Proper lubrication is the lifeblood of your 2021 Mercedes-Benz E350, especially with the sophisticated 2.0L 4-cylinder turbocharged engine (Engine Code 264.920). This powerplant operates under high temperatures and pressures, demanding fluids that can withstand extreme conditions while maintaining precise tolerances. Using the wrong viscosity or a conventional mineral oil can lead to premature wear, reduced fuel efficiency, and costly repairs. Whether you face freezing winters, scorching summers, or stop-and-go city traffic, the right AMSOIL 5W-30 LS, AMSOIL 5W-40 MS, or AMSOIL 0W-20 LS synthetic lubricants provide superior protection to ensure your vehicle performs exactly as the manufacturer intended.
Recommended AMSOIL Products
- AMSOIL 5W-30 LS 100% Synthetic European Motor Oil – Specifically engineered for the unique demands of European gasoline, diesel, and hybrid vehicles, offering precise additive blends for maximum engine longevity.
- AMSOIL 5W-40 MS 100% Synthetic European Motor Oil – A versatile option for the E350’s turbo engine, providing robust protection in temperatures above -25°C with a formulation designed for European engineering standards.
- AMSOIL 0W-20 LS 100% Synthetic European Motor Oil – The optimal viscosity for maximizing fuel economy and ensuring rapid flow during cold starts, perfect for the factory-recommended specifications of this engine.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A phosphate- and silicate-free ethylene glycol 50/50 pre-mix that protects all cooling system metals, gaskets, and hoses for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated formula requiring mixing with water, offering exceptional protection against corrosion and erosion for up to 5 years or 150,000 miles.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Designed to withstand heavy towing, elevated temperatures, and challenging terrain while remaining fluid in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Provides reliable protection against wear and sludge, ensuring smooth shifting and extended transmission life.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Offers excellent ABS and traction-control responsiveness with a stable viscosity across a wide temperature range, compatible with MB Sheet 331.0 requirements.
Maintaining your 2021 Mercedes-Benz E350 requires attention to detail, particularly regarding the engine oil capacity. For this 2.0L engine, the system holds 6.3 quarts when performing a standard oil change with a filter replacement at temperatures above -25°C. In colder conditions, the capacity may require up to 7 quarts to ensure full coverage. Regardless of the volume used, it is critical to refill the correct amount and check the oil level immediately afterward to avoid overfilling or underfilling, which can both cause severe engine damage. The oil drain plug should be torqued to 30 ft/lbs, and the drain plug seal must be replaced every time to prevent leaks.
Beyond the engine, the cooling system is vital for the longevity of the turbocharged engine. The system capacity is approximately 11.6 quarts. Choosing between a pre-mixed antifreeze like the Passenger Car & Light Truck Antifreeze & Coolant or a concentrated Propylene Glycol Antifreeze and Engine Coolant depends on your maintenance preferences. Both options are formulated to exceed OEM requirements, protecting against rust, corrosion, and cavitation without the abrasive properties found in traditional coolants. For the transmission, the E350 utilizes a sophisticated automatic gearbox that demands a fluid capable of managing heat and wear. AMSOIL Signature Series and AMSOIL OE transmission fluids are designed to remain stable under the rigors of daily driving, ensuring smooth gear changes and preventing the fluid from breaking down over time.
Brake fluid is another critical safety component often overlooked until maintenance is due. The E350 requires a fluid that meets or exceeds the MB Sheet 331.0 specification. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is an ideal replacement, providing a higher dry and wet boiling point than conventional fluids. This ensures consistent brake performance even after prolonged exposure to moisture or high temperatures, reducing the risk of brake fade and ensuring the anti-lock braking system (ABS) functions correctly.
For those looking to optimize the overall health of their vehicle, additional products like the AMSOIL P.i. Performance Improver Gasoline Additive can play a significant role. Modern direct-injection engines, like the one in the E350, are prone to carbon buildup on intake valves and injectors. Using this fuel additive helps restore fuel injectors to nearly 100% flow rate, improves fuel economy, and can restore up to 14% of horsepower lost to carbon deposits. Regular use keeps the fuel system clean, preventing the lean conditions that can damage turbochargers and other sensitive components. Additionally, AMSOIL Upper Cylinder Lubricant can further assist in lubricating the fuel system and upper cylinders during operation.
About the Vehicle
The 2021 Mercedes-Benz E350 represents the pinnacle of luxury and engineering within the midsize sedan segment. Part of the W213 generation, the E-Class has long been the benchmark against which all other executive sedans are measured. This specific model features the M264 engine, a 2.0-liter turbocharged four-cylinder that has replaced the previous V6 options in many markets. The M264 engine code 264.920 is a marvel of modern internal combustion engineering, utilizing a balance shaft design to minimize vibrations and a variable camshaft timing system to optimize power and efficiency across the rev range.
Owners of the E350 appreciate its balanced driving dynamics. While it offers a smooth, comfortable ride typical of the E-Class, it does not sacrifice agility. The combination of the turbocharged engine and a sophisticated 9-speed automatic transmission allows for effortless acceleration and seamless gear shifts. The interior continues the brand’s legacy of opulence, featuring high-quality materials, advanced infotainment systems, and a host of driver-assistance technologies that make highway driving relaxing and urban commuting manageable.
Despite its engineering excellence, like any complex machine, the E350 is not immune to issues. One common concern among owners of the M264 engine is the potential for carbon buildup on the intake valves. Because this is a direct injection engine, fuel does not wash over the valves, allowing carbon deposits to accumulate over time. This can lead to rough idling, reduced power, and increased fuel consumption. Using a high-quality gasoline additive like AMSOIL P.i. can help mitigate this issue by cleaning the injectors and combustion chamber, preserving the engine’s efficiency.
Another area where synthetic lubricants make a profound difference is in the turbocharger system. Turbochargers operate at extremely high RPMs and temperatures, placing immense stress on the oil. Conventional oils can break down under these conditions, leading to sludge formation and bearing failure. By using a full synthetic motor oil such as the AMSOIL 5W-30 LS or AMSOIL 0W-20 LS, owners ensure that the turbo bearings are lubricated with a fluid that resists thermal breakdown and maintains its viscosity under extreme heat, extending the life of the turbocharger.
Furthermore, the cooling system in the E350 is subjected to significant thermal loads, particularly during summer driving or when towing. Over time, conventional coolants can degrade, leading to corrosion of aluminum components and the failure of hoses and gaskets. Switching to an AMSOIL Passenger Car & Light Truck Antifreeze & Coolant or Propylene Glycol Antifreeze and Engine Coolant with OAT technology provides superior corrosion protection, ensuring that the cooling system remains free of rust and scale, which is crucial for maintaining optimal engine operating temperatures.
Finally, the brake system on the E350 plays a critical role in safety. Over time, brake fluid absorbs moisture from the air, which lowers its boiling point and can lead to corrosion in the brake lines and calipers. Synthetic brake fluids like the AMSOIL DOT 3 and DOT 4 offer a much higher boiling point and superior resistance to moisture absorption compared to standard DOT 4 fluid. This ensures that the braking system remains responsive and reliable, even during repeated hard stops or driving in wet conditions. By addressing these potential weak points with high-performance lubricants, E350 owners can keep their vehicles running smoother, safer, and for longer.
In summary, the 2021 Mercedes-Benz E350 is a vehicle built to last, but its longevity depends on the quality of the fluids used. By choosing AMSOIL synthetic lubricants, you are investing in the health of your car, ensuring that every component from the engine to the brakes operates at its peak efficiency. Whether you are commuting daily or embarking on long road trips, the right fluids provide the peace of mind that comes with knowing your vehicle is properly protected.