Maintaining the optimal performance of your 2018 Audi S5 with its 3.0L turbocharged V6 engine requires a commitment to premium lubricants. This high-performance vehicle operates under significant thermal and mechanical stress, particularly in the turbocharger and the direct-injection fuel system. Using the correct viscosities and specifications ensures that engine components are properly lubricated during rapid acceleration and extreme temperature fluctuations. Proper fluid maintenance not only extends the service life of your powertrain but also maximizes fuel efficiency and protects against the unique wear patterns associated with European engineering.
Recommended AMSOIL Products
- AMSOIL 0W-20 LS-VW 100% Synthetic European Motor Oil – Engineered specifically for gasoline, diesel, and hybrid European vehicles, this oil features a precise blend of synthetic base oils and premium additives designed to meet strict Audi and Volkswagen standards. It provides superior protection for the 3.0L engine, ensuring reliable performance in extreme temperatures and supporting extended drain intervals.
- MANN-FILTERS Oil Filter – This premium filtration system offers improvements over original equipment manufacturer (OEM) branded filters. Utilizing advanced media, it captures contaminants more effectively to protect the engine and maintain oil flow, ensuring the full capacity of your 7.6-quart oil system remains clean and functional.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique poly-organic acid (OAT) formulation that protects the cooling system against corrosion, erosion, and cavitation for up to 150,000 miles or 5 years. This pre-mixed 50/50 formulation is compatible with all metals, gaskets, and hoses, safeguarding the complex cooling needs of the turbocharged engine.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Designed to withstand the rigors of heavy towing, elevated temperatures, and challenging terrain, this fluid provides reserve protection during heavy use. It remains fluid in sub-zero temperatures and offers superior wear protection for the 8-speed automatic transmission compared to traditional fluids.
- AMSOIL 75W-90 Long Life 100% Synthetic Gear Lube – Specifically engineered for high-load gear and bearing protection, this lubricant improves cold-weather shifting and enhances seal life. It provides exceptional rust and corrosion protection, ensuring the Quattro system’s differentials operate smoothly under heavy load.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – This fluid delivers excellent ABS and traction-control responsiveness with stable viscosity across a wide temperature range. It helps prevent moisture absorption and boil-over conditions, ensuring consistent braking performance in all driving scenarios.
- AMSOIL P.i. Performance Improver Gasoline Additive – A powerful fuel system cleaner that restores up to 14% horsepower and brings GDI fuel injectors back to 100% flow rate. It effectively removes deposits, controls pre-ignition knock, and reduces the need for higher-octane fuel, keeping the direct injection system clean.
The maintenance of a 2018 Audi S5 is not merely about meeting minimum factory specifications; it is about enhancing the driving experience and preserving the vehicle’s engineering integrity. The engine oil capacity for this 3.0L 6-cylinder engine with the CWGD B Turbo code is 7.6 quarts when including a filter replacement. Following the proper torque specification of 22 ft/lbs for the oil drain plug and replacing the drain plug seal are critical steps often overlooked by DIY enthusiasts. Ensuring the oil level is checked after refilling is a simple but vital procedure to prevent overfilling, which can lead to foaming and reduced lubrication efficiency.
Beyond the engine, the cooling system in this high-output vehicle requires robust protection. The total coolant capacity is 10.6 quarts. Choosing between the ready-to-use Passenger Car & Light Truck Antifreeze or the concentrated Propylene Glycol Antifreeze allows owners to tailor their maintenance to their specific needs. The OAT formulation found in these products is free of phosphates, nitrates, and other additives that can damage cooling system components over time. This compatibility ensures that the delicate radiators and heaters within the S5 remain free from sludge buildup and corrosion.
The transmission system in the S5, an 8-speed automatic, places significant demands on the fluid. Whether you are navigating city traffic with frequent stops or pushing the vehicle to its limits on a winding road, the fluid must maintain its viscosity and frictional properties. The AMSOIL Signature Series Automatic Transmission Fluid is formulated to provide a buffer against thermal degradation, which is a common issue in high-torque applications. By using a fluid that resists oxidation and shear, you help maintain the smooth shifting characteristics that define the Audi driving experience.
About the Vehicle
The 2018 Audi S5 represents the perfect blend of luxury sedan comfort and high-performance sports coupe dynamics. Built on the Volkswagen Group’s MLB Evo platform, which it shares with the Audi A5 and A7, the S5 offers a sophisticated chassis that balances handling agility with ride quality. The star of the show is undoubtedly the 3.0-liter supercharged V6 engine in earlier generations, but for the 2018 model year, Audi transitioned the S5 to a twin-scroll turbocharged 3.0L V6, producing substantial horsepower and torque figures that rival many sports cars. This engine, known for its smooth power delivery and responsive turbo characteristics, is paired with an 8-speed Tiptronic automatic transmission and the renowned Quattro all-wheel-drive system. This drivetrain ensures that power is distributed to the wheels with maximum traction, making the S5 a capable performer in adverse weather conditions as well as on dry pavement.
Owners of the 2018 S5 often appreciate the vehicle’s understated elegance. Unlike the more aggressive styling of the RS5, the S5 maintains a sleek, refined appearance that can pass as a standard A5 to the untrained eye. Inside, the cabin features high-quality materials, intuitive infotainment systems, and a driver-focused cockpit typical of Audi’s design philosophy. The interior is spacious enough to accommodate four adults comfortably, making it a practical daily driver despite its performance credentials. The blend of luxury and utility has made the S5 a perennial favorite among enthusiasts who refuse to compromise on either style or substance.
Despite the robust engineering of the 2018 Audi S5, like any performance vehicle, it has specific areas where synthetic lubricants can make a significant difference in longevity and reliability. One common issue faced by owners of this generation is turbocharger wear and oil degradation. The high operating temperatures of the twin-scroll turbocharger can cause conventional oils to break down more quickly, leading to sludge buildup and restricted oil flow to the turbo bearings. AMSOIL synthetic motor oils, with their superior thermal stability and resistance to oxidation, help mitigate this risk, ensuring the turbo bearings remain clean and properly lubricated even after extended periods of high-load driving or towing.
Another area of concern is the Direct Injection (GDI) fuel system. Over time, carbon deposits can accumulate on the intake valves and fuel injectors, leading to rough idling, reduced power, and increased fuel consumption. The AMSOIL P.i. Performance Improver is specifically designed to clean these systems, restoring fuel injector flow and reducing the carbon buildup that plagues many GDI engines. By regularly using this additive, owners can prevent the performance degradation often seen in high-mileage S5s and maintain the engine’s original responsiveness.
The Quattro all-wheel-drive system also presents unique lubrication challenges. The front and rear differentials operate under constant load, especially in slippery conditions. Conventional gear lubricants may not provide sufficient protection against the extreme pressure and shear forces encountered in these components. Using a high-quality synthetic gear lube like the 75W-90 Long Life formula ensures that the gears and bearings are protected against wear and rust, extending the life of the drivetrain components and preventing the noise or vibration that can occur as lubricants degrade.
Finally, the cooling system is critical for the longevity of the twin-scroll turbo engine. Overheating or corrosion within the cooling system can lead to catastrophic engine failure or costly repairs to the turbocharger. The high-performance antifreeze formulations available ensure that the coolant maintains its boiling point and freezing point well beyond the capacity of standard coolants. This protection is vital for owners who push their vehicles in extreme temperatures or who engage in spirited driving that generates significant heat. By addressing these specific points of wear with the right lubricants, S5 owners can ensure their vehicle remains a reliable and exhilarating companion for years to come.
In conclusion, the 2018 Audi S5 is a remarkable vehicle that demands nothing less than the best in automotive fluids. Whether you are concerned with the performance of the turbocharger, the cleanliness of the fuel injectors, or the reliability of the all-wheel-drive system, AMSOIL provides the comprehensive lubrication solutions needed to protect your investment. By adhering to the recommended capacities and using the high-performance products outlined in this guide, you are ensuring that your Audi S5 continues to deliver the dynamic driving experience and luxury comfort that define the brand.