The 2008 Ford Explorer equipped with the 4.0L SOHC V6 is a vehicle that has seen a long history of reliable service on roads across the country. To keep this iconic SUV running smoothly, maintaining the proper fluid levels and using high-quality lubricants is essential for preserving engine life and transmission health. As the vehicle accumulates miles, the engine requires fluids that can handle high temperatures, frequent stops, and the mechanical stress of a heavier chassis.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Offers unsurpassed engine protection and extends oil change intervals up to 25,000 miles or one year, providing superior performance against horsepower loss and wear.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Delivers extended protection up to 20,000 miles with enhanced cleaning power to keep the engine running smoother for longer periods.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A high-performance option that outperforms conventional oils, featuring a formulation designed to fight sludge and deposits effectively.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically formulated for vehicles with over 75,000 miles to boost detergent performance and reduce sludge buildup.
- AMSOIL Oil Filter – Designed for extended service life with 99% filtration efficiency at 20 microns to help reduce engine wear.
- WIX XP Oil Filter – A premium media filter that offers improvements over original equipment manufacturer-branded filters for robust contaminant control.
- WIX Oil Filter – A reliable filter choice that provides superior filtration performance to protect the 4.0L engine components.
- WIX Air Filter – Ensures the engine receives clean air, preventing dust and debris from entering the combustion chamber.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique poly-organic acid formulation that protects against corrosion and extends cooling system life up to 150,000 miles or five years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated coolant option requiring mixing with water, offering protection up to 150,000 miles and exceeding OEM standards for metallic corrosion protection.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands the rigors of heavy towing and elevated temperatures while remaining fluid in sub-zero conditions.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – A versatile fluid designed to provide reserve protection during heavy use and maintain performance in challenging terrain.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Promotes smooth, shudder-free shifts and guards against leaks while protecting against wear.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Provides fuel efficiency benefits while protecting against wear in automatic transmissions.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – Offers advanced protection against wear and helps reduce operating temperatures in front differentials requiring GL-5 viscosity.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Controls thermal runaway and protects against rust and corrosion, ideal for limited-slip applications.
- AMSOIL SEVERE GEAR® 75W-110 100% Synthetic Gear Lube – Provides long oil, seal, and equipment life with friction modifiers for demanding differential applications.
- AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube – Engineered for rear differentials, this heavy-duty lube helps reduce operating temperatures and extends equipment life.
- 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.
Proper fluid maintenance is critical for this specific vehicle, particularly given the age and design of the 4.0L SOHC engine. The engine requires a specific amount of oil to ensure all components, from the camshafts to the pistons, remain properly lubricated. The specified capacity for the 4.0L 6-cylinder engine is 5.0 quarts, including the oil filter. Ensuring the correct torque of 18 ft/lbs on the drain plug and verifying the oil level after the refill is essential for preventing leaks and ensuring accurate readings. The synthetic nature of AMSOIL fluids allows for superior heat resistance, which is beneficial for an engine that may be subject to heavy use or hot weather conditions.
Transmission and Differential Fluids
The transmission fluid plays a pivotal role in the longevity of the drivetrain. For the 2008 Ford Explorer, the type of transmission installed dictates the specific fluid required. The vehicle may be equipped with a 6-speed 6R60 transmission or a 5-speed 5R55S transmission. For the 6-speed model, a total fill requires 11.1 quarts, while an initial fill calls for 5 quarts. The 5-speed model requires a total fill of 12.4 quarts. Using a synthetic automatic transmission fluid that resists thermal breakdown is vital for preventing shudder and maintaining smooth shifts, especially if the vehicle is used for towing or driving in stop-and-go traffic. For these applications, consider the AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid or the AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid for versatile protection.
Differential and transfer case lubrication also cannot be overlooked. The front differential typically requires a GL-5 rated lubricant, with a capacity of 2.7 pints for the 80W-90 viscosity. For the rear differential, the requirements vary based on whether the vehicle has a standard or limited-slip differential (Traction-Lok). Both standard and Traction-Lok rear differentials generally require 3.6 pints of a 75W-140 lubricant. The transfer case, when applicable, holds 3 pints of fluid. AMSOIL SEVERE GEAR® synthetic gear lubes provide the necessary extreme pressure protection and thermal stability to handle the heavy loads these axles support, reducing the risk of wear and overheating.
Cooling System and Brake Fluid
Maintaining the cooling system is crucial to prevent overheating, which can lead to catastrophic engine failure. The AMSOIL Propylene Glycol Antifreeze and Engine Coolant capacity varies depending on whether the vehicle is equipped with an auxiliary heater. With an AUX heater, the system holds 13.9 quarts, whereas without it, the capacity is 12.2 quarts. AMSOIL antifreeze and coolants are phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free, making them safe for all cooling system metals, gaskets, and hoses. These formulations are designed to last up to 150,000 miles or five years, offering significant value and protection compared to traditional coolant replacement schedules.
Brake safety is equally important. The 2008 Explorer requires a DOT 3 brake fluid that meets Ford specifications, such as Motorcraft P/N PM-1-C or equivalent meeting WSS-M6C65-A1. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid provides superior fluid stability, ensuring consistent pedal feel and responsiveness even under heavy braking or in extreme temperatures. This stability is critical for ABS and traction control systems, contributing to overall vehicle safety.
Additional Maintenance Products
For seasonal storage or to maintain peak performance, AMSOIL offers a variety of additives and cleaning products. The P.i.® Performance Improver gasoline additive can restore up to 14% horsepower and clean fuel injectors, including GDI types, after a single tank of treated fuel. This is particularly useful for older engines that may have accumulated carbon deposits. Additionally, for those storing the vehicle, the AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, while the AMSOIL Engine Fogging Oil protects internal components from rust during extended periods of inactivity. The AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor further aids in lubricating the fuel system and upper cylinders, compatible with capless fuel systems.
By adhering to the recommended fluid capacities and switching to high-performance synthetic lubricants, owners can ensure their 2008 Ford Explorer continues to perform reliably. The comprehensive range of AMSOIL products covers every aspect of the vehicle’s lubrication needs, from the engine crankcase to the wheel hubs, providing a complete solution for maintenance and protection.
About the Vehicle
The 2008 Ford Explorer is a testament to the enduring appeal of the mid-size SUV segment in the American market. Built on the U1 platform, this generation of the Explorer was known for its rugged build and versatile capability. It was designed to bridge the gap between a comfortable daily driver and a capable off-road companion. The 4.0L SOHC V6 engine, identified by engine code [E], has been a staple in Ford’s lineup for many years, prized for its simplicity and durability. While it may not offer the highest horsepower figures in the class compared to later V8 variants, it provides adequate power for hauling passengers and light to moderate towing duties.
This model year represents the tail end of the previous generation design, characterized by its distinct retro styling cues that were popular in the early 2000s. Owners often appreciate the vehicle for its spacious interior, which accommodates up to seven passengers depending on the trim, making it a practical choice for families. The independent front suspension contributes to a smoother ride quality on paved roads, while the available part-time four-wheel-drive system allows for confident driving in light snow or on unpaved trails. The Explorer has maintained a strong reputation for longevity, with many examples still on the road well beyond their original service life thanks to diligent maintenance.
As a vehicle that originated in the United States, the Explorer plays a significant role in the American automotive landscape, often serving as a family hauler or a utility vehicle for outdoor enthusiasts. Its market position is firmly established as a reliable, no-nonsense SUV that prioritizes utility over sportiness. The 4.0L engine is generally regarded as robust, though it does require attentive maintenance to ensure optimal performance as it ages. Regular fluid changes, particularly of the transmission and differential, are key to preserving the mechanical integrity of this beloved SUV. Whether used for commuting or weekend adventures, the 2008 Ford Explorer remains a capable and respected vehicle on the road.