Understanding the specific fluid requirements for your 2007 Chrysler 300 is crucial for preventing premature engine wear and transmission failure. This vehicle operates best when equipped with full synthetic lubricants, which provide a protective barrier that conventional oils cannot match. The engine requires 6 quarts of SAE 5W-20 motor oil for a complete change, including the filter. The cooling system holds a substantial 9.9 quarts of coolant, requiring a formulation that prevents corrosion and maintains thermal efficiency. For the automatic transmission, which is a 42RLE unit, the total fill capacity is 8.8 quarts, though an initial fill only requires 4 quarts. Differential lubrication varies by axle size, with specific requirements for front and rear units that demand synthetic gear oils to ensure durability under load. Maintaining these fluid levels and using the correct specifications is the most effective way to preserve the vehicle’s value and performance.
Engine Oil and Filtration
The 2.7-liter engine in the 2007 Chrysler 300, identified by engine code [R] EER T, has a specific oil capacity of 6 quarts when the filter is included. This engine benefits significantly from synthetic motor oils that meet modern performance standards. For owners seeking the highest level of protection, AMSOIL Signature Series 5W-20 is the top recommendation. This oil is engineered to withstand extreme temperatures and offers 75% more engine protection against horsepower loss and wear. It allows for service intervals up to 25,000 miles or one year, whichever comes first, making it a cost-effective solution over the long term. For those who prefer a high-performance option that balances cost with superior cleaning power, the AMSOIL Extended-Life 5W-20 provides 20,000 miles of guaranteed protection and helps keep the engine running smoother for longer. Additionally, the AMSOIL OE 5W-20 is a strong contender that fights sludge and deposits effectively, serving as a high-quality alternative for regular maintenance. If the vehicle has accumulated over 75,000 miles, the AMSOIL 5W-20 High-Mileage Motor Oil is specifically designed to address the needs of older engines, with enhanced additives that reduce sludge by 67% and help seal minor leaks.
Filtration is just as critical as the oil itself. The standard AMSOIL Oil Filter is designed for extended service life, capturing 99% of contaminants at 20 microns. It features a higher capacity for small contaminants that can cause wear, ensuring that the engine oil remains clean and effective for the duration of the oil change interval. For drivers who prefer a well-known aftermarket brand, the WIX Oil Filter is also a premium choice, offering improvements over many OEM-branded filters with high-quality media. Keeping the engine clean is a primary objective for the 2007 300, as the accumulation of deposits can lead to reduced efficiency and potential damage to internal components.
Transmission and Differential Fluids
The 2007 Chrysler 300 utilizes a 4-speed automatic transmission known as the 42RLE. To ensure smooth shifting and longevity, using a dedicated automatic transmission fluid (ATF) is highly recommended. The total fill capacity for this transmission is 8.8 quarts. AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid is formulated to withstand the rigors of heavy towing and elevated operating temperatures, making it ideal for this vehicle. It remains fluid in sub-zero conditions and provides reserve protection during heavy use. Alternatively, the AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid offers excellent cold-weather performance and helps prevent leaks while promoting shudder-free shifts.
Differential lubrication is also a key maintenance item for this vehicle. The front differential (175mm FIA) requires 1.3 pints of 75W-90 synthetic AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube. The rear differentials come in various sizes, including 198mm, 210mm, and 215mm units, which typically require 3 to 3.4 pints of 75W-140 AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube. For these applications, SEVERE GEAR is essential. These synthetic gear lubes provide advanced protection against wear, control thermal runaway, and help reduce operating temperatures. They also contain friction modifiers beneficial for limited-slip differentials, ensuring that the vehicle handles cornering and acceleration with stability and precision.
Cooling and Brake Systems
The cooling system capacity for the 2007 Chrysler 300 is 9.9 quarts. Using a high-quality antifreeze and coolant is vital to prevent overheating and corrosion within the radiator and engine block. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a ready-to-use, 50/50 pre-mix formulation that offers protection for up to 150,000 miles or 5 years. It is free of phosphates, nitrites, and silicates, making it safe for all cooling system metals. For those who prefer a concentrated option, AMSOIL Propylene Glycol Antifreeze is a robust alternative that can be mixed with distilled water for maximum efficiency. It is designed to greatly surpass standards for metallic corrosion and erosion.
Brake performance is critical for safety, and the hydraulic AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid in the 300 should meet DOT 3 specifications. It provides excellent responsiveness for ABS and traction control systems. Its stable viscosity over a wide temperature range ensures that the brake pedal remains firm and responsive, regardless of the driving conditions. This synthetic fluid outperforms conventional DOT 3 and DOT 4 fluids in high-temperature environments, reducing the risk of brake fade and ensuring reliable stopping power.
Additional Maintenance and Care
To maintain optimal performance, consider using AMSOIL P.i.® Performance Improver Gasoline Additive. This additive restores up to 14% horsepower and cleans fuel injectors, which is particularly beneficial for GDI engines prone to carbon buildup. It also helps improve fuel economy and prevents the need for higher-octane fuel. For air filtration, the WIX Air Filter is a recommended upgrade, offering premium media that improves airflow and engine efficiency. In addition, AMSOIL Engine Degreaser can be used to clean the engine bay, removing grease and grime that can trap heat and attract dirt. These supplemental products work in tandem with the primary lubricants to ensure the vehicle operates at its best.
Vehicle Background
The 2007 Chrysler 300 stands as a significant model in the modern automotive landscape, representing Chrysler’s bold return to full-size luxury sedans following the bankruptcy restructuring. Based on the LX platform, which it shares with the Dodge Charger and the Dodge Magnum station wagon, the 300 was designed to compete with premium European rivals like the BMW 5 Series and the Mercedes-Benz E-Class. The vehicle is celebrated for its distinctive, muscular design language, often referred to as “Chrysler Bionic” or inspired by the Dodge Viper, featuring a long hood, short overhangs, and a prominent grille. In 2007, the 2.7-liter engine was a common powertrain option, situated alongside more powerful V-8 choices like the 3.5L, 5.7L HEMI, and the 6.1L SRT.
The 2.7-liter engine, known internally as the EER, was a DOHC V-6 developed to offer a balance of fuel efficiency and adequate power. While it delivers respectable horsepower and smoothness, owners of the 2007 300 with this engine have historically reported a few specific issues that proper lubrication can help mitigate. One notable concern is oil consumption, where the engine may burn more oil than normal as it ages, a condition that can be exacerbated by poor quality oils or extended intervals between changes. Another common problem is the buildup of carbon deposits, particularly in the intake valves and fuel injectors, which can lead to rough idling and reduced fuel economy. The use of high-quality synthetic motor oil and periodic use of fuel system cleaners can help minimize these issues.
Additionally, the cooling system on these vehicles can be prone to leaks, often originating from the plastic radiator end tanks which can become brittle over time. Using a high-performance antifreeze that maintains consistent protection against corrosion and thermal stress is crucial for extending the life of the cooling system. Finally, while the automatic transmission is generally robust, the 42RLE can sometimes exhibit harsh shifting or shudder if the fluid degrades or becomes contaminated. Regular fluid changes with a synthetic ATF are widely recommended by enthusiasts and experts to maintain shift quality and prevent costly transmission failures. The 2007 Chrysler 300 remains a popular choice for those who appreciate its spacious interior, comfortable ride quality, and distinctive American styling, provided it is maintained with the right fluids and attention to detail.