The 2016 BMW 428i is a compact luxury coupe powered by a 2.0-liter turbocharged four-cylinder engine, known as the N20B20A. This engine combines high performance with efficiency, but its precision engineering requires fluids that can meet exacting OEM standards. Regular maintenance with the correct lubricants ensures the turbocharger operates at peak efficiency, reduces wear on internal components, and maintains the vehicle’s fuel economy over the long term. Using the right motor oil, transmission fluid, and cooling system additives is essential to preserving the sophisticated mechanical systems found in this German-engineered vehicle.
Recommended AMSOIL Products
- AMSOIL 0W-20 LS 100% Synthetic European Motor Oil – A specialized synthetic formula designed for the unique demands of gasoline, diesel, and hybrid European vehicles, providing superior protection against high temperatures and turbocharger stress.
- AMSOIL Oil Filter – Offers filtering efficiency of 99 percent at 20 microns, designed to reduce engine wear by capturing small, wear-causing contaminants and allowing lower restriction for better lubrication.
- MANN-FILTERS Oil Filter – A premium alternative to the factory filter that offers improved media performance, ensuring high-quality filtration compatible with the BMW 428i engine requirements.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A phosphate- and silicate-free ethylene glycol formula that protects cooling system metals and hoses, engineered to exceed original equipment manufacturer requirements for up to 150,000 miles.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Provides extended life and protection for the 8-speed automatic transmission (GA8HP45Z), remaining fluid in extreme cold and withstanding the rigors of heavy towing and elevated temperatures.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A cost-effective OE-compliant option that protects the transmission against wear while maintaining fuel efficiency standards.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Features excellent ABS and traction-control responsiveness with stable viscosity over a wide temperature range, serving as a high-quality replacement for the specified BMW brake fluid requirements.
Engine Oil and Filtration Specifications
The heart of your 2016 BMW 428i is the 2.0-liter turbocharged 4-cylinder engine, identified by the engine code N20B20A. This powerplant generates significant power and torque through forced induction, placing unique stresses on the lubrication system. The turbocharger spins at incredibly high speeds, requiring an oil that remains stable under extreme heat to prevent coking and sludge formation. Conversely, cold starts require the oil to flow quickly to reach the bearings and camshafts immediately.
AMSOIL recommends their 0W-20 LS 100% Synthetic European Motor Oil for this application. This specific grade meets the viscosity requirements for both cold-start protection and high-temperature stability. The capacity for a complete oil change, including the filter, is 5.3 quarts. It is crucial to note that after the refill, the oil level must be checked to ensure it falls within the correct operating range. The oil drain plug should be tightened to a torque of 6 ft/lbs. If the new drain plug does not latch properly after tightening to the specified torque, it must be repositioned so that the latch mechanism is aligned before final installation.
Filtration is equally critical for turbocharged engines. The AMSOIL Oil Filter (Part Code EA15K54-EA) is designed to capture wear-causing contaminants more effectively than competing filters due to its greater capacity. It provides a filtering efficiency of 99 percent at 20 microns, ensuring that the oil circulating through the turbocharger and valve train remains clean. For those preferring the original equipment brand, the MANN-FILTERS Oil Filter (Part Code HU816X-EA) is also a recommended alternative, offering premium media that improves upon OEM-branded filters. Both filters are designed to support the extended service intervals possible with AMSOIL synthetic motor oils.
Transmission and Differential Care
The 2016 BMW 428i is equipped with an 8-speed automatic transmission, specifically the GA8HP45Z unit. This transmission is engineered for smooth shifts and high performance, but it operates under significant thermal loads, especially in spirited driving conditions. Maintaining the transmission fluid is vital to prevent sludge buildup and ensure the longevity of the internal clutches and valves.
For this transmission, AMSOIL offers two primary options depending on your service needs. The Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid (Part Code ATLPK-EA) is the premium choice for severe driving conditions. It withstands the rigors of heavy towing, elevated temperatures, and challenging terrain while remaining fluid in sub-zero temperatures. The total fill capacity for the 8-speed GA8HP45Z is 9 quarts. If you require an OE-compliant synthetic fluid, the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid (Part Code OTLQT-EA) is a suitable alternative that protects against wear and maintains fuel efficiency.
While the vehicle does not feature a traditional differential or transfer case in the rear-wheel-drive coupe configuration, it does utilize a clutch hydraulic system for the manual operation of the clutch fluid (HBH). The system recommends BMW P/N 81 22 0 142 156 or 81 22 0 142 155. If these specific BMW fluids are unavailable, a low viscosity DOT 4 brake fluid is an acceptable substitute. This is where AMSOIL’s synthetic brake fluid excels, providing a high-performance alternative that ensures stable viscosity and excellent ABS responsiveness.
Cooling System Fluids
The cooling system on the 2016 BMW 428i plays a critical role in maintaining engine performance and protecting against corrosion. The cooling fluid must be compatible with the various metals and gaskets found in the engine block, radiator, and hoses. AMSOIL provides two distinct options for this purpose.
The first is the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant (Part Code ANTPC1G-EA). This is an ethylene glycol 50/50 pre-mix formulation that is phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free. It is designed to protect all cooling system metals and hoses while allowing for use in a wide variety of vehicles. The capacity varies based on the system configuration, with approximately 7 quarts for MT systems and 9.6 quarts for AT systems.
The second option is the AMSOIL Propylene Glycol Antifreeze and Engine Coolant (Part Code ANT1G-EA). This is a concentrated formulation that requires mixing with distilled or high-quality water. It offers extended protection up to 150,000 miles or 5 years and greatly surpasses standards for metallic corrosion and erosion. It is compatible with all other antifreeze and coolant colors, offering versatility for maintenance needs.
Additional Protection and Maintenance
Beyond the essential fluids, maintaining the fuel system and appearance of your BMW is important for preserving its value and performance. The AMSOIL P.i. Performance Improver Gasoline Additive (Part Code API) helps restore up to 14% horsepower and restores GDI fuel injectors to 100% flow rate. This is particularly beneficial for the direct injection system in the N20 engine to prevent carbon buildup.
For storage or winterizing, the AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, protecting against varnish and gum buildup. The AMSOIL Engine Fogging Oil provides rust prevention for internal components during periods of inactivity. For exterior protection, the AMSOIL Synthetic Multi-Purpose Grease offers long-term performance for chassis points, while the AMSOIL Brake and Parts Cleaner ensures that brake components are free of oil and grease before service.
About the Vehicle: The 2016 BMW 428i
The 2016 BMW 428i represents the third generation of the BMW 4 Series, continuing the brand’s legacy of combining sporty design with luxury practicality. Introduced as a replacement for the 3 Series Coupe, the 4 Series was designed to appeal to drivers who wanted a dedicated two-door experience without sacrificing the comfort and technology expected of a premium German automobile. The 428i trim specifically is powered by the N20 engine, a highly regarded 2.0-liter turbocharged four-cylinder that delivers a strong balance of power and efficiency.
This model is part of the F32 generation, known for its sleek, coupe-inspired silhouette featuring the iconic “angel eyes” headlights and the signature BMW kidney grille. The interior typically features high-quality materials, a driver-focused cockpit, and a range of advanced technologies including iDrive infotainment and available premium sound systems. The 428i is celebrated for its responsive handling, attributed to its well-tuned suspension and rear-wheel-drive layout, making it a favorite among driving enthusiasts who enjoy spirited canyon runs or spirited highway merges.
As a compact luxury coupe, the 428i occupies a unique market position, offering the agility of a sports car with the daily usability of a luxury sedan. Owners often appreciate the vehicle’s reliability when maintained properly, its stylish aesthetic that turns heads, and the refined driving dynamics that define the BMW brand. Whether used for commuting or weekend drives, the 428i requires a maintenance regimen that matches its performance pedigree, ensuring that the turbocharged engine and sophisticated transmission continue to perform with the precision the vehicle was engineered for.
Why Proper Lubrication Matters for Your BMW
Maintaining the correct fluid levels and using high-quality lubricants is not merely a suggestion for the 2016 BMW 428i; it is a necessity for the longevity of its sophisticated engineering. The turbocharged N20 engine operates at higher temperatures than traditional naturally aspirated engines, and the synthetic base oils in AMSOIL products are specifically formulated to resist thermal breakdown. This resistance prevents the formation of sludge and varnish, which can clog oil passages and lead to premature engine wear.
Furthermore, the transmission fluid plays a pivotal role in the smooth operation of the 8-speed gearbox. Using a fluid that does not meet the strict BMW specifications can lead to rough shifts and internal wear. The AMSOIL fluids provide a stable frictional profile that ensures the clutches engage and disengage smoothly, preserving the transmission’s internal components. Similarly, the brake fluid‘s ability to maintain viscosity under pressure ensures that the anti-lock braking system (ABS) and traction control systems function correctly, which is critical for vehicle safety.
By adhering to the recommended fluid specifications and utilizing products like the AMSOIL 0W-20 LS Motor Oil and the associated filters, owners can extend the service intervals between maintenance while providing superior protection. This approach not only reduces long-term ownership costs but also helps maintain the vehicle’s resale value and performance characteristics for years to come.