Ensuring your 2021 Toyota GR Supra receives the correct lubricants is essential for maintaining its high-performance character and engine longevity. The B46B20O0 7 Turbo engine and the 8HP51 automatic transmission are precision-engineered components that demand fluids capable of withstanding extreme temperatures, high RPMs, and the unique stresses of modern performance driving. Using the wrong viscosity or quality of fluid can lead to reduced power, increased wear, and potential damage to sensitive components. AMSOIL synthetic lubricants are formulated specifically to exceed original equipment manufacturer requirements, offering superior protection in both the most demanding driving conditions and daily commuting scenarios.
Recommended AMSOIL Products
- AMSOIL 0W-20 LS 100% Synthetic European Motor Oil – Engineered for the specific demands of the GR Supra’s turbocharged engine, this fluid features a precise blend of synthetic base oils and premium additives designed to protect European performance vehicles while ensuring excellent flow at cold start and stability under heavy load.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – This fluid is designed to withstand the rigors of heavy towing, elevated temperatures, and challenging terrain, ensuring the 8HP51 transmission remains fluid in sub-zero conditions while providing reserve protection during heavy use and abuse.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – This unique poly-organic acid (OAT) formulation provides engine protection up to 150,000 miles or 5 years, safeguarding cooling system metals, gaskets, and hoses against corrosion without the need for phosphates, nitrites, or borates.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – For those preferring a concentrated formula, this product offers protection up to 150,000 miles or 5 years in passenger cars and light trucks, greatly surpassing standards for metallic corrosion and erosion when mixed with distilled water.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Providing excellent ABS and traction-control responsiveness, this fluid maintains stable viscosity over a wide temperature range, ensuring consistent brake pedal feel and preventing boiling during spirited driving.
Engine Oil and Filter Specifications
The heart of the 2021 Toyota GR Supra 2.0L is the B46B20O0 7 Turbo engine, which requires a specific oil viscosity to operate efficiently within its tight tolerances. AMSOIL recommends 0W-20 viscosity for all temperature ranges, a specification that balances immediate lubrication during cold starts with the necessary film strength to protect the turbocharger at high operating temperatures. The engine oil capacity is 5.5 quarts when the oil filter is replaced. After refilling, it is critical to check the oil level to ensure the sump is neither overfilled nor underfilled, which can affect the crankcase ventilation and oil consumption rates.
When performing a service, the oil drain plug requires a specific torque of 18 ft/lbs. It is also a best practice to replace the drain plug gasket every time the oil is changed to prevent leaks and ensure a secure seal. The AMSOIL 0W-20 LS 100% Synthetic European Motor Oil is particularly well-suited for this application because its European formula includes a precise blend of synthetic base oils and premium additives designed for the unique demands of high-performance gasoline and diesel vehicles. This ensures that the engine remains clean and protected even under the severe conditions often encountered by sports car owners.
Transmission and Differential Fluids
The automatic transmission in the GR Supra utilizes the 8-speed 8HP51 unit, a sophisticated gearbox that benefits significantly from synthetic lubrication. For the full capacity, the transmission requires 9.6 quarts of fluid. The recommended AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is engineered to handle the high thermal loads generated by the transmission during aggressive driving. It remains fluid even in sub-zero temperatures, ensuring smooth shifting, while its additive package protects against wear and sludge formation.
While the vehicle does not have a manual transmission, it does feature a rear differential that requires attention. The capacity for the rear differential is approximately 2.1 pints. Proper lubrication here is vital for the durability of the limited-slip or open differential components, ensuring that power is transferred efficiently to the rear wheels without excessive friction or heat buildup.
Cooling System and Brake Fluid
Effective thermal management is crucial for the B46B20O0 turbo engine. The cooling system capacity varies depending on whether the vehicle is equipped with the LTCC4 (4.2 quarts) or HTCC10 (10.5 quarts) system. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is an ethylene glycol 50/50 pre-mix that offers protection for up to 150,000 miles or five years. It is free of phosphates, nitrates, nitrites, silicates, borates, and amines, making it safe for all cooling system metals, gaskets, and hoses while being compatible with other antifreeze colors.
The braking system on the GR Supra demands high-performance fluid to handle the heat generated during track days or spirited canyon runs. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is recommended to ensure stable viscosity and excellent responsiveness. This fluid helps prevent brake fade and maintains pedal feel, which is essential for the safety and control of a high-performance sports car.
Why Owners Like This Vehicle
The 2021 Toyota GR Supra 2.0L represents a significant moment in automotive history, marking the return of a legendary nameplate in a modern, sophisticated package. Developed in collaboration with BMW, this model shares its platform with the Z4, yet it has carved out its own distinct identity as a focused, driver-oriented sports coupe. The rear-wheel-drive layout, near-perfect 50/50 weight distribution, and balanced handling characteristics make it a favorite among enthusiasts who appreciate the purity of driving dynamics. The 2.0-liter inline-four turbocharged engine delivers responsive power and impressive torque, proving that you don’t need eight or ten cylinders to enjoy thrilling performance.
Owners often cite the Supra’s blend of modern technology and classic roadster soul as a key selling point. The interior strikes a balance between driver-centric ergonomics and luxury, while the exterior design pays homage to the iconic 1990s model with subtle nods to its heritage. It is a vehicle that feels at home on a race track but remains comfortable enough for daily commuting, thanks to its refined ride quality and sophisticated suspension tuning. The Supra has gained a reputation as a tuner-friendly platform, with a vast community of owners eager to modify their vehicles for even greater performance.
Despite its reputation for excellence, the 2021 GR Supra does face specific challenges that AMSOIL synthetic lubricants are well-positioned to mitigate. First, the turbocharged engine can experience carbon buildup on the intake valves due to Direct Gasoline Injection (GDI). This accumulation can reduce airflow and performance over time; AMSOIL P.i. Performance Improver gasoline additive is effective at restoring fuel injectors to 100% flow rate and helping prevent carbon buildup, keeping the engine running smoothly. Second, the high thermal loads placed on the turbocharger can lead to oil degradation and carbonization in the turbo bearings. AMSOIL’s synthetic motor oils resist oxidation and thermal breakdown better than conventional oils, ensuring the turbo spins cleanly and for longer periods. Third, the 8-speed automatic transmission, while advanced, can suffer from heat-related wear during aggressive driving. The specialized formulation of AMSOIL transmission fluid maintains its viscosity under extreme heat, protecting the transmission’s internal clutches and bands. Finally, the AMSOIL synthetic brake fluid high boiling point is crucial for maintaining safety during repeated hard stops, preventing the fluid from vaporizing and causing a loss of braking power.