Proper lubrication is the backbone of longevity for any vehicle, but it holds even more significance for the 2016 Lexus GS350. This luxury sedan is powered by the 2GR-FKS engine, a 3.5-liter V6 designed for a balance of spirited performance and refined efficiency. The engine’s design relies heavily on precise oil flow to manage the heat generated by its high-compression combustion chambers and VVT-i (Variable Valve Timing with intelligence) system. If the oil degrades or is of the wrong viscosity, the engine’s variable valve timing components can suffer from sluggish response, reduced fuel economy, and accelerated internal wear.
The recommended oil grade for this engine is 0W-20. This specific viscosity is engineered to provide optimal fuel economy during cold starts while maintaining a protective film at operating temperatures. The 2016 GS350 requires approximately 6.8 quarts of oil when changing the filter, with a separate 6-quart capacity noted for initial fills. It is crucial to refill and check the oil level after every change, ensuring the drain plug is torqued to the specified 30 ft/lbs with a new washer to prevent leaks. The AMSOIL oils listed above meet the required API standards, with AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil offering up to 25,000 miles of protection between changes due to its exceptional thermal stability.
Beyond the engine, the transmission in the 2016 GS350 plays a vital role in the driving experience. Depending on the specific model year and options, the vehicle is equipped with either the A760H 6-speed or the AA81E 8-speed automatic transmission. Both require high-quality synthetic fluid to handle the precise hydraulic pressures and shift speeds. AMSOIL offers both AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid and AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid that are designed to reduce friction and protect against sludge. The 6-speed transmission holds 10.6 quarts for a total fill, while the 8-speed variant requires 10 quarts. Using the correct fluid ensures smooth shifts and prevents the transmission from overheating during aggressive driving or towing.
Coolant, Brakes, and Driveline Protection
The cooling system in the GS350 is equally critical. With a capacity of 9.9 quarts, the system needs a coolant that can protect against corrosion and freezing without damaging aluminum components or rubber hoses. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a phosphate-, nitrite-, and silicate-free formulation that exceeds OEM standards, offering protection for up to 150,000 miles. For those who prefer concentrated coolant, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant is an excellent alternative that requires mixing with distilled water.
For the driveline, the rear differential requires a GL-5 compatible lubricant. The 2016 Lexus GS350 specifies a 75W-85 gear lube for the rear differential, holding approximately 3 pints. AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube is specifically recommended to handle the load and friction of the differential, containing friction modifiers suitable for limited-slip applications if the vehicle is equipped with one. The front differential is typically sealed and serviced less frequently but also benefits from AMSOIL SEVERE GEAR® products in 80W-90 or 75W-90 viscosities depending on ambient temperatures.
Finally, the braking system of the GS350 demands fluid that maintains a high boiling point to prevent vapor lock during spirited driving. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid ensures that the brakes remain responsive and safe, providing a stable viscosity from freezing cold mornings to hot stops on the track or mountain passes. Regular maintenance of these fluids keeps the vehicle’s hydraulic systems operating as the engineers intended, preserving the ride quality and safety features that define the Lexus brand.
About the Vehicle
The 2016 Lexus GS350 is a standout in the compact executive sedan segment, continuing the legacy of the GS line that blends sporty handling with the plush comfort expected of a luxury brand. Built on Toyota’s proven N platform, this vehicle shares its DNA with other high-performance Toyota vehicles, ensuring a robust foundation for the sophisticated technology housed within. The GS350 is powered by the 3.5L V6 engine, a naturally aspirated powerhouse that delivers a smooth, linear flow of power rather than the sudden surge of a turbocharged unit. This engine, known as the 2GR-FKS, is celebrated for its reliability and efficiency, making it a favorite among enthusiasts who prefer a naturally aspirated driving feel.
Drivers often choose the GS350 for its exceptional balance between comfort and agility. The chassis tuning provides a engaging drive characteristic that allows the car to corner with poise, while the interior is equipped with high-quality materials and advanced infotainment systems typical of Lexus. The vehicle’s reputation is built on its reliability; the 2GR-FKS engine has a long history of durability, and the 2016 model years are no exception. It is a vehicle that appeals to both daily commuters looking for a comfortable ride and driving enthusiasts who want a sedan that can be taken to a twisty backroad. The GS350 sits between the sportier IS series and the larger LS flagship, offering a sweet spot in the lineup that delivers performance without sacrificing the refinement Lexus is famous for. Owners appreciate its quiet cabin, precise steering, and the confidence that comes from knowing the vehicle is built to last with proper care.
When looking for a reliable sedan that offers a spirited driving experience without the complexity of forced induction, the GS350 remains a top contender. Its design focuses on creating a seamless connection between the driver and the road, aided by technologies like Active Noise Cancellation and a refined suspension system. Whether navigating city traffic or cruising on the interstate, the 2016 GS350 delivers a sense of security and performance that has kept it popular in the luxury car market. Regular maintenance with high-quality synthetic fluids ensures that this sophisticated machine continues to perform at its best for years to come.