The heart of the 2016 Lexus RC350 is its 3.5-liter V6 engine, designated as the 2GR-FSE 2. This direct-injection powerhouse requires a specific oil viscosity to ensure proper lubrication during cold starts and under high-load conditions. The manufacturer specifies 0W-20 viscosity for optimal fuel economy and engine protection. The total oil capacity for a change, including the filter replacement, is approximately 6.8 quarts. For standard service intervals, it is crucial to refill with the exact 0W-20 grade to maintain the warranty and engine performance. After refilling, the oil level should always be checked to ensure it is within the safe operating range.
AMSOIL offers several formulations of 0W-20 synthetic motor oil to suit different driving needs. The Signature Series is the premier option, delivering 75% more engine protection against horsepower loss and wear compared to other brands. It provides up to 25,000 miles of protection between changes, which is ideal for those who want to maximize their maintenance intervals without sacrificing protection. For drivers who prefer a reliable alternative with extended performance, the Extended-Life option offers 20,000 miles of protection with 37% more cleaning power to keep the engine internals free of deposits. The OE formula is an excellent choice for those seeking OEM-level performance at a more accessible price point, while the High-Mileage variant features enhanced detergents and anti-wear additives specifically for engines with over 75,000 miles.
Oil filtration is just as critical as the oil itself. The RC350 utilizes a spin-on filter that must be replaced during every oil change. The AMSOIL Oil Filter EA15K49 provides a filtering efficiency of 99 percent at 20 microns, which is significantly higher than standard filters. This high-efficiency filtration captures small, wear-causing contaminants and allows for lower restriction, ensuring that clean oil flows freely to all critical engine components. For those who prefer the WIX brand, the 57173 filter also offers premium media that outperforms original equipment manufacturer options. Installing a new washer on the drain plug and torquing it to 30 ft/lbs is essential for a leak-free seal.
Transmission and Differential Lubrication
The transmission system in the RC350 is engineered for precise shifting and durability. Depending on the specific transmission type (such as the AA81E or A760H), the fluid capacity varies. The 8-speed automatic transmission requires a total fill of 10 quarts for a complete exchange, with an initial fill capacity of 3.4 quarts. The 6-speed automatic transmission typically requires 10.6 quarts for a total fill. Maintaining the correct fluid level and quality is vital to prevent slippage and wear.
AMSOIL Signature Series Fuel-Efficient 100% Synthetic 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 and provides reserve protection during heavy use, ensuring smooth shifting even under stress. The OE Fuel-Efficient alternative offers similar protection with a focus on standard service intervals. These fluids help extend transmission life by reducing wear and maintaining proper hydraulic function.
For the differential and transfer case components, proper gear lubrication is key to handling the torque and power of the V6 engine. The front AWD differential requires specific lubrication, typically filling 1.5 pints. The rear standard differential holds 3 pints, and for limited-slip differentials, a specific gear lube is recommended to prevent chatter and ensure smooth engagement. AMSOIL SEVERE GEAR lubricants in viscosities such as 75W-85, 75W-90, 80W-90, and 75W-110 provide advanced protection against wear, rust, and corrosion. These synthetic gear lubes contain friction modifiers for limited-slip applications and help reduce operating temperatures, extending the life of seals and gears.
Cooling System and Brake Fluid Maintenance
The cooling system in the 2016 Lexus RC350 requires a robust antifreeze and coolant mixture to prevent overheating and corrosion. The system capacity is approximately 10.1 quarts. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a 50/50 pre-mix formulation that is compatible with all other antifreeze colors and free from harmful additives like phosphates and nitrates. It offers protection up to 150,000 miles or five years. For those who prefer to mix their own, the concentrated AMSOIL Propylene Glycol Antifreeze provides superior corrosion and erosion protection and can be used for extended intervals.
Brake safety is paramount, and the RC350 utilizes a DOT 3 compatible hydraulic brake system. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid ensures excellent ABS and traction-control responsiveness. Its stable viscosity over a wide temperature range prevents brake fade and ensures consistent pedal feel, making it a superior choice over conventional glycol-based fluids.
Vehicle Background
Launched as a coupe variant of the Lexus IS platform, the 2016 Lexus RC350 represents a significant evolution in the brand’s sports coupe lineup. It was designed to compete directly with other luxury sports coupes in the market, offering a blend of aggressive styling and refined performance. The vehicle features a front-engine, rear-wheel-drive layout with an all-wheel-drive option available for the RC350 AWD model. This configuration contributes to its balanced handling characteristics, providing drivers with a engaging and predictable driving dynamic.
The 3.5-liter 2GR-FSE V6 engine is a hallmark of Lexus performance engineering from this era. Known for its reliability and smooth power delivery, this engine utilizes direct injection technology to enhance both power and fuel efficiency. It produces a healthy amount of horsepower, allowing the RC350 to accelerate confidently while maintaining a composed ride quality. The interior of the RC350 reflects Lexus’s commitment to luxury, featuring high-quality materials, ergonomic seating, and advanced technology packages. It is a vehicle that appeals to those who appreciate a sophisticated aesthetic without compromising on driving satisfaction.
Owners of the 2016 RC350 often praise its versatility. It serves as a capable daily driver that can handle long commutes with ease, yet it transforms into a thrilling sports car when the road opens up. The vehicle’s reputation for reliability means that proper maintenance is the key to enjoying its performance for years to come. Using high-quality synthetic lubricants ensures that the complex mechanical systems, from the transmission to the differential, continue to operate smoothly. Whether navigating city streets or cruising on the open highway, the RC350 delivers a premium driving experience that is both refined and powerful.