Keeping your 2009 Infiniti G37 performing at its peak requires more than just following a maintenance schedule; it demands the right lubricants engineered to handle the specific demands of its 3.7-liter VQ37VHR engine. This vehicle, known for its smooth power delivery and sporty character, operates under a range of conditions from daily commuting to spirited driving on winding roads. Using premium synthetic lubricants ensures that the engine, transmission, and all other fluid systems receive the protection they need against wear, heat, and sludge. Whether your vehicle has high mileage or is in the early stages of its life cycle, selecting the correct fluids is essential for longevity and performance.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – The ultimate protection for the VQ37VHR engine, offering up to 25,000 miles of service and superior resistance to horsepower loss and wear.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Provides extended protection for up to 20,000 miles with 37% more cleaning power to keep the engine running smoother.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – An excellent choice that outperforms conventional oils while delivering 100% synthetic protection against sludge and deposits.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically formulated for engines with over 75,000 miles, featuring enhanced detergents and reduced sludge.
- AMSOIL Oil Filter – Engineered to capture wear-causing contaminants with 99% efficiency at 20 microns and offers extended service life.
- WIX Oil Filter – A high-quality alternative featuring premium media that offers improvements over OEM-branded filters.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Designed to withstand heavy towing and elevated temperatures while remaining fluid in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Protects against wear and promotes smooth, shudder-free shifts for the RE7R01A transmission.
- AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube – Ideal for the FS6R31A 6-speed manual gearbox, offering excellent cold-flow properties and protection for brass synchronizers.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Ensures excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A long-life 50/50 pre-mix formulation that protects cooling system metals, gaskets, and hoses for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated, phosphate-free option that greatly surpasses corrosion and erosion standards for passenger cars and light trucks.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – Advanced protection against wear and thermal runaway for front and rear differentials requiring GL-5 specifications.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Helps seals remain soft to prevent leaks and resists heat for long fluid life in the G37 power steering system.
The heart of the 2009 Infiniti G37 is the VQ37VHR engine, a 3.7-liter V6 that was renowned for its refined power delivery and high-revving nature. To extract the best performance from this sophisticated powerplant, the engine oil must provide a robust protective film even at high RPMs. The 2009 model year is part of the second generation of the G37 lineup, which succeeded the G35 and solidified Infiniti’s reputation for blending sporty dynamics with luxury comfort. Owners of this vehicle often value its responsive steering and the smooth, linear power curve of the 3.7-liter VQ series. Because the engine operates at higher temperatures and stresses compared to standard commuter cars, the oil filter selection is critical.
AMSOIL Signature Series 5W-30 is the top-tier recommendation for this engine. This 100% synthetic motor oil is engineered to provide 75% more engine protection against horsepower loss and wear than the leading competitor oils. It is guaranteed for up to 25,000 miles or one year under normal driving conditions, significantly reducing the frequency of oil changes while maximizing engine life. For those who prefer a slightly more budget-friendly option without sacrificing synthetic benefits, the AMSOIL OE 5W-30 100% Synthetic Motor Oil offers an excellent alternative. It fights sludge and deposits effectively and is designed to outperform conventional oils, ensuring that the VQ37VHR remains clean and protected.
For vehicles that have accumulated significant mileage, the AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil is a specialized solution. If your G37 has over 75,000 miles, this formulation features boosted detergents and dispersants along with enhanced anti-wear additives to reduce sludge by 67%. It is guaranteed for 12,000 miles or one year and helps older engines perform better. Regardless of which oil you choose, filtration is equally important. The AMSOIL Oil Filter is designed to work in tandem with these oils, providing 99% filtering efficiency at 20 microns. It allows for lower restriction, keeping engine parts lubricated and reducing the capacity for small, wear-causing contaminants. For those who prefer a widely recognized brand, the WIX Oil Filter is also a valid recommendation, offering premium media that improves upon standard OEM filters.
Moving beyond the engine, the transmission of the 2009 G37 requires precise attention. The automatic transmission, specifically the 7-speed RE7R01A model, demands a fluid that can handle the rigors of modern shifting patterns. The AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is ideal for this application, offering reserve protection during heavy use and maintaining fluidity in sub-zero temperatures. It is designed to withstand elevated temperatures, making it perfect for spirited driving. If your G37 features a manual transmission, such as the 6-speed FS6R31A, the AMSOIL 75W-90 Manual Transmission & Transaxle Gear Lube provides outstanding cold-flow properties. This fluid is friction-modified to protect brass synchronizers and ensures smooth shifting while inhibiting rust and corrosion. It offers a long service life and excellent seal compatibility, which is crucial for maintaining the integrity of the gearbox.
Brake performance is another critical safety component that benefits from synthetic technology. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid ensures excellent responsiveness for both ABS and traction-control systems. Its stable viscosity over a wide temperature range means consistent braking feel in both winter and summer conditions. The cooling system also plays a vital role in the longevity of the G37. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a unique poly-organic acid (OAT) formulation that protects all cooling system metals, gaskets, and hoses for up to 150,000 miles. It is compatible with all other antifreeze colors and is phosphate-free, making it a safe choice for the aluminum components often found in the VQ37VHR cooling system. For high-performance needs, Propylene Glycol Antifreeze is also available.
The differential systems in the G37 also benefit from high-performance gear lubes. Whether for the front or rear differential, the AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube offers advanced protection against wear and thermal runaway. It controls operating temperatures and contains friction modifiers for limited-slip applications, which is a common feature in performance-oriented sedans like the G37. The rear differential requires approximately 3 pints, while the front requires 1.4 pints, with torque specifications of 26 ft/lbs for the fill plugs. Additionally, the power steering system benefits from the AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid. This fluid helps seals remain soft to prevent leaks and offers strong anti-wear protection, ensuring quiet operation and resistance to heat for a long fluid life.
Vehicle Background and History
The 2009 Infiniti G37 represents a significant milestone in the brand’s evolution as a competitor to German luxury sport sedans. Introduced as the successor to the G35, the G37 was part of the second generation of the G series, which debuted in 2007. This model year continued the lineage of the G37 coupe and sedan, both of which were powered by the legendary VQ37VHR engine. This 3.7-liter naturally aspirated V6 was an evolution of the VQ35 series, offering increased displacement, more power, and improved efficiency. The engine was capable of producing around 325 horsepower, providing a driving experience that was both responsive and refined.
Owners of the 2009 G37 often cite its balanced handling as a primary reason for ownership. The vehicle featured a rear-wheel-drive layout (with an all-wheel-drive option available for the sedan in certain markets and model years), which contributed to its sporty character. The chassis was tuned for agility, offering sharp turn-in and a confident feel on the road. The interior maintained Infiniti’s commitment to luxury, with high-quality materials and ergonomic designs that supported long-distance driving. The G37 was also celebrated for its reliability, particularly when maintained with high-quality synthetic fluids that protect the engine and transmission from the stresses of daily driving and occasional track use.
The G37’s reputation for being a “driver’s car” within the luxury segment made it a favorite among enthusiasts who appreciated the blend of performance and practicality. Whether used as a daily commuter or a weekend toy, the G37 offered a level of engagement that was rare for a mass-market luxury vehicle. The availability of a manual transmission for the coupe version further enhanced its appeal to purists who enjoyed the tactile connection of shifting gears. Over the years, the G37 has garnered a dedicated following, with many owners extending the life of their vehicles well beyond the typical lifespan through diligent maintenance and the use of premium lubricants.
Maintenance of the 2009 Infiniti G37 is straightforward but demands attention to detail. Regular oil changes are the most critical aspect of keeping the VQ37VHR engine healthy. Using the correct viscosity and a high-quality oil filter ensures that the engine runs smoothly and efficiently. The transmission fluid, gear lube, and coolant also play vital roles in the overall health of the vehicle. By using AMSOIL products, owners can extend service intervals while maintaining superior protection against wear and tear. The 2009 G37 is a vehicle that rewards attentive ownership with years of reliable, spirited performance, making it a worthwhile investment for those who value automotive engineering and driving dynamics.