Maintaining your 2007 Mitsubishi Endeavor with the 3.8L 6-cylinder (Engine Code [S] 6G75 S) requires precise attention to fluid specifications to ensure longevity and performance. This powerful engine, paired with either front-wheel drive or all-wheel drive configurations, is prone to high operating temperatures and internal wear if standard mineral oils are used for extended periods. Switching to high-quality synthetic lubricants not only meets the manufacturer’s SAE 5W-20 viscosity requirement but also extends service intervals, improves fuel economy, and provides superior protection against the wear and sludge buildup common in higher-mileage vehicles.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-20 100% Synthetic Motor Oil – Offers up to 25,000 miles of protection with 75% more engine protection against horsepower loss and wear, making it the premier choice for this powerful V6.
- AMSOIL Extended-Life 5W-20 100% Synthetic Motor Oil – Provides 20,000 miles of guaranteed protection and features 37% more cleaning power to help keep the engine running smoother and cleaner.
- AMSOIL OE 5W-20 100% Synthetic Motor Oil – A cost-effective 100% synthetic option that fights sludge and deposits while meeting standard OEM mileage requirements.
- AMSOIL 5W-20 100% Synthetic High-Mileage Motor Oil – Specifically formulated for vehicles over 75,000 miles with boosted detergents and additives to reduce sludge and extend engine life.
- AMSOIL Oil Filter – Delivers 99% filtration efficiency at 20 microns with greater capacity for contaminants, ensuring lower restriction and reduced engine wear.
- WIX XP Oil Filter – Features premium media that offers improvements over original equipment manufacturer-branded filters for reliable protection.
- WIX Oil Filter – A reliable OEM-style replacement that utilizes premium media to filter out harmful wear-causing particles.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique OAT formulation providing protection for up to 150,000 miles or 5 years, compatible with all cooling system metals.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option that offers protection for up to 150,000 miles and surpasses corrosion standards for passenger cars and light trucks.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing, elevated temperatures, and remains fluid in sub-zero conditions for smooth shifting.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Resists sludge and guards against leaks while promoting shudder-free shifts for automatic transmissions.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – Advanced protection for differentials and transfer cases, helping reduce operating temperatures and extending seal life.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Controls thermal runaway and protects against rust and corrosion in heavy-duty gear applications.
- AMSOIL SEVERE GEAR® 75W-110 100% Synthetic Gear Lube – Provides extreme protection for heavy loads and harsh operating conditions in limited-slip and conventional differentials.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Ensures excellent ABS and traction-control responsiveness with stable viscosity over a wide temperature range.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Reduces friction and helps seals remain soft to prevent leaks while offering strong anti-wear protection.
- WIX Air Filter – Uses premium media to improve airflow and filtration efficiency over original equipment filters.
- WIX Cabin Air Filters – Protects occupants by trapping dust, pollen, and other airborne contaminants inside the vehicle.
- AMSOIL P.i.® Performance Improver Gasoline Additive – Restores up to 14% horsepower and cleans fuel injectors to 100% flow rate after just one tank of fuel.
Using the correct oil viscosity is critical for the 3.8L 6-cylinder engine in your Endeavor. The engine code [S] 6G75 S requires a specific balance of protection and flow. SAE 5W-20 is the preferred viscosity, especially when temperatures drop, though the engine can operate on 10W-30 in temperatures above -18°C. The total capacity for a standard oil change, including the filter, is 4.5 quarts. Be sure to check the oil level after refilling and adhere to the recommended torque specification of 26-32 ft/lbs for the drain plug to prevent leaks or stripped threads.
Beyond the engine, the transmission fluid plays a vital role in the smooth operation of your Mitsubishi Endeavor. Whether you have the W4A5A-4 or F4A5A-4 automatic transmission, the total fill capacities differ slightly, ranging from 8.9 to 9.3 quarts. Using a high-quality synthetic transmission fluid is essential for preventing the shudder and wear that can develop over time. AMSOIL offers both Signature Series and OE formulations designed to resist sludge and protect against wear in these specific automatic transmissions, ensuring smooth, shudder-free shifts even under heavy loads.
For the cooling system, the fluid capacity varies depending on whether your vehicle is equipped with the Tow Package. An AWD model with the Tow Package holds 10.1 quarts, while the AWD without Tow Package and the FWD models require 9.5 quarts. AMSOIL’s antifreeze and coolant options, including both the pre-mixed Passenger Car & Light Truck formula and the concentrated Propylene Glycol, are engineered to exceed OEM requirements. These fluids protect all cooling system metals, gaskets, and hoses, providing up to 150,000 miles of corrosion protection without the phosphates, nitrates, or silicates found in traditional coolants.
Don’t overlook the final drive and transfer case when maintaining your Endeavor. The transfer case typically requires 1.1 pints of lubricant, while the rear differential needs approximately 2.3 pints. For these applications, AMSOIL SEVERE GEAR synthetic gear lubes in 75W-90, 80W-90, and 75W-110 viscosities provide robust protection. These lubricants contain friction modifiers suitable for limited-slip applications and help reduce operating temperatures, extending the life of gears, seals, and equipment. Finally, for braking and steering systems, AMSOIL’s synthetic DOT 3 and DOT 4 brake fluid and multi-vehicle power steering fluid ensure responsive performance and prevent seal degradation, keeping your vehicle safe and reliable.
About the 2007 Mitsubishi Endeavor
The 2007 Mitsubishi Endeavor is a mid-size SUV that represents a significant chapter in Mitsubishi’s history in the American market. Introduced initially for the 2004 model year, the Endeavor was developed specifically for the North American market to offer a spacious, family-oriented vehicle that competes with popular SUVs from domestic manufacturers. It shares its platform with the Nissan Pathfinder and the Infiniti EX, utilizing a robust unibody construction that blends car-like handling with the utility expected of an SUV. This shared architecture contributes to a comfortable ride quality, making the Endeavor a favorite for daily commuting and long-distance family travel.
Powered by the 3.8-liter 6-cylinder SOHC engine, the Endeavor delivers a strong output of power and torque, rated at 245 horsepower and 249 lb-ft of torque. This naturally aspirated V6 engine, known internally as the 6G75, is designed to pull the substantial weight of the SUV without feeling underpowered. The engine features a durable design with cast iron cylinder liners and a timing chain that, when properly maintained, can last the life of the vehicle. The power is managed by a 4-speed automatic transmission, which, while simple and reliable by design, benefits greatly from the use of synthetic fluids to maintain smooth shifting characteristics and reduce the heat generated during towing or hauling.
Owners of the 2007 Endeavor typically appreciate its generous interior space, which includes seating for seven passengers and a fold-flat third-row seat that provides versatile cargo capacity. The vehicle offers a smooth driving dynamic with independent front and rear suspension, contributing to a comfortable ride that absorbs road imperfections well. However, like many vehicles of its era and class, the Endeavor can benefit from specific maintenance routines to address common wear points as the mileage increases. The 6G75 engine, while reliable, can be susceptible to oil consumption and sludge buildup if conventional oil intervals are strictly followed, especially in severe driving conditions.
One of the primary concerns for 2007 Endeavor owners is the potential for oil consumption, which can be exacerbated by the high mileage common in these vehicles. Synthetic oils like AMSOIL’s 100% synthetic formulations contain advanced additives that help control oil consumption better than conventional oils, ensuring the engine remains protected without the need for frequent top-offs. Another known issue is the buildup of sludge in the engine oil passages, which can restrict oil flow and lead to premature wear on the timing chain and lifters. The superior cleaning properties of AMSOIL motor oils help break down existing sludge and prevent new deposits from forming, keeping the engine internals clean.
Additionally, owners often report issues with the transmission, such as shuddering or harsh shifting, particularly as the vehicle accumulates miles. This can be linked to fluid degradation or oxidation over time. By switching to a high-quality synthetic automatic transmission fluid, transmission performance can be restored, providing smoother gear changes and extending the service life of the transmission components. Lastly, the cooling system in the Endeavor can suffer from corrosion if the antifreeze is not changed regularly. Corrosion can lead to clogged passages and overheating, which is detrimental to the engine’s longevity. Using a phosphate-free, long-life antifreeze like the AMSOIL OAT formulations helps protect the aluminum components of the engine and radiator from corrosion, ensuring the cooling system operates efficiently for years to come.
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