The 2009 Mitsubishi Eclipse with the 2.4L inline-four engine (Engine Code [F] 4G69 F) is a sports coupe that demands consistent, high-quality lubrication to maintain its performance and longevity. This vehicle operates in various conditions, from daily commuting to spirited driving on winding roads. Proper fluid selection is critical for ensuring the engine components remain protected from wear, sludge, and temperature extremes. Using the correct viscosity and synthetic formulations can extend service intervals and maximize engine life.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil – The top choice for unsurpassed engine protection, offering up to 25,000 miles of service life and exceptional defense against horsepower loss.
- AMSOIL Extended-Life 5W-20 100% Synthetic Motor Oil – An excellent option for extended drain intervals up to 20,000 miles, featuring enhanced cleaning power to keep the engine running smoother for longer.
- AMSOIL OE 5W-20 100% Synthetic Motor Oil – Designed to outperform conventional oils, this formulation effectively fights sludge and deposits while meeting rigorous OEM requirements.
- AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil – Ideal for Eclipse models with over 75,000 miles, this oil features boosted detergents and seal conditioners to reduce leaks and sludge.
- AMSOIL Oil Filter – Provides superior 99 percent filtration efficiency at 20 microns, holding more contaminants than competing filters to ensure maximum engine cleanliness.
- WIX Oil Filter – A premium aftermarket option that offers improvements over original equipment manufacturer-branded filters for reliable oil change maintenance.
- WIX Air Filter – Features premium media that improves airflow and filtration performance over standard OEM filters to support engine efficiency.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing, elevated temperatures, and challenging terrain while remaining fluid in sub-zero conditions.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Promotes smooth, shudder-free shifts and guards against leaks and harmful sludge in automatic transmissions.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Provides excellent ABS and traction-control responsiveness with a stable viscosity range across extreme temperatures.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Formulated to reduce friction, help seals remain soft, and resist heat for long fluid life and quiet operation.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mix ready-to-use fluid offering protection up to 150,000 miles or 5 years, compatible with a wide variety of vehicle metals.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated non-toxic option that requires mixing, delivering superior corrosion protection and extending drain intervals up to 150,000 miles.
Choosing the right viscosity is the first step in protecting your Mitsubishi Eclipse’s engine. For this 2.4L inline-four engine, AMSOIL recommends using SAE 5W-20, particularly when operating temperatures are below 38°C. In warmer conditions, SAE 10W-30 is also specified. The oil capacity for a complete change, including the filter replacement, is approximately 4.5 quarts. After refilling, it is essential to check the oil level to ensure the correct amount is present, as overfilling or underfilling can affect engine performance. The oil drain plug should be torqued to a specification between 26 and 32 ft-lbs to prevent leaks or thread damage.
The AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil offers the highest level of protection for this vehicle, providing up to 25,000 miles of protection or one year, whichever comes first. This oil is tested to offer significantly more protection against horsepower loss and wear compared to industry standards. For those seeking a balance between performance and value, the AMSOIL Extended-Life 5W-20 guarantees protection for up to 20,000 miles while delivering 37 percent more cleaning power to keep the engine running smoothly. Additionally, the AMSOIL OE 5W-20 is a robust 100% synthetic option that fights sludge and deposits effectively, making it a great choice for maintaining the engine’s original performance levels. If your vehicle has accumulated over 75,000 miles, the AMSOIL 5W-20 High-Mileage Motor Oil is formulated with boosted detergent packages and enhanced anti-wear additives to clean out deposits and reduce sludge by 67 percent, helping the engine last longer.
Transmission and Fluid Maintenance
The transmission is a vital component of the Eclipse’s drivetrain, requiring fluid that can handle the stress of spirited driving. For automatic transmissions, including the F4A4B-4 and F5A5A-4 series, AMSOIL offers synthetic solutions that resist wear and sludge buildup. The AMSOIL Signature Series Multi-Vehicle Automatic Transmission Fluid remains fluid even in sub-zero temperatures and provides reserve protection during heavy use. It is designed to withstand the rigors of elevated temperatures, making it an excellent choice for protecting the transmission from heat-related failures.
For drivers looking for a high-performance yet budget-friendly option, the AMSOIL OE Multi-Vehicle Automatic Transmission Fluid is highly effective. It guards against leaks, promotes smooth shifts, and resists the harmful sludge that can accumulate over time. Proper fluid capacity is crucial for maintaining system pressure; initial fills for the 4-speed F4A4B-4 require 3.7 quarts, while a total fill requires 7.7 quarts. For the 5-speed F5A5A-4, the initial fill is 3.7 quarts, with a total fill capacity of 8.3 quarts. Regular fluid changes ensure the transmission operates smoothly and extends the life of internal components.
Essential Safety and Cooling Fluids
Braking performance is non-negotiable for any sports coupe. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is specifically recommended for the hydraulic brake systems found in this vehicle. It provides excellent responsiveness for ABS and traction control systems, ensuring safe stops in all weather conditions. Its stable viscosity across a wide temperature range means consistent pedal feel whether you are driving in freezing winter mornings or hot summer afternoons.
Keeping the cooling system in peak condition is also vital for preventing overheating. The 2009 Mitsubishi Eclipse requires a specific amount of coolant depending on the transmission type. With an automatic transmission, the cooling system holds approximately 9.2 quarts, while manual transmission models require 9.3 quarts. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a phosphate-, nitrate-, and silicate-free 50/50 pre-mix that protects all cooling system metals, gaskets, and hoses for up to 150,000 miles. Alternatively, the AMSOIL Propylene Glycol Antifreeze is a concentrated, non-toxic option that can be mixed with distilled water for custom strength, offering up to 150,000 miles of protection and superior corrosion resistance.
Finally, the power steering system benefits from the AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid. This fluid helps seals remain soft to prevent leaks, resists heat for a long fluid life, and provides excellent anti-wear protection. Formulated for quiet operation, it reduces friction and ensures smooth steering response, enhancing the driving experience of your Eclipse.
About the Vehicle
The 2009 Mitsubishi Eclipse represents a significant chapter in the legacy of the Eclipse line, known for its sleek, aggressive styling and sporty character. This generation of the Eclipse was designed as a 2+2 seater coupe that blended everyday usability with the performance credentials of a sports car. The 2.4L inline-four engine, identified by the 4G69 F code, was a reliable and efficient powerplant that provided a healthy balance of torque and responsiveness for spirited driving. This engine was part of Mitsubishi’s well-regarded engine family, known for durability and adaptability.
Owners of the 2009 Eclipse often appreciate the vehicle’s distinct look, which featured a sharp front fascia and a muscular profile that stood out in the mid-size coupe market of the late 2000s. The interior was designed to be driver-focused, offering a comfortable yet engaging cockpit for those who enjoy the road. While the Eclipse did not compete in the hyper-compact category, it carved a niche for itself as an accessible sports car that didn’t sacrifice practicality entirely. The combination of a well-tuned suspension and the 2.4L engine made it a favorite among enthusiasts who wanted a car that could handle winding roads on the weekend but also serve as a reliable daily driver. The platform and engineering of the Eclipse have earned it a reputation as a fun-to-drive vehicle with a strong community of support and aftermarket potential, making it a beloved choice for car owners who value both style and substance.