Maintaining your 2007 Ford Explorer Sport TRAC with the 4.0L V6 engine requires precise fluid selection to ensure longevity and optimal performance. This robust SUV, equipped with the durable Coyote-era predecessor engine code [K] K, places specific demands on its lubrication systems, particularly regarding heat management, sludge prevention, and component wear. Whether you are navigating rugged off-road trails or commuting daily through stop-and-go traffic, using the correct viscosities and fluid types is essential to avoid costly repairs and extend the vehicle’s operational life.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Engineered to provide superior protection against horsepower loss and wear, this oil can last up to 25,000 miles or one year.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Offers 37% more cleaning power to keep the engine running smoother and provides guaranteed protection for up to 20,000 miles.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A trusted OEM-quality synthetic option that fights sludge and deposits while outperforming conventional oils.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically formulated for vehicles over 75,000 miles with boosted detergents and anti-wear additives to reduce sludge and engine wear.
- AMSOIL Oil Filter – Provides 99% filtering efficiency at 20 microns with greater capacity for contaminants, reducing engine wear and extending service life.
- WIX XP Oil Filter – Features premium media that offers significant improvements over original equipment manufacturer (OEM)-branded filters.
- WIX Oil Filter – A cost-effective premium media filter designed to outperform standard OEM filters in protecting your engine.
- WIX Air Filter – Ensures clean air intake for the 4.0L engine, protecting internal components and maintaining optimal airflow.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique poly-organic acid (OAT) formulation that protects cooling system metals, gaskets, and hoses for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated formula that greatly surpasses corrosion and erosion standards, ideal for long-term protection.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing and elevated temperatures while remaining fluid in sub-zero conditions.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – A versatile, high-performance fluid designed to handle the rigors of challenging terrain and heavy use.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Guards against leaks and promotes smooth, shudder-free shifts for automatic transmissions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Designed to protect against wear while offering fuel-efficient performance for daily driving.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – Provides advanced protection against wear and thermal runaway for front differentials.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Offers exceptional protection for limited-slip applications and helps reduce operating temperatures.
- AMSOIL SEVERE GEAR® 75W-110 100% Synthetic Gear Lube – Ideal for demanding conditions where higher viscosity is required for gear protection.
- AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube – Recommended for rear differentials where synthetic oil is required to handle heavy loads and extreme heat.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS and traction-control responsiveness with stable viscosity over a wide temperature range.
The 2007 Ford Explorer Sport TRAC is a capable vehicle, but its longevity depends heavily on the quality of fluids used. The 4.0L OHV V6 engine, identified by engine code [K] K, is renowned for its reliability but is also susceptible to oil consumption issues and sludge buildup if conventional oils are used for extended periods. By switching to a high-quality synthetic motor oil, you address these common failure points directly. The engine requires a 5.0-quart capacity of 5W-30 viscosity oil when including the filter change. The Signature Series 5W-30 offers a unique formulation that fights wear and horsepower loss, ensuring the engine runs cooler and cleaner. For those with vehicles exceeding 75,000 miles, the High-Mileage 5W-30 provides enhanced seal conditioning and extra detergents to rejuvenate the engine’s internal cleanliness.
The cooling system for this model holds 12.2 quarts of coolant. Using a standard green coolant may lead to corrosion and gasket failure over time due to the age of the vehicle. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant or the concentrated Propylene Glycol formula ensures that the aluminum and metal components within the cooling system are protected against rust and corrosion. These formulations are phosphate, nitrate, and silicate-free, making them safe for all cooling system metals and compatible with various coolant colors, ensuring long-term thermal stability up to 150,000 miles or five years.
Transmission health is another critical area. The Explorer Sport TRAC typically comes with either a 5-speed 5R55S or a 6-speed 6R60 automatic transmission. The 6-speed transmission holds 11.1 quarts for a total fill, while the 5-speed requires 12.4 quarts for a complete change, with an initial fill of 5 quarts. Using a synthetic automatic transmission fluid is vital to prevent shudder, improve shift quality, and protect against the high temperatures generated during towing or off-road driving. The Signature Series Fuel-Efficient or Multi-Vehicle transmission fluids are specifically designed to withstand the rigors of heavy towing and elevated temperatures, ensuring smooth operation even in sub-zero conditions. For a more budget-friendly option that still delivers OE performance, the OE Multi-Vehicle or OE Fuel-Efficient fluids offer excellent protection against wear and sludge.
Differential and transfer case lubrication is often overlooked but is essential for a 4×4 vehicle like the Explorer Sport TRAC. The transfer case requires 3 pints of lubricant and is compatible with Mercon LV specifications. The front differential calls for 2.7 pints of GL-5 rated lubricant, while the rear differential requires 3.6 pints. The rear unit specifically requires synthetic oil. AMSOIL’s SEVERE GEAR line covers these needs with 80W-90, 75W-90, 75W-110, and 75W-140 formulations. These gear lubes contain friction modifiers for limited-slip applications and control thermal runaway, helping to extend the life of seals and gears under extreme load.
Finally, maintaining the braking system and fuel system is crucial for safety and performance. The vehicle requires DOT 3 and DOT 4 brake fluid, for which AMSOIL offers a 100% synthetic alternative that provides superior ABS responsiveness compared to conventional fluids. Additionally, to maximize fuel economy and engine performance, the AMSOIL P.i. Performance Improver gasoline additive can be used to restore fuel injectors and remove carbon buildup, which is particularly beneficial for vehicles that have seen significant use.
Vehicle Background
The 2007 Ford Explorer Sport TRAC represents a unique and often underappreciated chapter in the history of the Ford Explorer lineup. Introduced as a response to the growing popularity of mid-size truck-based SUVs that offered a blend of utility, rugged capability, and the open-air convenience of a pickup bed, the Sport TRAC was a niche vehicle that stood out in a crowded market. Based on the Ford Ranger platform, it shared a significant amount of its mechanical DNA with its pickup truck counterpart, including a shared chassis architecture and independent rear suspension. This foundation gave the Explorer Sport TRAC a distinct driving character; it was generally more agile and car-like in its handling compared to the full-size Ford Expedition or the standard Explorer, yet it retained the ground clearance and off-road prowess associated with a 4×4 vehicle.
Powering the majority of these vehicles was the 4.0L SOHC V6 engine, known for its reliability and ease of maintenance. This engine, identified by the code [K] K in this context, was a workhorse that delivered sufficient torque for towing and hauling, making it a favorite among outdoor enthusiasts and contractors alike. The vehicle’s market position was firmly rooted in the utility segment, offering a four-door cabin with a unique 4.5-foot bed. This configuration allowed owners to carry large items in the back while still having a secure, weather-protected space for passengers and cargo in the rear of the cab. The combination of a spacious interior, a versatile bed, and a robust drivetrain made the Sport TRAC an attractive option for those who needed a daily driver that could double as a weekend adventure machine.
Despite its reputation for durability, the 2007 Explorer Sport TRAC, like many vehicles of its era, faced specific mechanical challenges that owners should be aware of. Proper lubrication plays a pivotal role in mitigating these common issues. One prevalent problem involves the engine’s tendency to consume oil, often due to failing valve stem seals or piston ring sticking, which can lead to low oil levels and increased wear. Using a high-mileage synthetic motor oil with enhanced seal conditioners can help mitigate this by rejuvenating old seals and providing better lubrication to the piston rings, thereby reducing oil consumption and extending engine life.
Another common issue found in these vehicles is sludge buildup within the engine, particularly if the owner has not adhered to strict oil change intervals. The 4.0L engine is sensitive to oil quality, and conventional oils can degrade over time, leading to varnish and sludge that can clog oil galleries and starve critical components. AMSOIL synthetic oils are engineered with superior detergents and dispersants that prevent sludge formation, ensuring that the engine’s internal passages remain clean and that oil flow is unrestricted even in high-temperature conditions.
Transmission shuddering is a third notable concern for drivers of this model, often occurring at lower speeds or during light acceleration. This shudder can be attributed to the fluid degrading over time, losing its friction-modifying properties, or to the torque converter locking up. Switching to a high-quality synthetic transmission fluid, such as the AMSOIL Signature Series Multi-Vehicle ATF, can significantly reduce or eliminate this shudder by providing more consistent friction characteristics and better thermal stability than standard factory fluids.
Finally, the cooling system in older Explorer Sport TRACs can suffer from corrosion and leakage, often starting at the radiator or water pump. The plastic components in these systems can become brittle with age, leading to cracks and coolant loss. Using a high-performance antifreeze and coolant, specifically the AMSOIL OAT-based formulas, can help protect the cooling system metals and rubber hoses from corrosion and degradation, ensuring that the engine stays within safe operating temperatures and preventing costly overheating failures. By addressing these specific vulnerabilities with the recommended fluids, owners can significantly improve the reliability and longevity of their 2007 Ford Explorer Sport TRAC.