Maintaining the 2023 Mercedes-Benz E450 requires precision, especially when it comes to its sophisticated 3.0L 6-cylinder engine with turbocharging. This vehicle is engineered for high performance and demanding driving conditions, where standard lubricants often fall short. Using the correct AMSOIL 5W-30 LS or AMSOIL 5W-40 MS ensures that the engine, transmission, and other critical systems operate at peak efficiency, providing protection against extreme heat, cold, and the heavy load of a modern luxury sedan.
Recommended AMSOIL Products
- AMSOIL 5W-30 LS 100% Synthetic European Motor Oil – Specifically designed for the unique demands of European gasoline and diesel vehicles, this oil features a precise blend of synthetic base oils and premium additives to handle turbocharger stress.
- AMSOIL 5W-40 MS 100% Synthetic European Motor Oil – An alternative European formula that offers a robust synthetic blend ideal for maintaining performance in varying temperatures above -25°C.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mix formulation that protects cooling system metals, gaskets, and hoses while exceeding OEM requirements for long-term corrosion protection.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated coolant that requires mixing, offering superior metallic corrosion and erosion protection for up to 150,000 miles or 5 years.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Engineered to withstand heavy towing and elevated temperatures while remaining fluid in sub-zero conditions to protect the transmission.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A cost-effective OE alternative that provides essential wear protection and fuel efficiency for automatic transmissions.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent responsiveness for ABS and traction control systems while maintaining stable viscosity over a wide temperature range.
Engine Oil Requirements and Capacities
The heart of the 2023 Mercedes-Benz E450 is the 3.0L inline-six engine with the 256.930.2 code. This twin-turbocharged powerplant places significant demands on the lubrication system, requiring oils that can maintain viscosity under high thermal loads and shear forces. AMSOIL recommends two primary options depending on the temperature and driving style. The AMSOIL 5W-30 LS is formulated with a precise blend of synthetic base oils to handle the unique stresses of gasoline, diesel, and hybrid European vehicles. For conditions where temperatures are above -25°C, the AMSOIL 5W-40 MS offers an excellent alternative that maintains film strength.
Proper oil capacity is crucial for this vehicle. The engine holds 9 quarts of oil when the filter is changed. It is vital to refill to the correct level and then check the oil level via the digital dipstick or sensor after the engine has run to ensure optimal lubrication. Unlike standard oils, these European-specific formulations are designed to protect turbocharger bearings and prevent deposit buildup, ensuring the engine’s longevity.
Cooling System Fluids
Keeping the engine at the right temperature is just as critical as the oil itself. The cooling system for the E450 is complex, requiring a coolant that prevents corrosion and cavitation. The source specifications list two distinct capacities for different system types: HTCC14.8 quarts for high-temperature closed cooling and LTCC4.2 quarts for low-temperature closed cooling. For these applications, AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is recommended. This ethylene glycol 50/50 pre-mix is phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free, making it safe for all cooling system metals and hoses. It protects the system for up to 150,000 miles or 5 years.
For those who prefer to mix their own coolant, AMSOIL Propylene Glycol Antifreeze and Engine Coolant is an excellent concentrated option. It is compatible with all other antifreeze colors and offers protection up to 150,000 miles or 5 years. Its unique formulation is designed to greatly surpass standards for metallic corrosion and erosion, providing a reliable barrier against overheating and freezing.
Transmission and Differential Fluids
While the E450 features a robust automatic transmission, fluid choice impacts shifting quality and longevity. The recommended fluids include AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid and AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid. The Signature Series is ideal for severe service, withstanding the rigors of heavy towing and elevated temperatures while remaining fluid in sub-zero weather. The OE Fuel-Efficient version provides robust wear protection and is designed to meet original equipment standards.
Regarding the transfer case, the source indicates a capacity of 1.5 pints. While specific transfer case fluid recommendations were marked as “U/K” (Unknown), proper lubrication is essential for the 10 ft/lbs torque setting on the fill plug and 18 ft/lbs on the drain plug. Ensuring the differential and transfer case are filled with the correct synthetic fluid helps maintain the vehicle’s all-wheel-drive capabilities and smooth power delivery.
Brake Fluid and Maintenance
Brake safety cannot be compromised on a vehicle of this caliber. The 2023 E450 requires a fluid that meets MB Sheet 331.0 standards, specifically DOT 4 plus. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is an ideal choice. It ensures excellent responsiveness for ABS and traction-control systems. By providing stable viscosity over a wide temperature range, this brake fluid prevents the spongy pedal feel that can occur with conventional fluids during spirited driving or in extreme heat.
For additional maintenance, AMSOIL P.i.® Performance Improver Gasoline Additive can help restore up to 14% horsepower and clean GDI fuel injectors. It also helps prevent carbon buildup, a common issue in modern turbocharged engines. During storage, products like AMSOIL Gasoline Stabilizer keep fuel fresh for up to 12 months, while AMSOIL Engine Fogging Oil protects internal components from rust during periods of inactivity.
About the Vehicle: 2023 Mercedes-Benz E450
The 2023 Mercedes-Benz E450 represents the pinnacle of the German luxury sedan segment, blending everyday usability with high-performance engineering. As part of the W213 generation, the E-Class has long been a benchmark for comfort, technology, and safety. The E450 trim specifically targets drivers who want more power than the base model but prefer the efficiency of a mid-size luxury sedan over a heavier S-Class. Under the hood, the 3.0-liter inline-six engine equipped with a twin-scroll turbocharger and 48-volt EQ Boost mild-hybrid system delivers a smooth and powerful driving experience. This configuration typically produces around 362 horsepower, offering brisk acceleration and confident overtaking capabilities.
The E450 is known for its sophisticated air suspension options and advanced driver assistance systems, making it a favorite for both daily commuters and long-distance travelers. Its interior is crafted with high-quality materials, featuring intuitive MBUX infotainment and ergonomic seating that reduces fatigue on extended trips. The vehicle’s reputation for durability is well-earned, but it relies heavily on the quality of fluids used during maintenance. Because of its turbocharged nature and complex electronics, the E450 demands synthetic lubricants that can withstand extreme conditions without degrading. Using premium AMSOIL oils and fluids ensures that this sophisticated machine continues to perform as the engineers intended, delivering a smooth ride and reliable power output for years to come.
Seasonal and Storage Protection
For owners who store their E450 during winter months or use it for seasonal touring, preparation is key. The AMSOIL Gasoline Stabilizer is essential for preventing fuel degradation and varnish buildup, ensuring the engine starts easily and runs smoothly after long periods of inactivity. Additionally, AMSOIL Engine Fogging Oil provides a protective coating inside the cylinders, preventing rust and corrosion on internal parts. These small steps can prevent major issues and keep the vehicle in pristine condition regardless of the season.
Maintaining your 2023 Mercedes-Benz E450 with the correct AMSOIL fluids is an investment in its performance and longevity. By selecting the right oils, coolants, and additives, you ensure that your vehicle handles the rigors of modern driving with ease. Whether you are navigating city traffic or cruising on the open highway, these specialized lubricants provide the necessary protection to keep your E450 running smoothly for the long haul.