The 2016 Audi A8 Quattro with its 4.0L turbocharged V8 engine is a masterpiece of German engineering, designed for high performance and long-term durability. Proper lubrication is critical to maintaining the health of its complex systems, including the turbocharger, precision-machined internal components, and sophisticated quattro all-wheel-drive drivetrain. Using the correct synthetic fluids ensures that the vehicle operates at peak efficiency, withstands extreme temperatures, and extends the service intervals beyond factory recommendations.
Recommended AMSOIL Products
- AMSOIL 5W-40 MS 100% Synthetic European Motor Oil – This premium oil is specifically formulated to meet the rigorous European standards required by Audi and Volkswagen, offering superior protection for turbocharged engines against high heat and shear stress.
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – An excellent alternative viscosity for the 4.0L engine, this European formula ensures precise lubrication for the engine’s tight tolerances and variable valve timing systems.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – Ideal for extreme cold weather starting while providing the same robust high-temperature protection required for the turbocharged operation of the A8’s engine.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mixed glycol solution designed to protect the cooling system from corrosion and overheating, meeting or exceeding OEM specifications for European vehicles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated, non-ethylene glycol option that provides exceptional corrosion protection and boiling point elevation, ideal for long-life applications in complex cooling systems.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Formulated to withstand the demands of the 8-speed automatic transmission, offering superior friction control and thermal stability for smooth shifting and extended drain intervals.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A fuel-efficient formulation designed to protect transmission components while maintaining the precise shift characteristics required by Audi’s transmission control systems.
- AMSOIL 75W-90 Long Life 100% Synthetic Gear Lube – Essential for the differential and transfer case, this 75W-90 Long Life 100% Synthetic Gear Lube provides high-load protection and prevents rust and corrosion in the quattro system’s all-wheel-drive components.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – A high-performance DOT 3 and DOT 4 100% Synthetic Brake Fluid that resists moisture absorption and provides a stable viscosity across a wide temperature range, ensuring consistent pedal feel and optimal ABS performance.
Engine Oil and Filter Specifications
The heart of the 2016 Audi A8 Quattro is the 4.0-liter V8 engine, identified by engine code CTGF I. This turbocharged powerplant operates under significant stress and requires oil that can maintain viscosity and protect against sludge buildup. The manufacturer recommends a viscosity of 5W-40, though 5W-30, 0W-40, and 0W-30 are acceptable alternatives depending on the climate and season. It is vital to ensure that any oil used meets the specific Audi and Volkswagen oil quality standards, as these engines rely on precise additive packages for valve train wear protection and carbon control.
When performing an oil change, the total capacity for the system, including the oil filter, is approximately 9.2 quarts. After refilling the engine, it is essential to check the oil level to ensure it is correct before starting the vehicle. The oil drain plug torque specification is 15 foot-pounds, and the seal should always be replaced during the service to prevent leaks. While this guide recommends AMSOIL 5W-40 MS 100% Synthetic European Motor Oil, AMSOIL 5W-40 FS 100% Synthetic European Motor Oil, or AMSOIL 0W-40 FS 100% Synthetic European Motor Oil, owners should consult the specific product details to ensure compatibility with their driving habits and local climate conditions.
Cooling System Maintenance
Maintaining the thermal efficiency of the 4.0L turbocharged engine is paramount to its longevity. The cooling system capacity for the 2016 Audi A8 Quattro is substantial, requiring approximately 15.9 quarts of AMSOIL Passenger Car & Light Truck Antifreeze & Coolant. This volume allows for the efficient dissipation of heat generated by the high-output engine and the intercooled turbocharging system.
AMSOIL offers two primary options for this application. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant (ANTPC) is a 50/50 pre-mixed ethylene glycol solution that eliminates the need for mixing, reducing the risk of improper ratios. For those preferring a concentrated solution, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant (ANT) offers a non-ethylene glycol alternative that requires mixing with distilled water. Both formulations are designed to protect all cooling system metals, gaskets, and hoses, and they are free of phosphates, nitrates, nitrites, silicates, borates, and amines, ensuring compatibility with the vehicle’s cooling materials.
Transmission and Drivetrain Protection
The 2016 A8 Quattro is equipped with an 8-speed automatic transmission (0BK) and a sophisticated all-wheel-drive system that distributes power to all four wheels. Proper lubrication of these components is crucial for maintaining the “Quattro” reputation for traction and handling. The automatic transmission requires a fluid change, with an initial fill capacity varying between 3.6 and 4.2 quarts depending on the specific service procedure. For a total fill, the system capacity is approximately 9.1 quarts.
For the drivetrain, the front and rear differentials, as well as the transfer case, require specific gear lubrication. The capacity for the front differential with the 0BK system is approximately 1.9 pints, and the rear differential also holds 1.9 pints. Using a high-quality synthetic gear lube like AMSOIL 75W-90 Long Life 100% Synthetic Gear Lube ensures that the gears and bearings are protected against high loads and rust, while also improving cold-weather shifting and seal life. The fluid helps maintain the precise operation of the quattro system, ensuring smooth power delivery in all conditions.
Brake Fluid and Seasonal Care
Safety is a priority for any luxury sedan, and the braking system of the Audi A8 is no exception. The vehicle utilizes hydraulic brake fluid meeting DOT 4 standards. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is recommended to maintain peak braking performance. Its superior resistance to boiling and moisture absorption ensures that the ABS and traction-control systems function reliably, regardless of whether the vehicle is being driven in heavy traffic or on a demanding mountain road.
For owners who store the vehicle seasonally or during periods of extended inactivity, preserving the internal components is essential. AMSOIL offers specialized additives for these scenarios. The AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, protecting against varnish and gum buildup that can clog fuel injectors. Additionally, the AMSOIL Engine Fogging Oil is a highly effective rust preventive designed to coat internal engine components during storage, protecting the cylinders and rings from corrosion.
Additional Fuel System Care
To maintain optimal performance and fuel economy, the fuel system requires protection from carbon buildup. Direct Injection (GDI) engines, like the one in the A8, are particularly prone to carbon accumulation on intake valves. AMSOIL P.i.® Performance Improver is a gasoline additive designed to restore GDI fuel injectors to 100% flow rate after one tank of fuel, helping to restore up to 14% of horsepower lost to carbon deposits. This additive also helps prevent pre-ignition knock, a condition that can be harmful to high-compression turbocharged engines.
About the Vehicle
The 2016 Audi A8 Quattro represents the pinnacle of the luxury sedan market, offering a blend of high-performance engineering and opulent comfort. Built on the advanced MLB platform, the A8 is known for its lightweight aluminum construction, which contributes to its agile driving dynamics despite its substantial size. The vehicle is powered by the robust 4.0-liter V8 twin-turbocharged engine, which delivers a powerful and smooth driving experience, making it a favorite among those who demand performance without sacrificing ride quality.
The “Quattro” all-wheel-drive system is a hallmark of Audi’s heritage, providing unparalleled traction and stability in various weather conditions. This system sends power to all four wheels, adjusting the distribution in real-time to ensure optimal handling. Inside, the cabin is a sanctuary of luxury, featuring top-tier materials, advanced technology, and a focus on driver assistance that makes it as comfortable for a city commute as it is for a long highway journey. The 2016 model year continues the legacy of the A8 as a full-size luxury flagship, competing directly with other high-end sedans while offering a distinct blend of German precision and modern innovation. Owners of this vehicle appreciate its balance of power, technology, and refinement, making it a rewarding vehicle to drive and maintain.