The 1987 Audi 5000 Quattro with the 2.3-liter 5-cylinder engine (Engine Code NF 4) represents a milestone in automotive engineering, bringing quattro all-wheel-drive performance to a sophisticated sedan platform. Keeping this classic vehicle running smoothly requires specific lubricants that address its unique mechanical demands. While modern synthetic oils offer superior protection, the engine’s flat-tappet cam design and the vehicle’s age demand high-zinc formulations and fluids that resist the thermal stress of a system pushed to its limits. Proper lubrication extends the life of the powertrain, prevents costly wear, and ensures the driving dynamics the Quattro is known for remain intact.
Recommended AMSOIL Products
For the 1987 Audi 5000 Quattro 2.3L, selecting the right oil and filter is the most critical maintenance step. The engine requires a capacity of 5.0 quarts when the filter is changed. The following AMSOIL products are specifically formulated to meet or exceed the requirements for this vehicle:
- AMSOIL Premium Protection 10W-40 100% Synthetic Motor Oil – An ideal choice for this engine, featuring a high-zinc formula that guards against wear on flat-tappet cams while resisting deposits to keep the engine clean.
- AMSOIL Extended-Life 10W-40 100% Synthetic Motor Oil – Offers up to 20,000 miles of guaranteed protection between changes, providing 37% more cleaning power to maintain engine smoothness.
- AMSOIL 5W-40 MS 100% Synthetic European Motor Oil – Designed specifically for the unique demands of European gasoline, diesel, and hybrid vehicles with a precise blend of synthetic base oils and premium additives.
- AMSOIL Oil Filter – Provides 99% filtering efficiency at 20 microns and offers extended service life, helping to reduce engine wear by capturing smaller contaminants than competing filters.
Engine Oil and Filter Specifications
The engine of the 1987 Audi 5000 Quattro is a robust 2.3-liter inline-five that operates at higher temperatures than many of its contemporaries. The manual specifies a capacity of 5.0 quarts, which includes the filter. Owners should ensure the oil drain plug is torqued to 29 ft/lbs after draining and refilling. It is also crucial to check the oil level immediately after refilling to ensure proper lubrication of the moving parts.
Among the three primary oil options, the AMSOIL Premium Protection 10W-40 is particularly well-suited for this application due to its high-zinc content, which is essential for protecting older engines with flat-tappet camshafts that can suffer from wear if using low-zinc modern oils. For those looking to maximize the interval between oil changes, the AMSOIL Extended-Life 10W-40 offers exceptional stability and cleaning power. Alternatively, the AMSOIL 5W-40 MS provides a European-formulated solution that mimics the original equipment specifications while adding modern synthetic durability.
Complementing the oil is the AMSOIL Oil Filter. This component is vital for capturing wear-causing contaminants that accumulate over time. With a capacity for smaller particles and lower restriction, it allows the engine to breathe easier and maintain optimal lubrication throughout the service interval.
Transmission and Transfer Case Lubrication
Handling the power of the engine requires a robust transmission and transfer case system. The 1987 Audi 5000 Quattro utilizes a manual transmission that requires specific fluid for smooth shifting and longevity. For the manual transmission, the system requires 4.6 pints of fluid. This capacity includes the final drive, ensuring that all moving gears within the transmission and transfer case are adequately lubricated.
The recommended fluid for this application is AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube. This synthetic gear lube is friction-modified to ensure excellent compatibility with seals and brass synchronizers, which is critical for smooth shifting in older manual gearboxes. It offers outstanding cold-flow properties and protects against the increased heat and pressure generated during spirited driving. Its long service life helps inhibit rust and corrosion, extending the life of the transmission components.
For the differential, the system requires a rear capacity of 3.6 pints. While the specific fluid type depends on the exact configuration, AMSOIL Synthetic Gear Lubricants provide advanced protection against wear and thermal runaway. Options include the AMSOIL SEVERE GEAR 80W-90 100% Synthetic Gear Lube, which is excellent for limited-slip applications, or the AMSOIL SEVERE GEAR 75W-90 100% Synthetic Gear Lube and AMSOIL SEVERE GEAR 75W-110 100% Synthetic Gear Lube for broader temperature ranges and heavy-duty protection. These fluids contain friction modifiers to help reduce operating temperatures and protect against rust, ensuring the differential operates smoothly for the long haul.
Cooling System and Brake Fluid
Maintaining the correct thermal balance is crucial for the longevity of the engine. The cooling system for the 1987 Audi 5000 Quattro holds a capacity of 8.5 quarts. Using the correct antifreeze and coolant is essential to prevent corrosion, which can be a significant issue in older vehicles with aging radiators and metal components.
The recommended coolant is AMSOIL Passenger Car & Light Truck Antifreeze & Coolant. This unique poly-organic acid (OAT) formulation allows for use in a wide variety of vehicles and is engineered to exceed original equipment manufacturer requirements. It protects all cooling system metals, gaskets, and hoses, and is phosphate- and silicate-free to prevent deposit buildup. For a concentrated solution that requires mixing with distilled or high-quality water, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant offers protection up to 150,000 miles or 5 years.
Brake fluid is another critical fluid that degrades over time, absorbing moisture which can lead to corrosion and reduced braking performance. The recommended fluid for the hydraulic brake system is AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid. This fluid provides excellent ABS and traction-control responsiveness and maintains a stable viscosity over a wide temperature range, ensuring consistent braking performance regardless of the weather.
Additional Fluids and Additives
Beyond the major mechanical components, the 1987 Audi 5000 Quattro benefits from proper care of its auxiliary systems. The power steering system, which often requires specific fluid to maintain seal integrity, is best served by AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid. This synthetic fluid reduces friction, keeps seals soft to prevent leaks, and resists heat for long fluid life.
For owners planning to store the vehicle or run it on older fuel, the AMSOIL P.i. Performance Improver Gasoline Additive can restore up to 14% horsepower and clean GDI fuel injectors. If the vehicle is being stored for a period, the AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, protecting against varnish and gum buildup. Additionally, the AMSOIL Engine Fogging Oil is an effective rust preventive for internal components during storage.
About the Vehicle: The 1987 Audi 5000 Quattro
The 1987 Audi 5000 Quattro is a significant model in the history of the Volkswagen Group, representing the culmination of Audi’s early innovation in all-wheel-drive technology. Launched as part of the C3 generation (Volkswagen Passat platform), the 5000 Quattro was one of the first mainstream sedans to offer permanent four-wheel drive as standard. This specific model year features the 2.3-liter inline-five-cylinder engine, a powerplant known for its smooth power delivery and distinctive exhaust note. The “quattro” system in this vehicle was a mechanical all-wheel-drive setup, different from the computer-controlled systems found in later models, delivering power to the rear wheels through a center differential that could send up to 70% of the power there under normal conditions, with a bias toward the front when slip was detected.
Owners of the 1987 Audi 5000 Quattro often cite the vehicle’s superior handling and traction in adverse weather as its primary appeal. The car was designed with a focus on safety and performance, featuring a robust chassis that could handle the added weight of the drivetrain without compromising ride quality significantly. The 2.3L engine, while not a high-revving sports unit, provided ample torque for a sedan of its size, making it a capable touring car. The vehicle’s reputation is further bolstered by its status as a pioneer in all-wheel-drive sedans, influencing future designs across the automotive industry.
However, owning a 1987 Quattro today comes with specific maintenance challenges that are common to vehicles of this era. One of the most frequent issues is engine oil consumption, which can be exacerbated by worn piston rings or valve guides common in high-mileage engines. Using a high-zinc synthetic oil like the AMSOIL Premium Protection 10W-40 can help mitigate wear and seal minor gaps. Another common problem involves the cooling system; rubber hoses and metal radiators degrade over time, making a high-performance antifreeze like the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant essential for preventing overheating and corrosion.
Differential and transmission wear are also prevalent in older Quattros, particularly if the vehicle has seen heavy use or neglect. The mechanical all-wheel-drive system places significant stress on the gears and bearings. Switching to a high-quality synthetic gear lube like the AMSOIL SEVERE GEAR line can reduce friction and heat, extending the life of these components. Finally, brake fluid degradation is a safety concern that is often overlooked. Moisture absorption in the brake lines can lead to spongy pedals and corrosion of the calipers. Regular flushing with a high-performance synthetic brake fluid ensures that the braking system remains responsive and safe, preserving the driving dynamics that made the 5000 Quattro a legend.