Ensuring your 2021 Chrysler 300 receives the correct lubrication is essential for maintaining the longevity and performance of its powerful 5.7-liter V8 engine. This vehicle features advanced engine technology and a sophisticated 8-speed automatic transmission that rely on high-quality synthetic fluids to operate efficiently under varying driving conditions. Proper lubrication minimizes wear, manages heat effectively, and extends the service intervals between maintenance cycles, allowing you to drive with confidence whether you are navigating city traffic or tackling long highway commutes.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil – Our top-tier choice offering unsurpassed engine protection for up to 25,000 miles or one year, ideal for the 5.7L engine’s demands.
- AMSOIL Extended-Life 5W-20 100% Synthetic Motor Oil – Provides extended protection for up to 20,000 miles, balancing cleaning power with durability for high-performance driving.
- AMSOIL OE 5W-20 100% Synthetic Motor Oil – A reliable option that outperforms conventional oils and OEM specifications, designed to fight sludge and deposits effectively.
- AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil – Formulated specifically for engines with over 75,000 miles, featuring enhanced anti-wear additives to reduce sludge and improve performance.
- AMSOIL Oil Filter – Engineered with a synthetic media blend to provide 99% filtration efficiency at 20 microns, helping to reduce engine wear and extend oil life.
- WIX Oil Filter – A premium alternative featuring advanced media that offers improvements over standard OEM filters for robust contaminant capture.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Designed for the 8HP70 transmission, this fluid withstands heavy towing and high temperatures while remaining fluid in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A cost-effective synthetic solution that protects against wear and ensures smooth, shudder-free shifts.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Ideal for the front differential, providing advanced wear protection and thermal stability for GL-5 limited-slip applications.
- AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube – Specifically suited for rear axles like the 195, 220, and 230 models, ensuring long oil and seal life while reducing operating temperatures.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A pre-mixed formula that exceeds OEM requirements, protecting the cooling system for up to 150,000 miles or 5 years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option offering superior protection against metallic corrosion and erosion for extreme temperature performance.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS and traction-control responsiveness with a stable viscosity across a wide temperature range.
Engine Oil and Filtration Specifications
The 5.7-liter HEMI V8 engine in your 2021 Chrysler 300 is a high-output powerplant that benefits significantly from synthetic motor oil. The recommended viscosity grade for this engine is 5W-20. When performing an oil change, including the filter, the total capacity is 7.0 quarts. It is crucial to observe the correct torque specifications during the service; the oil drain plug should be tightened to 20 foot-pounds to ensure a proper seal without risking damage to the aluminum pan. AMSOIL Signature Series 5W-20 synthetic motor oil is engineered to meet or exceed the rigorous OEM specifications for this engine, offering superior protection against horsepower loss and wear compared to conventional oils. For those needing extended protection, AMSOIL Extended-Life 5W-20 provides up to 20,000 miles of guaranteed protection. OEM-matched performance is available with AMSOIL OE 5W-20, while AMSOIL 5W-20 High-Mileage is specifically designed for vehicles with over 75,000 miles.
Filtration is the other half of the engine protection equation. The AMSOIL Oil Filter is designed to maximize the capabilities of the synthetic oil by capturing microscopic contaminants that can cause engine wear. It provides 99% filtration efficiency at 20 microns, which is critical for maintaining the longevity of the engine’s internal components. For those who prefer a high-quality aftermarket option, the WIX Oil Filter also serves as an excellent choice, offering superior media and construction compared to standard factory filters.
Transmission and Differential Fluids
The automatic transmission in the 2021 Chrysler 300, specifically the 8HP70 model, is a complex system that operates under high pressure and temperature. To maintain its smooth operation and prevent sludge buildup, we recommend AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid. This fluid is formulated to withstand the rigors of heavy towing and elevated temperatures while maintaining fluidity in sub-zero conditions. A total fill of 9 quarts is required for this transmission system. Alternatively, the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid offers a robust synthetic solution that resists harmful sludge and promotes smooth shifts without the premium price tag.
For the differential and transfer case, the vehicle utilizes specific gear lubricants depending on the axle configuration. For the front differential, which typically requires a GL-5 compatible oil, the AMSOIL SEVERE GEAR® 75W-90 is highly recommended. It contains friction modifiers suitable for limited-slip applications and helps control thermal runaway. The rear differential may require AMSOIL SEVERE GEAR® 75W-85 for certain axle models like the 195, 220, or 230. This fluid provides long oil and seal life while helping to reduce operating temperatures and protect against rust and corrosion.
Antifreeze, Coolant, and Brake Fluid
Maintaining the cooling system is vital for the 5.7L engine’s longevity. The 2021 Chrysler 300 requires a significant volume of AMSOIL Passenger Car & Light Truck Antifreeze & Coolant; depending on the configuration, the system holds approximately 14.7 to 15.1 quarts. This 50/50 pre-mixed ethylene glycol formulation protects all cooling system metals, gaskets, and hoses. It is phosphate-free and compatible with other coolant colors. For those who prefer a concentrate, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant offers a unique formulation that can last up to 150,000 miles or 5 years, significantly surpassing standard metallic corrosion and erosion standards.
Brake safety is paramount. The 2021 Chrysler 300 is designed to work with DOT 3 brake fluid. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid offers a distinct advantage over conventional fluid by providing excellent ABS and traction-control responsiveness. Its stable viscosity over a wide temperature range ensures consistent brake pedal feel and performance in both freezing winter conditions and hot summer stop-and-go traffic.
About the Vehicle
The 2021 Chrysler 300 represents the continued evolution of a vehicle that has long been a favorite in the full-size sedan segment. Rooted in the heritage of the LH platform, the modern 300 offers a distinct blend of Italian-inspired styling and American muscle, making it a standout choice for drivers who appreciate a traditional sedan layout with a powerful personality. The vehicle is built on the global CK platform, sharing its foundation with the Dodge Charger and the Jeep Grand Cherokee, which contributes to its robust build quality and capable handling characteristics.
When equipped with the 5.7-liter HEMI V8 engine, as discussed in this guide, the 2021 Chrysler 300 delivers a significant amount of power and torque. This engine, part of Chrysler’s renowned HEMI family, is celebrated for its efficiency improvements in later model years while maintaining the deep, resonant exhaust note that enthusiasts expect. The combination of the V8 powertrain and the 8-speed automatic transmission provides smooth acceleration and responsive gear shifts, making the car equally competent on the highway or navigating urban environments. The interior typically features high-quality materials and ample space, reinforcing its status as a premium, luxury-oriented sedan.
While the 2021 model is generally reliable, like any modern vehicle with complex systems, owners may encounter specific issues over time. One common area of concern for the HEMI engine is carbon buildup, particularly in the intake valves, which can affect performance and fuel economy. Using a high-quality synthetic oil like AMSOIL Signature Series can help mitigate deposit formation, and adding a AMSOIL P.i. Performance Improver periodically can assist in keeping the fuel injectors clean. Another potential issue involves the suspension components, where bushings and struts may wear out due to road impact or age; using synthetic lubricants during maintenance can help prolong the life of these components and smooth out operation. Additionally, the electronic systems in the 300, while advanced, can sometimes suffer from sensor drift or electrical gremlins, which can be exacerbated by poor fluid conditions in related systems like cooling or transmission. Finally, owners of higher-mileage 300s may experience oil consumption or seal leaks; the AMSOIL 5W-20 High-Mileage formulation is specifically designed to address these aging engine issues by boosting detergents and enhancing anti-wear additives to maintain optimal engine health.
Whether you are a daily commuter or a weekend enthusiast, ensuring your 2021 Chrysler 300 is serviced with the correct AMSOIL fluids will help maximize its performance potential. The vehicle’s reputation for providing a comfortable, powerful ride is well-earned, but it requires the right maintenance regimen to keep it running smoothly for years to come. By adhering to the recommended service intervals and utilizing premium synthetic lubricants, you can enjoy the full capabilities of this impressive American sedan without the worry of premature wear or costly repairs.