The 2009 Lexus IS F represents the pinnacle of Lexus performance engineering, combining a naturally aspirated V8 engine with a sophisticated chassis designed for the track. To maintain the integrity of this high-output machine, selecting the correct lubricants is not merely a maintenance task but a critical component of preserving its performance characteristics. The 5.0-liter 2UR-GSE G engine operates at high temperatures and demands fluid that can withstand extreme shear stress while providing superior protection against wear. Using fluids that meet or exceed the rigorous standards of the manufacturer ensures that the engine, transmission, and differential systems continue to operate with precision, longevity, and the responsive feel that IS F owners expect.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Offers the highest level of protection with 75% more resistance to horsepower loss and wear, ideal for high-performance driving and extended change intervals up to 25,000 miles.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Features 37% more cleaning power than standard OE options and provides 20,000 miles of guaranteed protection, keeping the engine running smoother for longer.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A cost-effective option that outperforms conventional oils while effectively fighting sludge and deposits with a 100% synthetic formulation.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Formulated specifically for engines with over 75,000 miles, featuring enhanced detergents and reduced sludge to help high-mileage vehicles perform better.
- AMSOIL Oil Filter – Provides 99% filtering efficiency at 20 microns with greater capacity for contaminants, ensuring maximum engine protection and reduced wear.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands the rigors of heavy towing, elevated temperatures, and challenging terrain while remaining fluid in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Provides reliable protection against wear for the AA80E 8-speed automatic transmission.
- AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube – Controls thermal runaway and rust in the rear differential while reducing operating temperatures and extending equipment life.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A pre-mix formulation designed to exceed OEM requirements and protect cooling system metals, gaskets, and hoses for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option that requires mixing, offering protection up to 150,000 miles or 5 years and greatly surpassing standards for metallic corrosion.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS and traction-control responsiveness with stable viscosity across a wide temperature range.
Maintaining the 2009 Lexus IS F requires attention to detail that goes beyond standard maintenance intervals. The 2UR-GSE engine is a robust V8 that produces significant power, generating substantial heat under load. Standard conventional oils can break down under these conditions, leading to increased friction, wear, and potential loss of performance. AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil and AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil are engineered to withstand these extreme environments, ensuring that the engine internals remain clean and properly lubricated. This is particularly important for the IS F, which was designed to compete on the track as well as the highway. The oil change capacity for this vehicle is 9.8 quarts when the filter is replaced, a detail that ensures the correct amount of fluid is used for optimal circulation and cooling. Using an oil filter like the AMSOIL Oil Filter is equally critical, as it is designed to trap small, wear-causing contaminants that standard filters might miss, extending the life of critical engine components.
Transmission and Differential Fluids
The transmission system in the 2009 IS F, specifically the AA80E 8-speed automatic, is a marvel of engineering that requires fluid capable of handling rapid shifts and high torque loads. AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid and the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid are the top choices. Both are 100% synthetic formulations designed to maintain viscosity in extreme temperatures, ensuring smooth shifting whether the car is sitting in a traffic jam or accelerating out of a corner. The capacity for a total fill is 11.6 quarts, with an initial fill of 3.6 quarts, highlighting the importance of using the correct fluid quantity. The differential, a rear-wheel drive component essential for the IS F’s handling dynamics, requires a heavy-duty lubricant. The AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube is recommended, as it contains friction modifiers for limited-slip applications and helps reduce operating temperatures to prevent thermal runaway, a common issue in high-performance differentials.
Cooling and Brake Systems
A cooling system failure can be catastrophic for a high-performance engine, making the choice of AMSOIL Passenger Car & Light Truck Antifreeze & Coolant vital. The IS F requires 12.6 quarts of AMSOIL Passenger Car & Light Truck Antifreeze & Coolant or AMSOIL Propylene Glycol Antifreeze and Engine Coolant to fill the system completely. Owners can choose between the pre-mix option, ready to use, or the concentrated AMSOIL Propylene Glycol Antifreeze and Engine Coolant for those who prefer mixing their own. Both products are phosphate-free and borate-free, ensuring compatibility with all cooling system metals and seals while providing protection against corrosion for up to 150,000 miles or five years. The brake system is another critical safety component. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid offers superior boiling points and stability compared to conventional fluids. This stability ensures consistent pedal feel and responsiveness, which is crucial for the IS F’s high-speed braking capabilities. The fluid’s low volatility prevents brake fade, ensuring that the driver maintains control even under severe stop-and-go driving or track conditions.
Seasonal Storage and Additional Protection
For owners who may not drive their IS F year-round, seasonal protection is essential. AMSOIL AMSOIL Gasoline Stabilizer can be added to the fuel tank to keep fuel fresh for up to 12 months, preventing the varnish and gum buildup that can clog fuel injectors during storage. Additionally, AMSOIL AMSOIL Engine Fogging Oil can be used to coat internal engine components, protecting them from rust and corrosion during long periods of inactivity. For general vehicle maintenance, AMSOIL P.i.® Performance Improver is a potent fuel additive that can restore lost horsepower and clean GDI fuel injectors, ensuring the engine runs as efficiently as possible. Regular cleaning with products like the AMSOIL Heavy-Duty Degreaser or the AMSOIL Power Foam® Carburetor and Induction-System Cleaner can also keep the engine bay and induction system free of harmful deposits. These additional steps, combined with the core fluid recommendations, provide a comprehensive care plan for the 2009 Lexus IS F.
About the 2009 Lexus IS F
The 2009 Lexus IS F stands as a unique milestone in automotive history, representing Lexus’s serious foray into the world of high-performance sports sedans. Unlike many competitors that rely on forced induction to generate power, the IS F is powered by the legendary 5.0-liter 2UR-GSE V8 engine. This naturally aspirated powerhouse was designed to deliver a linear and responsive power delivery that many enthusiasts consider a benchmark in the segment. The engine produces approximately 416 horsepower and 370 lb-ft of torque, allowing the IS F to achieve 0 to 60 mph times in the high four-second range, rivaling sports cars that cost significantly more.
Built on the Lexus IS platform but extensively re-engineered, the IS F features a reinforced chassis, a Torsen® limited-slip differential, and a sophisticated six-speed automatic transmission with sequential shift mode. The suspension was also tuned specifically for performance, utilizing a multi-link rear setup and adaptive variable suspension to balance track capability with daily drivability. The exterior design includes aggressive styling cues such as the signature mesh grille, large air intakes, and unique 19-inch alloy wheels, giving the sedan a distinctive road presence. Inside, the cabin is outfitted with sport seats, a leather-wrapped steering wheel, and a head-up display, blending luxury with performance intent. The IS F was widely praised for its reliability, build quality, and the unique character of its engine sound, often cited as one of the finest examples of a “gentleman’s racing car.” It serves as a powerful reminder that Japanese automakers can produce vehicles that meet both the strict demands of luxury buyers and the high-performance aspirations of driving enthusiasts.