To maintain the 560SL in peak condition, specific lubricants are required to handle the thermal and mechanical stresses of this classic Mercedes. The following products are formulated to meet or exceed the rigorous standards required for this vehicle.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – This oil is designed for the unique demands of European vehicles, offering precise temperature protection from -40°C to high summer heat, which is ideal for the 5.6L V8.
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – An excellent choice for temperatures above -25°C, this European formula features a blend of synthetic base oils and premium additives for superior engine cleanliness.
- MANN-FILTERS Oil Filter – A premium filtration solution that offers improvements over original equipment manufacturer (OEM)-branded filters to ensure the engine oil remains clean and flows freely.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mix formulation that protects all cooling system metals, gaskets, and hoses, suitable for the 13.7-quart capacity of this vehicle.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option that offers extended protection up to 150,000 miles or 5 years, free of phosphates and silicates that can harm older cooling systems.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Designed to withstand heavy towing and elevated temperatures, this fluid ensures smooth, shudder-free shifts for the 4-speed automatic transmission.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – A cost-effective option that resists sludge and guards against leaks while promoting smooth performance in the 722.3 transmission.
- 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, meeting MB Sheet 331.0 standards.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Helps seals remain soft to prevent leaks while resisting heat and providing excellent high-temperature protection for the steering system.
Understanding the specific requirements of the 1987 Mercedes-Benz 560SL is the first step in preserving its longevity. The vehicle utilizes an 8.5-quart capacity for engine oil when the filter is changed, with the oil drain plug requiring a torque of 18 ft/lbs. It is crucial to allow approximately five minutes after refilling or turning off the engine before checking the oil level to ensure an accurate reading. For models equipped with an oil cooler, additional oil may be necessary if the cooler is drained during service. In the cooling system, the vehicle requires 13.7 quarts of antifreeze. The automatic transmission system is a 4-speed unit (722.3) with a total fill capacity of 9.1 quarts and an initial fill of 8.1 quarts. The rear differential contains 2.7 pints of lubricant. These capacities are essential for maintaining proper fluid levels and ensuring that all components receive adequate lubrication.
Why Proper Lubrication Matters for the 560SL
The Mercedes-Benz 560SL was built with precision engineering that tolerates very little degradation in its lubricants. The 5.6-liter M117 V8 engine, identified by engine code 117.967.1, operates at high temperatures and relies on the stability of modern synthetic oils to prevent thermal breakdown. Traditional mineral oils used in the 1980s would break down faster under the stress of high heat and extended idling, which is common in classic car enthusiasts. AMSOIL 5W-40 FS and AMSOIL 0W-40 FS provide a protective barrier that resists oxidation and sludge formation, which are common issues in aging engines. Without proper lubrication, the valve train and piston rings can suffer from increased wear, leading to reduced compression and oil consumption.
Beyond the engine, the hydraulic systems in the 560SL, such as the power steering and brakes, rely on specific fluid properties to function safely. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid in these older vehicles is particularly sensitive to moisture absorption, which can lead to a spongy pedal feel and reduced braking performance. It offers a higher boiling point and better resistance to moisture compared to standard fluids, ensuring consistent performance in both hot summer driving and winter conditions. Similarly, the AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid plays a critical role in the longevity of the 4-speed gearbox, which can be prone to wear if the fluid degrades and loses its viscosity. It maintains its flow characteristics at extreme temperatures, ensuring smooth shifting and preventing the harsh clunks that often plague high-mileage vehicles.
About the Vehicle
The 1987 Mercedes-Benz 560SL represents the pinnacle of R107 chassis production, a model line that began in 1971 and ran until 1989. This era of the SL is often considered the last of the “classic” Mercedes convertibles, featuring the massive and powerful 5.6-liter V8 engine. Known for its distinct square headlights and chrome bumpers, the 560SL was designed for the American market where the demand for grand touring cars was at its height. It offered a unique combination of European handling dynamics and American comfort, making it a favorite among collectors and enthusiasts who appreciate a car that is as easy to drive on the highway as it is to enjoy on a sunny Sunday drive.
This vehicle is powered by the legendary M117 engine, a pushrod V8 that delivers smooth power and a distinct exhaust note. The chassis itself is known for its durability, capable of handling the rigors of long-distance travel while maintaining the structural integrity expected from a German luxury coupe. While the 560SL is not a high-speed sports car in the modern sense, it possesses a presence and road-holding capability that is highly respected. The interior is typically appointed with rich leather and wood trim, offering a sense of luxury that has only aged gracefully over the decades. Owners of this vehicle often describe it as a car that rewards patience and maintenance, providing a driving experience that is far removed from the frantic pace of modern traffic.
Despite its robust design, the 560SL is not without its common ailments, which can be effectively mitigated with the correct lubricants. One of the most prevalent issues is valve stem seal leakage, often resulting in blue smoke on startup or after idling. This wear is accelerated by heat and oil breakdown. Switching to a high-quality synthetic oil with excellent sealing additives can help reduce this consumption and extend the life of the seals. Another common problem involves the hydraulic system, specifically the power steering pump and seals. Over time, the seals can harden and shrink, leading to leaks and a noisy pump. AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid is formulated to keep these seals soft and pliable, preventing leaks and ensuring quiet operation. Additionally, the 4-speed automatic transmission is known to develop shudder issues or harsh shifts as the clutch packs wear or fluid degrades. Using a high-performance synthetic transmission fluid can smooth out these shifts and reduce the wear on the transmission bands. Finally, the cooling system in these older vehicles is susceptible to corrosion and degradation, which can lead to overheating and expensive damage to the aluminum components of the engine. A high-quality AMSOIL Propylene Glycol Antifreeze and Engine Coolant or AMSOIL Passenger Car & Light Truck Antifreeze & Coolant with robust corrosion inhibitors is essential to protect the cooling passages and prevent the buildup of rust that can clog the radiator and water pump.
Maintaining a 1987 Mercedes-Benz 560SL requires a commitment to using only the best fluids available. The engine, transmission, and hydraulic systems of this classic vehicle rely on the superior performance of synthetic lubricants to overcome the effects of age and wear. By selecting the right AMSOIL products, owners can ensure that their 560SL remains in excellent condition, preserving both its performance and its value for future generations of enthusiasts.