Keeping your 1987 Mercedes-Benz 560SEC running smoothly requires more than just a simple oil change; it demands a comprehensive maintenance strategy tailored to its high-tolerance engineering. The 5.6-liter V8 engine, identified by the 117.968.2 code, is a masterpiece of German automotive history, but its longevity relies heavily on the quality of fluids used within its complex systems. As an owner, you know that this vehicle has specific lubrication needs that standard store-bought products often fail to meet. Utilizing synthetic lubricants designed for European vehicles ensures optimal performance, protects against wear, and helps preserve the car’s value for years to come.
Recommended AMSOIL Products
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – A European formula designed specifically for the unique demands of gasoline, diesel, and hybrid European vehicles, featuring a precise blend of synthetic base oils and premium additives.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – An all-temperature synthetic option engineered to protect your Mercedes-Benz V8 engine in extreme heat and cold, ensuring quick flow and reduced engine drag.
- MANN-FILTERS Oil Filter – Offers premium media filtration that provides improvements over original equipment manufacturer (OEM)-branded filters, ensuring contaminants are captured effectively to protect engine internals.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique poly-organic acid formulation that protects all cooling system metals, gaskets, and hoses, extending service life up to 150,000 miles or 5 years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated coolant that requires mixing, offering exceptional protection against corrosion and erosion for over 100,000 miles while remaining compatible with other coolant types.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing, elevated temperatures, and challenging terrain, providing reliable shift performance and reserve protection during abuse.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Designed to protect against wear and sludge while promoting smooth, shudder-free shifts, this fluid guards against leaks and excels in cold weather.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Provides excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range, ensuring consistent braking performance.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Helps seals remain soft to prevent leaks while reducing friction and resisting heat for a long fluid life, formulated for quiet operation.
The heart of your 1987 560SEC is its massive naturally aspirated 5.6-liter V8 engine. This powerplant produces ample torque and delivers a refined driving experience that is characteristic of the W126 chassis. However, the sheer size and age of the engine mean that oil consumption and internal wear are common concerns for owners. The AMSOIL FS European Motor Oils are formulated to address these specific challenges. With a capacity of 8.5 quarts including the filter, it is critical to use an oil that maintains its viscosity and lubricity under high stress. These oils feature synthetic base stocks that resist thermal breakdown far better than conventional oils, which is essential for maintaining engine cleanliness and reducing sludge buildup in an older engine block. If your vehicle is equipped with an external oil cooler, remember that additional oil may be required when that cooler is drained, and you should always allow the engine to settle for a few minutes after refilling to ensure an accurate dipstick reading.
Beyond the engine, the automatic transmission in the 560SEC requires precise fluid characteristics to maintain its smooth shifting. The transmission holds approximately 9.1 quarts for a total fill and 8.1 quarts for an initial fill, depending on the specific service procedure. Switching to a high-performance synthetic transmission fluid like the Signature Series or OE Multi-Vehicle can restore shift feel, prevent shuddering, and protect against the thermal degradation that often leads to transmission failure in high-mileage vehicles. These fluids are engineered to withstand the rigors of heavy loads and elevated temperatures, ensuring that the transmission remains fluid even in sub-zero conditions. Proper maintenance of this component is key to preserving the driving dynamics that made this car a favorite among collectors.
The cooling system is another critical area that requires attention. With a capacity of 13.7 quarts, the cooling system is substantial. Using an antifreeze and coolant blend that is free of phosphates, nitrates, and silicates is vital to protect the aluminum components and gaskets from corrosion. The AMSOIL options offer excellent protection for up to 150,000 miles or five years, reducing the frequency of costly flushes. For the braking system, AMSOIL DOT 3 and DOT 4 Synthetic Brake Fluid meets the strict requirements for Mercedes-Benz vehicles, ensuring that your pedal feel remains consistent and that the fluid does not absorb moisture, which can lower the boiling point and lead to brake fade. Additionally, the power steering system benefits from synthetic fluid that prevents seal hardening, a common issue in aging vehicles that can lead to leaks and noisy operation.
Model History and Performance
The 1987 Mercedes-Benz 560SEC is a pinnacle of the W126 chassis, often regarded as one of the most luxurious and robust sedans of the 1980s. Produced from 1981 to 1991, this model represents the final evolution of the S-Class before the introduction of the W140. The “SEC” designation stands for Sport Coupé Elegance Class, indicating its two-door coupe body style. It features a long wheelbase and a wide track, providing a stable and commanding road presence that distinguishes it from the four-door sedans. The car is powered by the M117 engine, a 5.6-liter V8 that is renowned for its smooth power delivery and exceptional durability. While it lacks the forced induction of modern engines, its naturally aspirated design offers linear power and a distinct, refined exhaust note that enthusiasts cherish.
Ownership of a 1987 560SEC often involves a balance of classic automotive preservation and practical daily use. These vehicles are known for their heavy build quality, featuring a rigid unibody construction that provides excellent crash protection and noise insulation. Inside, the cabin is a sanctuary of wood, leather, and chrome, offering a level of craftsmanship that is rarely seen in modern vehicles. The driving character is characterized by a sense of grandeur and ease; it is a car that consumes the road, soaking up imperfections and gliding with effortless momentum. For many owners, it is a statement of understated wealth and engineering excellence.
However, maintaining this classic requires awareness of specific common issues that can plague these older European machines. One prevalent problem is oil consumption, where older seals and piston rings may allow oil to burn off, necessitating frequent top-offs. Using high-quality synthetic oil can help mitigate this by reducing carbon buildup and maintaining better ring sealing. Another issue is valve stem seal leakage, which can lead to oil dripping onto the exhaust or into the combustion chamber, causing blue smoke. The robust additive packages in AMSOIL oils can help slow this process. A third common concern is transmission shudder or harsh shifting, often caused by degraded factory fluid and accumulated sludge in the torque converter. Switching to a premium synthetic transmission fluid can resolve these issues and improve shift quality. Finally, cooling system corrosion is a significant risk due to the age of the hoses and gaskets. High-mileage vehicles often suffer from leaks or overheating due to degraded coolant properties; using a premium antifreeze with superior corrosion inhibitors can extend the life of the cooling system and prevent costly engine damage.
Ultimately, the 1987 Mercedes-Benz 560SEC is a vehicle that rewards conscientious ownership. By adhering to a rigorous maintenance schedule using premium synthetic lubricants, owners can ensure that this iconic luxury coupe continues to perform with the elegance and reliability that it was built to deliver. Whether you are cruising the coast or navigating city streets, the right fluids are the foundation of a successful ownership experience.