Keeping your 2009 Ford Explorer with the 4.0L SOHC V6 running smoothly requires more than just a standard oil change. This engine, known for its durability and smooth power delivery, places specific demands on lubricants, especially as it accumulates mileage. Proper fluid maintenance is critical for preserving the internal components, managing heat, and ensuring the longevity of both the engine and the drivetrain. Choosing the right synthetic motor oil, filters, and fluids can significantly impact performance, fuel efficiency, and the overall lifespan of your vehicle.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – The ultimate choice for engine protection, offering up to 25,000 miles of service and superior resistance to horsepower loss and wear compared to conventional oils.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Provides extended service intervals up to 20,000 miles with 37% more cleaning power to help keep your engine running smoother for longer.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – An OEM-equivalent synthetic oil that fights sludge and deposits while outperforming conventional oils for those seeking standard maintenance protection.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specially formulated for vehicles over 75,000 miles with boosted detergents and seal conditioners to reduce sludge and oil consumption.
- AMSOIL Oil Filter – Designed for extended oil change intervals, this filter captures 99% of contaminants at 20 microns to maximize engine protection.
- WIX XP Oil Filter – Premium media offering improvements over original equipment manufacturer (OEM)-branded filters.
- WIX Oil Filter – A cost-effective filter with premium media.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Engineered to withstand heavy towing and elevated temperatures while maintaining fluidity in sub-zero conditions.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – Ideal for front differentials, offering advanced protection against wear and thermal runaway with friction modifiers for limited-slip applications.
- AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube – A heavy-duty synthetic gear lube suitable for rear standard and limited-slip differentials, providing long oil and seal life.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A pre-mixed, phosphate-free formulation that protects cooling system metals, gaskets, and hoses for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated solution requiring mixing with distilled water for long-term protection.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS and traction-control responsiveness with a stable viscosity that resists boiling in high-heat braking situations.
Engine Oil and Filtration for the 4.0L SOHC
The heart of the 2009 Ford Explorer, the 4.0L SOHC engine, relies heavily on consistent lubrication to operate efficiently. This engine requires a 5W-30 viscosity grade to function correctly across a wide range of temperatures. Using the correct grade ensures optimal flow during cold starts while maintaining the necessary film strength at operating temperatures. The capacity for an oil change with filter replacement is 5.0 quarts. After refilling, it is crucial to check the oil level to ensure the correct amount is in the system. The oil drain plug torque specification is 19 ft/lbs, a detail that prevents leaks or damage to the pan threads during maintenance.
Choosing between the Signature Series and Extended-Life options allows you to tailor the maintenance schedule to your driving habits. The Extended-Life oil provides a guaranteed protection period of 20,000 miles. If your vehicle has accumulated over 75,000 miles, the High-Mileage 5W-30 option includes a unique chemistry designed to condition seals and reduce oil consumption, helping to breathe new life into the engine’s internal components.
Matching the oil with a high-performance filter is equally important. The AMSOIL Oil Filter (EAO11-EA) is engineered to last longer than standard filters, capturing wear-causing contaminants with 99% efficiency at 20 microns. This ensures that the clean oil circulates through the engine as effectively as possible. Alternatively, the WIX XP Oil Filter offers premium media that outperforms many original equipment filters, providing reliable protection for a robust oil change kit. The WIX Oil Filter is another solid option for those seeking a cost-effective solution that still delivers superior filtration performance compared to basic filters.
Transmission and Drivetrain Fluids
The 2009 Ford Explorer is often equipped with a 5-speed automatic transmission (5R55S), which benefits significantly from high-quality synthetic fluid. The total fill capacity for this transmission is approximately 12.4 quarts. Standard transmission fluids can break down over time, leading to shudder, wear, and sluggish shifting. AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid remains fluid in extreme cold and provides a reserve of protection during heavy use, ensuring smooth, shudder-free shifts throughout the life of the fluid.
For owners who prefer a fuel-efficient option that still delivers robust protection, the Signature Series Fuel-Efficient ATF and OE Fuel-Efficient ATF offer excellent alternatives. These fluids are formulated to reduce friction, potentially improving fuel economy while protecting transmission components. When maintaining the drivetrain, the front and rear differentials, as well as the transfer case, require specific attention. The front differential typically requires a specific capacity and viscosity, often 2.7 pints, depending on the configuration. AMSOIL SEVERE GEAR® 80W-90 synthetic gear lubes, provide advanced protection against wear and rust while controlling thermal runaway. For limited-slip differentials or Traction-Lok systems, the SEVERE GEAR® 75W-140 is the recommended choice to ensure proper clutch engagement and prevent noise.
Cooling System and Brake Fluid
The cooling system in the Explorer requires regular attention to prevent overheating, especially given the engine’s age and potential exposure to stop-and-go traffic. The coolant capacity varies depending on the presence of an auxiliary heater; with an auxiliary heater, the capacity is 12.2 quarts, while without it, the capacity is 13.9 quarts. Maintaining the correct antifreeze mixture is essential for corrosion protection. AMSOIL Passenger Car & Light Truck Antifreeze is a 50/50 pre-mixed formulation that is compatible with all other antifreeze colors and free from phosphates, nitrates, and other additives that can damage seals. For those who prefer to mix their own concentrate, the Propylene Glycol Antifreeze offers a concentrated solution that provides protection for up to 150,000 miles or 5 years.
Brake safety should never be compromised. The 2009 Explorer requires a high-performance DOT 3 brake fluid meeting Ford specifications. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid offers a stable viscosity over a wide temperature range, ensuring reliable pedal feel and stopping power. This synthetic fluid resists boiling better than conventional fluids, which is critical for maintaining ABS and traction control responsiveness during hard stops.
Fuel System and Additives
To maximize the efficiency and longevity of your Explorer’s engine, incorporating a fuel additive into your maintenance routine can be beneficial. The AMSOIL P.i.® Performance Improver Gasoline Additive is designed to restore fuel injectors to 100% flow rate, potentially restoring up to 14% horsepower and improving fuel economy. It helps prevent carbon buildup and controls pre-ignition knock, ensuring the engine runs as efficiently as it did when new. For seasonal storage or vehicles that sit for extended periods, the AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, fighting ethanol corrosion and varnish buildup. The WIX Fuel Filters ensure that the fuel reaching the engine is free of contaminants.
About the Vehicle
The 2009 Ford Explorer represents a pivotal era in the history of this iconic SUV, standing as a testament to American automotive engineering. Built on the U1 platform, this model year continues the lineage of the Explorer as a versatile and capable mid-size SUV. The 4.0L V6 engine, code [E] SOHC, was a mainstay for the brand, valued for its smooth power delivery and reliability. This engine was known for its durability, often finding itself in rugged conditions and daily commutes alike.
Ford marketed the Explorer as a crossover utility vehicle that could handle both urban environments and off-road trails. The 2009 model retained the robust design that made previous generations popular, offering a spacious interior with seating for up to seven passengers. The driving character of the Explorer is generally characterized by a comfortable ride quality, absorbing road imperfections well while providing sufficient power for highway merging and towing.
Owners of the 2009 Explorer often appreciate its blend of utility and passenger comfort. The vehicle’s design allows for easy cargo loading and a flexible interior layout, making it a favorite for families and outdoor enthusiasts. While the 4.0L engine is naturally aspirated, it provides a steady stream of torque that suits the vehicle’s weight. The interior design reflects the practical needs of the driver, with intuitive controls and a focus on durability. The Explorer’s reputation for reliability has kept many of these vehicles on the road well beyond their original warranty periods, a testament to the quality of its construction and the strength of its powertrain.
Regular maintenance with the recommended AMSOIL products helps preserve the integrity of the Explorer’s engine and drivetrain. By using high-quality synthetic fluids, owners can extend the service life of their vehicle, ensuring it remains a reliable partner for years to come. Whether navigating city streets or tackling light trails, the 2009 Explorer, when properly maintained, continues to deliver the performance and capability that made it a standout in its class.
Additional Fluids and Care
Beyond the essential fluids, maintaining other aspects of the vehicle can help preserve its value and appearance. Power steering fluid, for instance, can be topped off with the same Multi-Vehicle Synthetic Automatic Transmission Fluid recommended for the transmission, ensuring compatibility and consistent performance. For vehicle care, AMSOIL offers a range of detailing products. The Miracle Wash Waterless Wash and Wax Spray provides a protective finish without the need for water, while the Exterior Ceramic Spray adds a layer of protection against UV rays. Interior detailers are available in Light Lemon and Scent-Free varieties, offering multi-surface cleaning and 90-day UV protection to keep the cabin fresh and protected.
For mechanical maintenance beyond fluids, the AMSOIL Synthetic Multi-Purpose Grease is ideal for chassis lubrication, resisting thermal degradation and providing excellent load-carrying performance. Heavy-duty metal protectors like the AMSOIL Heavy-Duty Metal Protector can be applied to undercarriage components to shield against rust and corrosion from salt and moisture. These protective measures ensure that the 2009 Ford Explorer remains in top condition, ready for whatever road ahead it may face. By combining the right fluids with comprehensive vehicle care, owners can enjoy a driving experience that is both safe and reliable.