Keeping your 2018 BMW M5 running at peak performance requires more than just a routine oil change; it demands precision-engineered fluids that can withstand the extreme thermal and mechanical stresses produced by its twin-turbocharged V8. The 4.4L S63B44T4 engine is a marvel of automotive engineering, delivering immense power that translates to high operating temperatures. Standard mineral oils simply cannot provide the film strength or thermal stability required for a vehicle of this caliber. Using high-quality synthetic lubricants ensures that every component from the turbochargers to the complex multi-clutch transmission receives optimal protection, extending the service life of critical systems while maintaining the vehicle’s legendary acceleration and handling characteristics.
Recommended AMSOIL Products
- AMSOIL 0W-30 MS 100% Synthetic European Motor Oil – Specifically formulated for the high-performance demands of European turbocharged engines like the BMW M5’s V8.
- WIX Oil Filter – Provides premium filtration media that offers superior protection over standard OEM filters, capturing contaminants effectively.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mixed solution designed to protect cooling system metals, gaskets, and hoses for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated formula that can be mixed to the desired ratio, offering excellent corrosion protection for heavy-duty use.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands the rigors of high-speed shifting and elevated temperatures found in the M5’s ZF 8HP transmission.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A fuel-efficient synthetic option that provides excellent wear protection for automatic transmissions.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Ensures stable viscosity and excellent responsiveness for the high-performance braking systems of the M5.
- AMSOIL P.i. Performance Improver Gasoline Additive – Restores fuel injectors and improves engine performance, helping to combat carbon buildup common in direct injection engines.
The engine in the 2018 BMW M5 is a 4.4-liter twin-turbo V8, and it places significant strain on lubrication systems. When you perform an oil change, you are replacing approximately 10.6 quarts of fluid, a capacity that includes the filter. It is crucial to ensure the correct torque of 30 ft/lbs is applied to the drain plug to prevent leaks or damage to the aluminum oil pan. After refilling, the oil level must be checked carefully to ensure it falls within the safe operating range. The specific viscosity recommended for all temperature ranges in this high-output engine is 0W-30. Using a fluid designed for European vehicles is not just a preference; it is a requirement to maintain the precise tolerances and thermal profiles of the S63 engine.
Beyond the engine, the transmission system in the M5 relies on sophisticated fluid dynamics to manage power delivery. The 8-speed automatic transmission requires a fluid that remains fluid in sub-zero temperatures while resisting breakdown under the extreme heat generated during track use or spirited driving. AMSOIL offers a Signature Series option that is specifically engineered to withstand heavy towing, elevated temperatures, and challenging terrain, making it a robust choice for this high-performance machine. There is also an OE Fuel-Efficient alternative available for those looking to maximize fuel economy while retaining the synthetic benefits necessary for the transmission’s longevity.
Cooling system maintenance is equally critical for the BMW M5. The engine operates at high temperatures, and the cooling system must be capable of dissipating this heat efficiently to prevent overheating and potential engine damage. The system capacity for the long-term coolant (LTCC) is 4.8 quarts, while the high-temp coolant (HTCC) capacity is 12.2 quarts depending on the specific configuration. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a poly-organic acid (OAT) formulation that provides protection for up to 150,000 miles or five years. It is phosphate, nitrate, nitrite, silicate, borate, and amine-free, ensuring compatibility with all cooling system metals and hoses. For those who prefer a concentrated formula, the Propylene Glycol Antifreeze and Engine Coolant offers extended protection up to 150,000 miles or 5 years in passenger cars, or even longer in heavy-duty applications.
Braking performance on a vehicle of this magnitude is paramount. The M5 comes equipped with high-performance braking systems that demand a fluid capable of maintaining a high boiling point to prevent vapor lock under heavy braking. AMSOIL’s DOT 3 and DOT 4 100% Synthetic Brake Fluid provides excellent ABS and traction-control responsiveness while maintaining a stable viscosity over a wide temperature range. This ensures that the braking power remains consistent and reliable, a critical safety feature for a car that can reach high speeds quickly.
Vehicle Background
The 2018 BMW M5 represents the pinnacle of high-performance sedans, blending track-ready capabilities with daily drivability. Built on the F90 generation, which is the first M5 to feature a twin-turbocharged 4.4-liter V8 engine, this vehicle has cemented its reputation as one of the most powerful and advanced sedans in the world. The S63B44T4 engine is a masterpiece of modern engineering, delivering over 600 horsepower and allowing the M5 to accelerate from 0 to 60 mph in under 3 seconds. The introduction of all-wheel drive in this generation provided even better traction and stability, making it a formidable competitor in the high-performance luxury sedan market.
Owners of the 2018 BMW M5 appreciate its versatility. It is a car that can be used for commuting to the office, running errands, or taking to the track for a weekend of spirited driving. The interior is crafted with high-quality materials, offering a luxurious environment that contrasts with the raw performance on offer. The driving character is unique, balancing the precision of a sports car with the comfort of a luxury cruiser. This duality makes it a favorite among automotive enthusiasts who refuse to compromise on either comfort or power.
However, with great power comes great responsibility, and the M5 is not without its known issues that owners should be aware of. One common concern involves the turbocharger oil feed lines, which can develop leaks over time due to the extreme heat and vibration. Using a high-quality synthetic oil with superior shear stability helps reduce the stress on these lines and minimizes the risk of leaks. Another potential issue is the carbon buildup on the intake valves, a common problem in direct injection engines that can affect performance over time. Regular maintenance with fuel additives designed to clean injectors and combustion chambers can help mitigate this buildup.
Furthermore, the complex transmission system can sometimes exhibit shuddering or harsh shifting if the fluid degrades. The fluid in the 8HP75 transmission is critical for the operation of the wet clutch packs and torque converter. Ensuring the use of a premium synthetic transmission fluid that meets the specific requirements of the ZF 8HP unit can prevent these shifting issues and extend the life of the transmission. Finally, owners may experience issues with the cooling system, such as coolant leaks from the plastic components of the thermostat housing or water pump. Maintaining a robust antifreeze mixture helps protect these components from corrosion and thermal expansion issues, ensuring the cooling system operates efficiently even under the most demanding conditions.
In conclusion, the 2018 BMW M5 is a vehicle that demands the best in terms of maintenance and care. By utilizing AMSOIL’s comprehensive line of synthetic lubricants and additives, owners can ensure that their M5 continues to deliver the performance and reliability it was designed for. From the engine oil that protects the twin turbos to the transmission fluid that manages the power delivery, every fluid plays a critical role in the vehicle’s longevity. Regular maintenance with these high-performance products not only protects the vehicle but also enhances the driving experience, allowing the owner to enjoy the full potential of this incredible machine.