The 2008 Toyota 4-RUNNER equipped with the 4.7L V8 engine is a robust vehicle known for its capability and durability. However, maintaining this powerful engine requires precise lubrication to ensure longevity and optimal performance. The 2UZ-FE engine relies on specific fluid viscosities and filtration standards to handle both daily commuting and demanding off-road conditions. Using the correct oils and filters helps manage heat, reduce wear, and extend service intervals significantly beyond conventional standards.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Provides unsurpassed engine protection for up to 25,000 miles or one year, offering 75% more protection against horsepower loss and wear.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Delivers extended protection for up to 20,000 miles with 37% more cleaning power to keep the engine running smoother.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A fuel-efficient option that outperforms conventional oils while fighting sludge and deposits.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically formulated for engines with over 75,000 miles to reduce sludge and boost cleaning power.
- AMSOIL Oil Filter – Offers 99% filtering efficiency at 20 microns, helping to reduce engine wear and extending service life.
- WIX Oil Filter – A premium media filter that offers improvements over original equipment manufacturer branded filters.
Proper maintenance begins with selecting the right oil for the specific driving habits of the owner. For the 2008 Toyota 4-RUNNER 4.7L, the engine capacity is 6.6 quarts when changing the oil filter. The oil drain plug should be torqued to 29 ft/lbs. When performing a complete fluid service, it is crucial to check the oil level after refilling to ensure the correct volume is present in the crankcase.
The cooling system of this vehicle requires a robust antifreeze solution to prevent overheating, especially during towing or off-road excursions. The total AMSOIL Passenger Car & Light Truck Antifreeze & Coolant capacity for the radiator and system is 13 quarts. Owners have the option of using a pre-mixed formulation or a concentrate that allows for customization. Both options provide protection up to 150,000 miles or 5 years, depending on the product selected. This extended interval helps minimize maintenance downtime while ensuring the engine stays at an optimal operating temperature.
Transmission and Drivetrain Care
The 2008 Toyota 4-RUNNER features an automatic transmission (A750E or A750F) that requires specific fluid properties to handle the torque of the V8 engine. The initial fill capacity is 3.2 quarts, while a total fill for the 5-speed transmission requires 11.5 quarts. Standard transmission fluid can degrade over time, leading to sludge buildup and rough shifts. Using a synthetic automatic transmission fluid provides superior resistance to thermal breakdown and shear stability.
For those seeking maximum protection, the AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid withstands the rigors of heavy towing and elevated temperatures. Alternatively, the OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid offers a high-performance solution that resists harmful sludge and promotes smooth, shudder-free shifts. Both products protect against wear and remain fluid in sub-zero temperatures, ensuring reliable operation in all climates.
The drivetrain includes a transfer case and differential systems that also benefit from synthetic gear lubricants. The transfer case requires approximately 3 pints of fluid, while the front differential holds 3 pints and the rear differential requires 6.3 pints. For limited-slip differentials and front and rear gear sets, AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube products are ideal. The SEVERE GEAR® 75W-85 100% Synthetic Gear Lube is recommended for both front and rear differentials, while the 75W-90, 75W-110, or 80W-90 options can be used for the transfer case depending on specific application needs. These synthetic gear lubes contain friction modifiers for limited-slip applications and help reduce operating temperatures.
Essential Fluids for Complete Protection
Brake safety is paramount for any SUV, especially one used for heavier loads or mountainous terrain. The hydraulic AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid system should be serviced with AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid. This fluid provides excellent ABS and traction-control responsiveness and maintains a stable viscosity over a wide temperature range, preventing brake fade during intense use.
Power steering fluid requirements for the 2008 Toyota 4-RUNNER align with DEXRON-III specifications. The AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid or the OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid can be used as a cost-effective and high-performance power steering fluid. These formulations resist sludge, guard against leaks, and ensure smooth operation of the steering system. For vehicles that see seasonal use or long periods of inactivity, AMSOIL AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, protecting against varnish and gum buildup.
Air Filtration and Engine Cleanliness
A clean air supply is critical for the efficiency of the 4.7L engine. The WIX Air Filter utilizes premium media to offer improvements over original equipment manufacturer branded filters, ensuring the engine breathes easily. Additionally, carbon buildup over time can reduce performance and fuel economy. The AMSOIL P.i.® AMSOIL P.i.® Performance Improver Gasoline Additive is designed to restore up to 14% horsepower and clean GDI fuel injectors back to 100% flow rate after a single tank of fuel. This additive helps control pre-ignition knock and reduces the need for higher-octane fuels, making it a valuable addition to the maintenance routine.
Vehicle Background
The 2008 Toyota 4-RUNNER stands as a testament to the brand’s reputation for reliability and off-road capability. Based on the Toyota Tacoma and Tundra platforms, this generation of the 4-RUNNER offered a rugged body-on-frame design that appealed to both recreational enthusiasts and daily commuters. The specific model discussed here is powered by the 4.7L 8-cylinder engine, known as the 2UZ-FE. This V8 engine delivers substantial torque, making the 4-RUNNER a competent hauler and trailer tow vehicle, even by modern standards.
Owners of this vehicle often appreciate its versatility. It bridges the gap between a passenger car’s comfort and a dedicated off-roader’s toughness. The interior space is generous, and the suspension setup provides a stable ride whether navigating paved highways or tackling uneven trails. While the 4.0L V6 was also a popular option, the 4.7L V8 provides a level of power that many drivers prefer for the added weight of the 4-RUNNER, particularly when towing or carrying cargo. The vehicle’s heritage traces back to a lineage of trucks designed for durability, a characteristic that keeps these models on the road in high numbers even years after their initial production. With proper maintenance, this SUV continues to offer a dependable driving experience for a wide range of users.