The 2009 BMW 550i is a sophisticated grand tourer that demands precise maintenance to maintain its legendary performance and reliability. Powered by the robust 4.8L V8 engine (code N62 B48 D), this vehicle requires fluids that can withstand high thermal loads and the specific metallurgical needs of German engineering. Using the correct lubricants is not just about following a maintenance schedule; it is about ensuring that the intricate components of the engine, transmission, and braking systems operate with maximum efficiency and longevity. From the high-shear environment of the eight-cylinder powerplant to the sensitive automatic transmission, every fluid choice plays a critical role in the vehicle’s overall health. This guide details the exact specifications and AMSOIL products designed to meet or exceed the rigorous demands of this specific BMW model.
Recommended AMSOIL Products
- AMSOIL 0W-30 MS 100% Synthetic European Motor Oil – Engineered specifically for the unique demands of gasoline, diesel, and hybrid European vehicles, this oil features a precise blend of synthetic base oils and premium additives to protect the 4.8L V8 across all temperatures.
- MANN-FILTERS Oil Filter – This premium filtration unit offers superior media improvements over original equipment manufacturer-branded filters, ensuring clean oil circulation to protect the N62 B48 D engine internals.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – An ethylene glycol 50/50 pre-mix formulation designed to protect all cooling system metals, gaskets, and hoses for up to 150,000 miles or 5 years, exceeding OEM requirements.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated formulation that requires mixing with distilled water, offering extended protection up to 150,000 miles or 5 years in passenger cars while greatly surpassing standards for metallic corrosion.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Designed for the GA6HP26Z transmission, this fluid withstands heavy towing, elevated temperatures, and challenging terrain while remaining fluid in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A cost-effective option that provides essential protection against wear for the automatic transmission, ensuring smooth shifting and long component life.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – An excellent choice for maintaining optimal brake performance, featuring stable viscosity over a wide temperature range and providing superior ABS and traction-control responsiveness.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Formulated to reduce friction and help seals remain soft to prevent leaks, this fluid offers strong anti-wear protection and excellent performance in both high and low temperatures.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – A versatile fluid that withstands the rigors of heavy use, providing reserve protection during abuse and remaining fluid in extreme cold conditions.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Protects against wear and harmful sludge while promoting smooth, shudder-free shifts and guarding against leaks for enhanced transmission durability.
- AMSOIL Gasoline Stabilizer – Ideal for vehicles that may see seasonal use, this additive keeps fuel fresh for up to 12 months and protects against varnish, gum buildup, and ethanol corrosion.
- AMSOIL Engine Fogging Oil – A highly-effective rust preventive designed to protect internal engine components during storage or long periods of inactivity, ensuring the engine is ready to start when needed.
- AMSOIL P.i. Performance Improver Gasoline Additive – Restores fuel injectors to 100% flow rate, improves fuel economy, and helps prevent carbon buildup and pre-ignition knock, maximizing the performance of the V8 engine.
- AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor – Lubricates the fuel system and upper cylinders to reduce wear and protect against corrosion in direct injection engines.
- AMSOIL Synthetic Multi-Purpose Grease – Offers long-term performance with outstanding low-temperature pumpability and shear stability to prevent grease squeeze-out from chassis points.
- AMSOIL Heavy-Duty Metal Protector – Provides a long-lasting protective coating against salt, moisture, and chemical corrosion for various metal surfaces on the vehicle.
- AMSOIL MP Metal Protector – Cuts through rust, frees frozen components, and displaces water to stop squeaks and lubricate moving parts.
- AMSOIL Silicone Spray – Protects with a dry lubricating film ideal for surfaces that may be damaged by conventional lubricants, helping prevent the cracking and drying of rubber components.
- AMSOIL Heavy-Duty Degreaser – Quickly dissolves oil, tar, and grime from engine surfaces and other hard-to-clean areas without damaging surrounding components.
- AMSOIL Power Foam® Carburetor and Induction-System Cleaner – Cleans deposits from ethanol and degraded fuel, restoring startability and maximizing horsepower by clearing the induction system.
- AMSOIL Miracle Wash Waterless Wash and Wax Spray – Repels dust and dirt while leaving a protective finish and UV protection, ideal for maintaining the exterior shine with minimal effort.
- AMSOIL Brake and Parts Cleaner – Quickly removes oil, grease, and brake fluid from parts without leaving residue, helping eliminate brake squeal and chatter during maintenance.
- AMSOIL Mudslinger® Mud and Dirt Repellent – Provides a protective, non-stick layer of armor against the accumulation of mud, dirt, and snow, keeping the vehicle looking pristine.
- AMSOIL Engine Degreaser – A professional-strength formula that removes the toughest grease and grime from engine surfaces with just a spray and wash.
- AMSOIL Glass Cleaner – Effectively cuts through grease and grime with a foaming action that doesn’t run, leaving streak-free clarity.
- AMSOIL High-Foam Car Shampoo – A high-foam formula that is hard on dirt but gentle on coatings, breaking down contaminants and road grime effectively.
- AMSOIL Exterior Ceramic Spray – Sheds water rapidly and protects against UV rays with no cure time required, adding a layer of ceramic protection to the paint.
- AMSOIL Interior Detailer – Light Lemon – A multi-surface cleaner that offers 90-day UV protection and traps and eliminates odors for a fresh interior.
- AMSOIL Interior Detailer – Scent Free – A versatile multi-surface cleaner that provides 90-day UV protection and traps odors without adding fragrance.
Engine Oil and Filtration Requirements
The heart of the 2009 BMW 550i is the 4.8L N62 B48 D V8 engine. This naturally aspirated powerhouse relies on high-quality lubrication to manage the heat generated by its eight cylinders. The manufacturer recommends a viscosity of 5W-30 or 0W-30 for all temperatures. The oil capacity for this engine is substantial, requiring 8.5 quarts when performing a complete change that includes the oil filter. It is crucial to check the oil level after refilling to ensure proper lubrication coverage.
Proper oil drain plug torques are also essential for preventing leaks and ensuring a secure seal. The specific torque specifications are M22x1.5 at 45 ft/lbs, M18x1.5 at 26 ft/lbs, or M12x1.5 at 19 ft/lbs, depending on the specific plug hardware. AMSOIL 0W-30 MS 100% Synthetic European Motor Oil is formulated to meet the precise demands of these European engines, featuring a unique blend that protects against wear and extends oil change intervals.
Filtration is equally critical. The MANN-FILTERS Oil Filter used in this application is a premium option that offers improvements over standard OEM filters. By capturing finer particles and maintaining oil flow, it helps keep the engine clean and ensures that the vital lubricating film remains intact between maintenance intervals.
Cooling System Specifications
Maintaining the thermal health of the 4.8L V8 is paramount, especially during periods of heavy use or in extreme weather conditions. The cooling system capacity varies depending on the transmission type. For vehicles with an automatic transmission, the system holds 15 quarts, while manual transmission models require 14.6 quarts. It is vital to use a coolant that is compatible with the aluminum alloys and rubber hoses found in BMW cooling systems.
AMSOIL offers two distinct options for the cooling system. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a ready-to-use 50/50 pre-mix formulation containing ethylene glycol. It is engineered to protect all cooling system metals, gaskets, and hoses for up to 150,000 miles or five years. It is free of phosphates, nitrates, nitrites, silicates, borates, and amines, making it safe for use in all cooling systems.
For those who prefer a concentrated solution, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant provides a robust alternative. This formula requires mixing with distilled water and offers extended protection up to 150,000 miles or five years. It is designed to greatly surpass standards for metallic corrosion and erosion, ensuring the engine stays at the optimal operating temperature even under the most demanding driving conditions.
Transmission and Drive System Lubrication
The 2009 BMW 550i typically utilizes a 6-speed automatic transmission, specifically the GA6HP26Z model. Proper fluid selection here is critical for shift quality and transmission longevity. A total fill for this transmission requires 9.5 quarts, while an initial fill (during a service procedure) is approximately 4.2 quarts. Owners should always carry out an oil level check in accordance with instructions from a diagnostic scan tool to ensure accuracy.
For the highest level of protection, the AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is recommended. It is designed to withstand the rigors of heavy towing, elevated temperatures, and challenging terrain while maintaining fluidity in sub-zero conditions. It provides reserve protection during heavy use and abuse.
Alternatively, the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid offers excellent value while delivering essential protection against wear. This fluid is a cost-effective option that still meets the demanding specifications of the BMW transmission, ensuring smooth shudder-free shifts and guarding against leaks.
Brake Fluids and Hydraulic Systems
Braking performance on a high-performance sedan like the 550i cannot be compromised. The vehicle requires a low viscosity DOT 4 brake fluid. For models equipped with the HBH system, BMW specifically recommends part numbers 81 22 0 142 156 (12 oz.) or 81 22 0 142 155 (1 gallon). If these specific OEM fluids are unavailable, a compatible low viscosity DOT 4 synthetic fluid is an excellent substitute.
The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is formulated to provide excellent ABS and traction-control responsiveness. It maintains a stable viscosity over a wide temperature range, ensuring consistent pedal feel and stopping power regardless of whether the car is sitting in a cold driveway or being driven hard on a track. This fluid is a superior choice for maintaining the hydraulic integrity of the braking system.
Power Steering Fluid
Power steering operation is essential for the driving dynamics of the 550i. The fluid requirements depend on whether the vehicle is equipped with active suspension (AS) or active roll stabilization (ARS). Models with these systems utilize a combined power steering, hydraulic brake booster, and self-leveling suspension reservoir. For standard models without AS/ARS, or those requiring specific fluid types, the AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid is an ideal choice.
This fluid reduces friction and helps seals remain soft to prevent leaks. It offers strong anti-wear protection and excellent high-temperature performance, ensuring quiet operation. For vehicles where the reservoir label suggests a transmission fluid alternative due to the combined systems, the AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid can also be used to meet the specific requirements of the hydraulic components.
Vehicle Background and Performance History
About the Vehicle
The 2009 BMW 550i represents a significant era in the BMW 5 Series lineage, specifically the F10 generation’s predecessor, the E60/E61. This vehicle is widely regarded as one of the most capable and refined sedans of its time. Under the hood lies the N62 engine family, a robust 4.8-liter naturally aspirated V8 that produces substantial power and delivers a smooth, linear power delivery that enthusiasts cherish. The engine code N62 B48 D is distinct for its double-VANOS variable valve timing, which optimizes performance across the entire RPM range.
Owners of the 2009 550i often appreciate its blend of luxury and sportiness. As a flagship sedan of the 5 Series, it offers a spacious interior, high-quality materials, and advanced technology for its year. The vehicle is known for its balanced handling characteristics, providing a comfortable ride without sacrificing the dynamic response expected from a German performance machine. The 8-speed automatic transmission (in later models of this generation) or the 6-speed automatic contributes to its reputation for effortless acceleration and seamless gear changes.
This model year sits in a sweet spot for BMW purists who prefer the sound and feel of a naturally aspirated V8 over the turbocharged engines that would later dominate the lineup. The 550i was designed for grand touring, making it an ideal choice for long-distance travel while maintaining the agility to handle twisty backroads. Its reputation for durability is strong, provided that the maintenance schedule is adhered to with high-quality fluids. The N62 engine, while powerful, benefits significantly from precise lubrication and cooling system maintenance to prevent common aging issues associated with high-mileage vehicles of this era.
Ultimately, the 2009 BMW 550i remains a respected automobile that rewards owners who prioritize proper care. By using the recommended AMSOIL products, owners can ensure that their vehicle continues to perform with the elegance and power it was designed to deliver, preserving its value and driving pleasure for years to come.