vital to verify the oil level after the refill. The AMSOIL FS 100% Synthetic European Motor Oil series is engineered with a precise blend of synthetic base oils and premium additives that meet or exceed the strict OEM specifications required by Mercedes-Benz. This ensures that the engine receives the necessary lubrication to handle the heat generated by the turbochargers and the heavy loads of the GLE63 platform.
For the cooling system, the 2018 GLE63 AMG requires specific antifreeze formulations. The High-Temperature Coolant System (HTCC) holds 8.5 quarts, while the Low-Temperature Coolant Circuit (LTCC) contains 2 quarts. AMSOIL offers two primary options to meet these needs. The Passenger Car & Light Truck Antifreeze & Coolant is a ready-to-use 50/50 ethylene glycol pre-mix. It is formulated to last up to 150,000 miles or five years, offering protection for all cooling system metals, gaskets, and hoses without the use of silicates, nitrates, or borates. Alternatively, owners seeking a concentrated solution can use the Propylene Glycol Antifreeze and Engine Coolant, which requires mixing with distilled water and provides even longer service intervals for heavy-duty use.
Transmission maintenance is equally vital for this high-output vehicle. The 7-speed automatic transmission with the 722.9 gear set requires a specific fluid to ensure smooth shifting and longevity. Whether the vehicle has the A89 reduced-friction datacard code or not, the Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is the top recommendation. It remains fluid in sub-zero conditions and withstands the extreme heat and torque loads of the AMG model. For those preferring an OE-matched specification, the OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid provides excellent wear protection while meeting original equipment standards. The total fill capacity for the 7-speed transmission is approximately 9.5 quarts.
Essential Fluids for Complete Protection
Beyond the engine and transmission, the GLE63 AMG requires high-quality fluids for its braking and transfer case systems. The brake fluid should be a DOT 3 and DOT 4 compliant product to ensure compatibility with the vehicle’s advanced anti-lock braking systems. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid offers a stable viscosity over a wide temperature range, preventing the fluid from boiling under the intense braking stress of a heavy, fast vehicle. While specific transfer case lubricant recommendations were not detailed in the primary fitment data, using a high-quality synthetic transfer case fluid is advisable for optimal performance in all driving conditions.
Vehicle Background
The 2018 Mercedes-Benz GLE63 AMG represents the pinnacle of the brand’s luxury SUV lineup during this era. As a high-performance variant of the standard GLE class, this vehicle is designed to bridge the gap between a comfortable daily driver and a track-capable machine. The model is powered by the formidable 5.5-liter biturbo V8 engine, code-named the M157.98. This powerplant is renowned for delivering immense torque and horsepower, allowing the large, heavy SUV to accelerate with surprising speed. The vehicle typically features an advanced all-wheel-drive system that can redistribute power to the wheels with the most traction, making it a capable performer in various weather conditions while retaining its status as a luxury cruiser.
Owners of the GLE63 AMG often select this vehicle for its versatility. It offers the interior space and cargo capacity of a large family hauler but with the driving dynamics of a sports car. The suspension systems are tuned to provide a balance between sporty handling and ride comfort, utilizing air suspension in many configurations to adjust to different road surfaces. The aggressive styling cues, including the distinct AMG grille and aerodynamic enhancements, give the vehicle a commanding presence on the road. It is a popular choice for those who refuse to compromise on either luxury or performance.
Despite its engineering excellence, the GLE63 AMG presents specific challenges for owners due to its high-performance nature. One common issue faced by enthusiasts is the tendency for turbocharged engines to develop carbon buildup on intake valves, especially with Gasoline Direct Injection (GDI) technology. Using synthetic motor oils that offer superior high-temperature stability can help mitigate some of these deposition issues, though AMSOIL P.i.® Performance Improver Gasoline Additive may also be beneficial for long-term maintenance. Another area of concern is the high thermal load placed on the transmission during spirited driving. The stress of rapid shifts and the heat generated by the torque converter can cause the transmission fluid to break down faster than in standard applications, making a robust synthetic fluid essential for preventing wear and shifting delays.
A third potential problem involves the cooling system, where the high heat output of the V8 engine can push the limits of standard coolants, potentially leading to corrosion or boil-over if the mixture is incorrect or old. The use of extended-life antifreeze formulations helps protect the aluminum components and gaskets within the cooling system. Finally, owners often report that brake fade can occur during repeated hard stops due to the vehicle’s mass and speed. Upgrading to a high-performance synthetic brake fluid with a higher boiling point can significantly improve braking consistency and safety, ensuring that the powerful stopping ability matches the vehicle’s acceleration. By addressing these specific areas with the correct lubricants, owners can extend the life and performance of their GLE63 AMG.