The 2018 BMW 750i is a high-performance luxury sedan powered by the robust N63B44B 4.4-liter twin-turbocharged V8 engine. This sophisticated powerplant demands lubricants that can withstand extreme thermal loads, high boost pressures, and the rigorous demands of modern European engineering. While standard fluids may suffice for average driving, owners seeking maximum engine longevity, improved performance, and protection against common turbocharger issues will find that AMSOIL 0W-30 MS 100% Synthetic European Motor Oil offers a significant advantage. Proper fluid selection ensures that critical components remain protected from wear, corrosion, and sludge buildup, preserving the vehicle’s reputation for luxury and power.
Recommended AMSOIL Products
For the 2018 BMW 750i, the following AMSOIL products are specifically recommended to meet and exceed the factory requirements for the 4.4L engine and associated systems.
- AMSOIL 0W-30 MS 100% Synthetic European Motor Oil – Engineered for the unique demands of European vehicles, this oil features a precise blend of synthetic base oils and premium additives to protect the N63B44B engine under extreme conditions.
- WIX Oil Filter – Provides premium filtration media that outperforms original equipment filters, ensuring contaminants are removed efficiently to protect the engine’s delicate internal components.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A ready-to-use 50/50 ethylene glycol formulation that offers protection up to 150,000 miles, safeguarding the cooling system against corrosion and freezing.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option offering superior thermal stability and extended service life for drivers who prefer mixing their own AMSOIL Passenger Car & Light Truck Antifreeze & Coolant solutions.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Designed to withstand the rigors of the 8-speed transmission, providing excellent protection against wear, heat, and shift shock.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A cost-effective synthetic alternative that offers OE-approved protection for the transmission system without sacrificing performance.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers stable viscosity across a wide temperature range and ensures responsive ABS and traction control performance.
Understanding the specific fluid requirements for this vehicle is essential for maintaining its performance. The 2018 BMW 750i utilizes a complex engine cooling system that operates under significant stress due to the twin-turbocharged V8 architecture. The engine oil capacity for the 4.4L engine is 10.6 quarts when the filter is replaced. When performing a service, it is critical to use the correct torque specifications for the drain plug, which is 15 ft/lbs, and to replace the drain plug seal every time. For the cooling system, the High Temperature AMSOIL Propylene Glycol Antifreeze and Engine Coolant Capacity (HTCC) is 9.7 quarts, while the Low Temperature Coolant Capacity (LTCC) is 3.7 quarts. Using a high-quality coolant ensures that the aluminum components of the engine and transmission are protected against corrosion and thermal degradation.
The transmission in the 750i, typically the GA8HP75Z 8-speed automatic, requires specific attention. A total fill capacity for the transmission is 9.2 quarts. Using a dedicated synthetic automatic transmission fluid, such as AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid, helps maintain the integrity of the seals and the shifting mechanism. The 2018 BMW 750i brake system also demands high-performance fluid. While BMW part numbers like 81 22 0 142 156 are recommended, AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is an excellent alternative that provides superior boiling points and lower viscosity, ensuring consistent pedal feel and faster response times in critical situations.
Maintenance Intervals and Fluid Capacities
Adhering to a strict maintenance schedule is the most effective way to preserve the value and performance of the 2018 BMW 750i. With AMSOIL 0W-30 MS 100% Synthetic European Motor Oil and WIX Oil Filters, owners can often extend service intervals safely compared to conventional recommendations, reducing long-term maintenance costs and environmental waste. The engine oil change interval can be extended significantly due to the superior thermal stability and resistance to oxidation found in synthetic formulations.
In addition to the primary engine and transmission fluids, the vehicle’s differential and transfer case may require specific lubricants depending on the configuration. For the rear differential, the capacity is 1.9 pints. While the source data indicates specific capacities for cooling and transmission, it is vital to ensure that all fluid levels are checked regularly. The AMSOIL product line offers solutions for every fluid requirement, from the initial fill to complete system flushes. This comprehensive approach ensures that no part of the vehicle’s lubrication system is left vulnerable to degradation.
For those who engage in severe driving conditions, such as frequent towing, high-speed driving, or extreme cold weather operation, the extended protection offered by AMSOIL synthetic products becomes even more valuable. The high-temperature stability of the oil and transmission fluid prevents breakdown during heavy loads, while the low-temperature flow ensures rapid lubrication upon startup. This is particularly important for the twin-turbo engine, which generates immense heat even at cruising speeds.
Vehicle Background: The Legacy of the BMW 7 Series
The 2018 BMW 750i represents the pinnacle of BMW’s engineering philosophy, specifically the F01 generation of the 7 Series sedan. As the flagship of the brand, the 750i is not merely a luxury vehicle but a technological showcase designed for the discerning driver who demands both opulence and athletic capability. The model is powered by the N63B44B 4.4-liter V8 engine, a masterpiece of modern internal combustion engineering featuring twin turbochargers and Valvetronic variable valve timing. This engine produces substantial power, delivering a driving experience that balances the relaxed cruising expected of a luxury sedan with the aggressive acceleration associated with high-performance sports cars.
Owners of the 2018 750i typically appreciate the vehicle’s “executive” status, characterized by a cabin that isolates passengers from road noise while offering a ride quality that feels floaty yet composed. The interior is a sanctuary of premium materials, advanced infotainment systems, and comfort features that set the benchmark for the industry. The 750i is designed for long-distance travel, making it an ideal choice for those who value the combination of a smooth, powerful ride and a spacious, quiet interior. The platform, developed on the CLAR architecture in its later iterations, ensures a perfect balance of weight distribution and rigidity, contributing to the car’s renowned handling dynamics.
However, the sophisticated nature of the 750i’s engineering, particularly the N63 twin-turbo V8, means that it requires precise maintenance. The high performance of the engine pushes lubricants to their limits, making the use of premium synthetic fluids a necessity rather than a luxury. Owners should be aware of potential issues common to this generation of BMWs, specifically regarding the engine’s cooling system and turbocharger health. The N63 engine is known to be sensitive to oil consumption and potential timing chain wear if not maintained with high-quality synthetic oils that protect against high-temperature sludge and deposits.
Using AMSOIL 0W-30 MS 100% Synthetic European Motor Oil can help mitigate these specific concerns. The specialized formula is designed to prevent carbon buildup on turbocharger bearings and intake valves, a common issue in direct injection and turbocharged engines. The oil’s superior film strength protects critical engine components during the high-RPM operations typical of spirited driving. Furthermore, the extended service intervals possible with synthetic oils reduce the frequency of oil changes, allowing the engine to maintain peak cleanliness over the long haul. By investing in the correct lubricants, owners can enjoy the full potential of this magnificent machine while safeguarding against the high costs associated with turbocharger repairs or engine overhaul.
Another common area of concern for the 2018 750i is the cooling system. The complex cooling requirements of the twin-turbo engine mean that coolant degradation can lead to overheating or corrosion within the aluminum blocks and heads. Using a high-quality coolant like the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant ensures that the cooling system remains free of rust and scale, which can restrict coolant flow and lead to engine damage. Additionally, the 8-speed automatic transmission, while smooth, benefits from the enhanced friction modifiers found in synthetic transmission fluids, such as AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid, which can help prevent shudder and ensure smooth shifts as the vehicle ages.
In conclusion, the 2018 BMW 750i is a vehicle that rewards owners who treat it with the care it deserves. The combination of luxurious appointments and blistering performance is a rare one, and maintaining this balance requires attention to detail. By utilizing AMSOIL’s comprehensive line of synthetic lubricants, owners can ensure that their vehicle receives the protection it needs to perform at its best, year after year. Whether driving in the city or on the open highway, the right fluids provide the confidence to push the boundaries of this exceptional machine.