The 2022 BMW 840i, equipped with the 3.0L 6-cylinder B58B30M0B turbocharged engine, represents a pinnacle of German engineering, blending luxury with high-performance driving dynamics. However, to maintain the precise tolerances and advanced features of this sophisticated powerplant, owners must adhere to strict fluid specifications. Using the correct lubricants is not merely a recommendation but a necessity for preserving the engine’s longevity, maintaining peak fuel economy, and preventing costly wear on internal components. The B58 engine’s turbocharged nature subjects it to extreme thermal stress, while its variable valve timing and direct injection systems require oils that offer superior flow characteristics and cleaning properties. This guide outlines the specific AMSOIL fluids, filters, and additives tailored to meet the rigorous demands of the 2022 BMW 840i.
Recommended AMSOIL Products
- AMSOIL 0W-20 LS 100% Synthetic European Motor Oil – Specifically designed for the unique demands of gasoline, diesel, and hybrid European vehicles with precise synthetic blends.
- WIX Oil Filter – Premium filtration media offering improvements over original equipment manufacturer-branded filters to protect the engine.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique OAT formulation providing protection up to 150,000 miles and compatibility with all cooling system metals.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option that greatly surpasses standards for metallic corrosion and erosion protection.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands the rigors of heavy towing, elevated temperatures, and provides reserve protection during heavy use.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Offers excellent ABS and traction-control responsiveness with stable viscosity over a wide temperature range.
Engine Oil and Filtration for the B58 Engine
The heart of the 2022 BMW 840i is the B58B30M0B turbocharged inline-six engine. This powerplant is engineered for responsiveness and efficiency but operates under significant heat and pressure. To counteract these conditions, AMSOIL recommends the 0W-20 LS 100% Synthetic European Motor Oil. This formulation is distinct from general-purpose synthetic oils as it features a precise blend of synthetic base oils and premium additives designed specifically for the exacting standards of European manufacturers.
For the 2022 BMW 840i, the recommended oil grade is 0W-20, suitable for all temperature ranges. The total fluid capacity, including a filter change, is approximately 6.9 quarts. After the refill process, it is critical to check the oil level to ensure proper lubrication. When securing the drain plug, a torque of 18 ft/lbs is required, and the seal should always be replaced to prevent leaks. The oil filter recommended for this service is the WIX Oil Filter, which utilizes premium media to capture contaminants more effectively than standard OEM filters, ensuring the B58 engine receives clean oil throughout its operation.
Transmission and Differential Lubrication
The 840i is powered by the GA8HP51Z 8-speed automatic transmission. Maintaining this complex gearbox is crucial for smooth shifting and long-term reliability. The total fill capacity for the automatic transmission is 9.8 quarts. For optimal performance and protection against wear, sludge, and temperature-related issues, AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is the ideal choice. This fluid remains fluid in sub-zero temperatures while withstanding the elevated heat generated during spirited driving or towing. It provides a reserve of protection that is particularly beneficial for the precise valve bodies and clutches found in BMW’s automatic transmissions.
Regarding the differential or transfer case, the source documentation indicates no specific product recommendations for this configuration, suggesting owners follow standard maintenance procedures or OEM specifications for those components if service is required.
Cooling System and Brake Fluid
The cooling system in the BMW 840i requires a coolant capable of protecting all metals, gaskets, and hoses against corrosion. The capacity for the coolant system varies slightly depending on the specific equipment code. For the general system, the capacity is approximately 7.3 quarts. However, with equipment code SA8238, the capacity is 8.5 quarts, and for the low-temperature cooling circuit (LTCC), it is 3.2 quarts. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a phosphate-, nitrate-, and silicate-free ethylene glycol 50/50 pre-mix that meets these requirements, offering protection for up to 150,000 miles or 5 years. Alternatively, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant is a concentrated option that requires mixing with distilled water, offering extended protection for severe applications.
For the braking system, which is integral to the safety of this high-performance coupe, AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is recommended. BMW typically specifies low viscosity DOT 4 fluids. This synthetic brake fluid ensures excellent responsiveness for ABS and traction control systems. It maintains a stable viscosity across a wide temperature range, preventing brake fade and ensuring consistent pedal feel. It is compatible with the BMW P/N 83 13 0 443 024 (0.5L) or 83 13 0 443 026 (1.0L) specifications.
Fuel System Care and Additives
To maximize the efficiency and power output of the 3.0L turbocharged engine, keeping the fuel injectors clean is vital. The B58 engine utilizes direct injection, which can be prone to carbon buildup over time. AMSOIL P.i. Performance Improver Gasoline Additive is designed to restore fuel injectors to 100% flow rate after just one tank of fuel. It helps restore up to 14% horsepower, improves fuel economy, and reduces the need for costly higher-octane fuel. Additionally, for seasonal storage, AMSOIL Gasoline Stabilizer can be used to keep fuel fresh for up to 12 months, protecting the vehicle from varnish and gum buildup caused by ethanol corrosion.
Recommended Additional Protection
For owners looking to provide comprehensive care for their BMW 840i, AMSOIL offers a range of other protective products. The AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor lubricates the fuel system and upper cylinders, compatible with capless fuel systems. For general vehicle maintenance, the AMSOIL Synthetic Multi-Purpose Grease offers long-term performance with excellent low-temperature pumpability. For cleaning, AMSOIL Heavy-Duty Degreaser effectively removes grease, dirt, and grime from engine surfaces, while AMSOIL Brake and Parts Cleaner ensures brake components are free of oil and contaminants. Exterior and interior protection can be managed with the AMSOIL Exterior Ceramic Spray for UV protection and the AMSOIL Interior Detailer for 90-day UV protection on surfaces.
Why Proper Lubrication Matters for This Engine
Proper lubrication is the lifeblood of the 2022 BMW 840i. The B58 engine’s compact design and turbocharging system generate intense heat that can degrade conventional lubricants rapidly. Using a high-quality synthetic motor oil like AMSOIL LS 0W-20 ensures that the engine maintains optimal viscosity even under extreme thermal stress. This prevents the thinning of the oil film that leads to metal-to-metal contact, thereby reducing wear on critical components like the turbocharger bearings, piston rings, and camshaft phasers. Furthermore, the high shear stability of AMSOIL products ensures that the oil’s protective properties remain intact even after extended periods of driving, allowing for extended oil change intervals without sacrificing protection. This is particularly important for owners who engage in spirited driving or track use, where the engine is subjected to sustained high RPMs and heavy loads. By using the recommended fluids, owners not only protect their investment but also ensure the vehicle delivers the smooth, responsive performance characteristic of BMW engineering.
About the Vehicle
The 2022 BMW 840i sits at the intersection of luxury and performance, belonging to the prestigious 8 Series lineup. This model represents the grand tourer segment, designed for drivers who demand both high-speed capability and the comfort required for long-distance travel. The 840i is powered by the renowned B58 3.0-liter inline-six turbocharged engine, which is celebrated for its smooth power delivery, strong mid-range torque, and reliability. The vehicle’s architecture benefits from a lightweight aluminum chassis and a sophisticated rear-wheel-drive or all-wheel-drive (xDrive) setup, ensuring precise handling and stability on the open road.
Owners of the 2022 BMW 840i appreciate its blend of athletic design and everyday usability. The exterior styling features bold, sweeping lines and a distinctive kidney grille, while the interior offers a driver-focused cockpit with high-quality materials and advanced technology, including the latest iDrive infotainment system. The car is often praised for its quiet cabin, which effectively isolates occupants from road noise, providing a serene environment for long drives. It is a vehicle that appeals to those who value engineering excellence and want a car that is as comfortable in city traffic as it is on a winding mountain pass.
Despite its robust design, the 840i, like any complex modern vehicle, can face specific issues that can be mitigated with the right maintenance practices. One common concern for BMW vehicles is the potential for carbon buildup in the intake valves, a byproduct of direct injection systems. Regular use of fuel system cleaners like AMSOIL P.i. can help manage this buildup, maintaining engine efficiency and preventing power loss. Another potential issue involves the cooling system, which can be susceptible to leaks or degradation over time; using a high-quality antifreeze like the AMSOIL OAT formulations can extend the life of the system and prevent corrosion. Additionally, the high-performance nature of the vehicle places significant stress on the transmission, particularly under hard acceleration; the use of a robust synthetic transmission fluid helps maintain smooth shifts and protects internal components from premature wear. Finally, the brake system in a performance car must remain consistent over time; synthetic brake fluid helps prevent the absorption of moisture, which can lower the boiling point of the fluid and lead to brake fade during spirited driving. By addressing these areas with high-performance lubricants, 840i owners can ensure their vehicle remains a reliable and enjoyable driver for years to come.