The 2016 Toyota Highlander equipped with the 3.5L V6 (Engine Code 2GR-FXE 7) relies on precise lubrication to maintain its reputation for durability and smooth performance. Whether you are commuting daily, towing small loads, or enjoying extended road trips, using the correct synthetic fluids is essential for maximizing engine life and fuel efficiency. This guide outlines the specific AMSOIL products recommended for this hybrid-capable engine, covering everything from the oil change to transmission and cooling system maintenance.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – The top choice for unsurpassed engine protection, offering up to 25,000 miles of guaranteed performance and superior resistance to wear and horsepower loss.
- AMSOIL 0W-20 100% Synthetic Hybrid Motor Oil – Specially formulated for the demands of hybrid powertrains, this oil maximizes fuel economy and provides superior control over sludge and deposits.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – Offers an excellent balance of cleaning power and protection, delivering up to 20,000 miles of guaranteed service life between changes.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – An OEM-recommended option that outperforms conventional oils, fighting sludge and deposits while meeting standard mileage intervals.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Designed for vehicles with over 75,000 miles, featuring boosted detergents and enhanced anti-wear additives to reduce sludge and keep older engines running smoother.
- AMSOIL Oil Filter – Provides 99% filtration efficiency at 20 microns and greater capacity for contaminants than standard filters to help reduce engine wear during extended intervals.
- WIX Oil Filter – A premium media filter that offers improvements over original equipment manufacturer-branded filters for reliable protection during standard service intervals.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A pre-mixed ethylene glycol formulation designed to exceed OEM requirements and protect cooling system metals for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated, non-toxic alternative that delivers up to 150,000 miles of protection in passenger vehicles while meeting strict environmental standards.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing, high temperatures, and challenging terrain while remaining fluid in sub-zero conditions for optimal shift performance.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Provides protection against wear and offers a fuel-efficient formulation compatible with the original manufacturer specifications.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Ensures excellent ABS and traction-control responsiveness with stable viscosity across a wide temperature range for consistent braking safety.
Why Engine Oil Matters for the 3.5L Highlander
The 3.5L V6 engine in your 2016 Highlander is a sophisticated powerplant designed for both power and efficiency, often serving as a hybrid in certain configurations. This specific engine, identified by code 2GR-FXE 7, requires a low-viscosity oil to ensure rapid lubrication during cold starts and optimal flow at operating temperatures. The manufacturer recommends 0W-20 viscosity to achieve the best fuel economy and starting performance in cold weather. However, maintaining this viscosity is critical; you must replace it with 0W-20 at the next oil change to ensure the engine receives the proper protection it was designed for.
AMSOIL synthetic oils are engineered to handle the thermal stresses of this engine far better than conventional oils. The Signature Series, for instance, is tested to provide 75% more engine protection against horsepower loss and wear compared to industry standards. For owners who prioritize maximum extended service intervals, the Signature Series offers a guaranteed 25,000 miles of protection. If your Highlander has accumulated significant mileage, the High-Mileage formula uses unique chemistry to address oil consumption and sludge, which can become more prevalent as engines age.
The oil capacity for this engine is 6.4 quarts when performing a complete oil change including the filter. After refilling, it is crucial to check the oil level to ensure the correct amount is present. A new washer must also be installed on the drain bolt, which should be torqued to 30 ft/lbs. By pairing your oil choice with a high-quality filter like the AMSOIL Oil Filter or WIX Oil Filter, you ensure that contaminants are captured efficiently, allowing the engine parts to stay lubricated and reducing wear over time.
Transmission and Cooling System Fluids
Beyond the engine, the automatic transmission in your Highlander is a complex system that benefits greatly from synthetic fluid. The AMSOIL Signature Series Fuel-Efficient Automatic Transmission Fluid is designed to withstand the rigors of heavy towing, elevated temperatures, and challenging terrain. It remains fluid even in sub-zero temperatures, providing reserve protection during heavy use and abuse. For those who prefer a standard OEM-specification fluid, the OE Fuel-Efficient variant offers protection against wear while maintaining fuel efficiency.
Capacity for the automatic transmission is 4.9 quarts for a total fill. Keeping the transmission fluid fresh is vital for preventing wear, sludge, and temperature-related issues. Switching to a synthetic transmission fluid can help drive with confidence, knowing that your transmission is protected from the internal friction and heat that leads to costly repairs. Additionally, the cooling system requires attention. The 2016 Highlander utilizes a hybrid inverter system which requires 2 quarts of AMSOIL Passenger Car & Light Truck Antifreeze & Coolant. The main engine cooling system capacity is significantly higher at 14.3 quarts.
For the cooling system, you can choose between the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant, a pre-mixed ethylene glycol formula that is phosphate-free and compatible with all coolant colors. Alternatively, the concentrated AMSOIL Propylene Glycol Antifreeze and Engine Coolant offers a highly effective, non-toxic option that greatly surpasses metallic corrosion standards. Both options protect all cooling system metals, gaskets, and hoses for up to 150,000 miles or 5 years.
Other Essential Fluids and Maintenance
Maintaining your Highlander also involves checking and replacing AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid. The vehicle utilizes hydraulic brake fluid meeting DOT 3 standards. This brake fluid is an excellent upgrade that provides a stable viscosity over a wide temperature range, ensuring excellent responsiveness for your ABS and traction control systems. This fluid helps eliminate the sponginess that can develop in older brake systems.
While the 2016 Highlander does not require differential or transfer case lubricant changes as frequently as some off-road vehicles, ensuring all seals are intact and fluids are correct is part of a comprehensive maintenance plan. For owners who plan to store their vehicle or drive it seasonally, AMSOIL offers a range of additives and stabilizers. The AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, while the AMSOIL Engine Fogging Oil provides a rust preventive coating for internal components during long periods of inactivity.
For those looking to enhance performance or clean the fuel system, the AMSOIL P.i. Performance Improver is a powerful gasoline additive that restores GDI fuel injectors to 100% flow rate, potentially restoring up to 14% horsepower and improving fuel economy. Regular use of these products ensures that your Highlander remains in peak operating condition, ready for any driving scenario you encounter.
Vehicle Background
The 2016 Toyota Highlander is a staple in the midsize SUV market, known for blending family-friendly versatility with Toyota’s renowned reliability. This model year sits within the third generation of the Highlander, which introduced a more refined design and improved interior space compared to its predecessors. Under the hood, the 3.5L V6 engine is a versatile power unit, available in both standard and hybrid configurations. The engine code 2GR-FXE 7 specifically denotes the hybrid application, which pairs the V6 with electric motors to deliver a balance of power and fuel efficiency that is highly regarded by owners.
Owners of the Highlander appreciate the vehicle’s comfortable ride quality, spacious cargo area, and the availability of all-wheel drive, which makes it a capable choice for various climates. The 2016 model continued to build on the reputation of the line, offering a smooth driving character that appeals to daily commuters and long-distance travelers alike. With a reputation for longevity and strong resale value, the Highlander is often recommended for families seeking a reliable three-row SUV. Whether used for school runs, road trips, or local errands, the Highlander’s design focuses on practicality and comfort, making it one of the more popular choices in its class.
Maintaining this vehicle with high-quality synthetic lubricants helps preserve the integrity of the engine and transmission, ensuring that the Highlander continues to perform reliably for many years. By following the recommended fluid specifications and using premium AMSOIL products, owners can extend the service life of their vehicle and maintain its value. The Highlander’s engineering is solid, but the longevity of the powertrain ultimately depends on the quality of the fluids inside it.