Proper lubrication is the cornerstone of keeping a classic vehicle like the 1987 Lincoln Town Car running smoothly for decades. This full-size sedan, equipped with the robust 5.0L (302 cubic inch) V8 engine, was designed for comfort and long-distance cruising, but it requires specific fluids to handle its age and mileage. Using the correct synthetic oils and filters helps mitigate wear, prevents sludge buildup common in older engines, and ensures that transmission and braking systems remain reliable. This guide outlines the exact AMSOIL products and fluid capacities needed to maintain this American classic in peak condition.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Offers unsurpassed engine protection against horsepower loss and wear, with guaranteed protection for up to 25,000 miles or 1 year.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Delivers extended protection for up to 20,000 miles with 37% more cleaning power to help keep older engines running smoother.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A budget-friendly option that fights sludge and deposits, providing reliable protection for up to 10,000 miles.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically formulated for vehicles over 75,000 miles, reducing sludge and boosting detergent levels to extend engine life.
- AMSOIL Oil Filter – Provides 99% filtering efficiency at 20 microns, allowing lower restriction to keep engine parts lubricated and reducing wear on critical components.
- WIX Oil Filter – A premium aftermarket alternative offering improved media over original equipment manufacturer branded filters.
- WIX Air Filter – Ensures clean airflow to the engine with premium media for better filtration than stock options.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique OAT formulation providing protection up to 150,000 miles or 5 years for the 13.7-quart cooling system.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option for extended protection against corrosion, erosion, and freeze damage.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing and elevated temperatures, keeping the AOD transmission fluid in sub-zero conditions.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Excellent for regular service, promoting smooth, shudder-free shifts while guarding against leaks.
- AMSOIL Torque-Drive® 100% Synthetic Automatic Transmission Fluid – Fights thermal and oxidative degradation for long oil life in automatic transmissions.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – The top choice for rear differentials, controlling thermal runaway and protecting against rust.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – A lighter viscosity option for limited-slip applications, containing friction modifiers to prevent chatter.
- AMSOIL SEVERE GEAR® 75W-110 100% Synthetic Gear Lube – Designed for extreme load conditions, ensuring reliable lubrication for rear axles with limited-slip differentials.
- 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.
- AMSOIL Super Shift® Racing Transmission Fluid – Resists extreme heat to virtually eliminate slippage, suitable for power steering and automatic transmission applications.
- AMSOIL P.i.® Performance Improver Gasoline Additive – Restores up to 14% horsepower and cleans fuel injectors to improve fuel economy and reduce pre-ignition.
The 5.0L V8 engine found in the 1987 Lincoln Town Car requires a specific oil capacity of 5 quarts, including a filter change. The drain plug torque should be set between 15 and 25 ft/lbs. Regular maintenance using synthetic motor oil is critical because these engines, having accumulated significant mileage over the last few decades, are prone to oil thickening and sludge formation in the valve train and oil pump. The AMSOIL Signature Series, for instance, provides 75% more engine protection against horsepower loss and wear compared to conventional oils, helping to maintain the compression and efficiency of the older piston rings and valve guides.
Beyond the engine, the cooling system holds approximately 13.7 quarts of coolant. The AOD automatic transmission in this model has a total fill capacity of 12.3 quarts, with an initial fill of just 3 quarts, so precise measurement is essential to avoid overfilling which can lead to seal damage. The rear differential, specifically the 8.8 RG model common in this era, requires 4.6 pints of gear lube. Whether the differential has a limited-slip clutch pack or is a standard open gear, using a synthetic gear lube with friction modifiers prevents the “chatter” or binding often felt when turning at low speeds in older units. This fluid also helps lower operating temperatures, which is vital for a vehicle that may not be driven daily, preventing rust and corrosion in the rear axle housing.
For the braking system, the recommended fluid meets Ford specification WSS-M6C65-A1. AMSOIL DOT 3 and DOT 4 synthetic brake fluid ensures that the hydraulic system remains responsive even after years of moisture absorption, which can lower the boiling point of standard DOT 3 fluid and lead to brake fade. Additionally, the power steering system in the 1987 Town Car is designed to work with fluid meeting Type-F specifications. Using AMSOIL Super Shift Racing Transmission Fluid in the power steering system helps eliminate slippage and improves steering feel, which can become sluggish as seals harden over time.
Vehicle Background
The 1987 Lincoln Town Car represents the peak of American full-size luxury sedans. Built on the Fox platform, which it shared with the Ford Crown Victoria and Mercury Grand Marquis, this vehicle was engineered primarily for rear-wheel-drive comfort and durability. Unlike the smaller, front-wheel-drive cars that dominated the 1980s import market, the Town Car offered a plush, spacious interior with a focus on sound isolation and a smooth, quiet ride. It was the epitome of the “land yacht” era, designed for long highway commutes and executive transport, often serving as a staple for police fleets and limousine conversions.
The specific model highlighted here is equipped with the 5.0L (302 cubic inch) 8-cylinder engine, code [F] 1. This engine is a carbureted V8 that delivers torque and reliability rather than high-revving performance. It was known for being relatively simple to work on, which is a significant advantage for owners maintaining a vintage vehicle today. The vehicle’s market position was firmly at the top end of the Ford Motor Company lineup, offering premium features like air conditioning, power windows, and upgraded upholstery compared to its Ford counterparts.
Despite its robust construction, the 1987 Lincoln Town Car is not without its common issues, many of which can be mitigated through proper synthetic lubrication. One frequent problem is carbon buildup and valve guide wear in the V8 engine, particularly if the vehicle has sat for long periods or was previously run on lower-quality oils. Switching to a high-mileage synthetic motor oil can help seal small leaks and clean up deposits, extending the life of the piston rings and valve seals. Another common issue involves the AOD (Automatic Overdrive) transmission, which can develop shuddering or harsh shifts as it ages. Using a high-quality synthetic transmission fluid like AMSOIL Signature Series Multi-Vehicle ATF can rejuvenate the friction plates and help restore smooth shift quality.
Furthermore, rear differential noise and limited-slip clutch binding are typical complaints in these models due to the age of the gears and the breakdown of the original gear lubricant. The 8.8 RG rear axle benefits significantly from a fresh fill of AMSOIL SEVERE GEAR Synthetic Gear Lube, which reduces noise and protects against rust. Finally, the cooling system in these older cars often suffers from corrosion and leaks due to degraded antifreeze. Regular flushing and the introduction of a modern phosphate-free OAT coolant ensures that the aluminum and copper components of the radiator and heater core remain protected, preventing overheating that can warp cylinder heads. Addressing these maintenance areas ensures that this classic sedan remains a reliable and comfortable mode of transportation.
By selecting the right AMSOIL products, owners can preserve the integrity of their 1987 Lincoln Town Car. Whether it is the 25,000-mile protection of the Signature Series motor oil or the superior thermal stability of the Torque-Drive transmission fluid, these synthetic lubricants provide a level of performance that exceeds the original equipment specifications. This approach not only maintains the vehicle’s comfort but also enhances its longevity, allowing the next generation of enthusiasts to enjoy the ride of a lifetime.