The 2009 Infiniti EX35 is a premium crossover that combines the refined driving dynamics of a sedan with the practical utility of an SUV. Under the hood lies the robust 3.5L VQ35HR V6 engine, a powerplant known for its smooth power delivery and engineering excellence. To maintain the performance and longevity of this sophisticated machine, owners must prioritize the use of high-quality lubricants. Synthetic motor oil is not merely a suggestion for this vehicle; it is the standard required to handle the heat and stress of the VQ35HR engine. Using the correct oil and compatible filters ensures optimal protection against wear, sludge, and viscosity breakdown, keeping the vehicle running as intended by its designers.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – The top-tier choice offering up to 25,000 miles of protection and exceptional horsepower retention.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – A robust option providing up to 20,000 miles of protection with superior cleaning power.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – An economical 100% synthetic alternative that outperforms conventional oils and fights sludge.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specially formulated for engines with over 75,000 miles to reduce sludge and oil consumption.
- AMSOIL Oil Filter – Provides 99% filtration efficiency at 20 microns and extended service life to match synthetic oil intervals.
- WIX Oil Filter – Premium media offering improvements over original equipment manufacturer-branded filters for conventional change intervals.
The 2009 Infiniti EX35 operates on a specific 5W-30 viscosity grade for all temperature conditions. When performing an oil change, the engine requires a total capacity of 5.2 quarts when the AMSOIL Oil Filter is replaced. It is critical to allow the oil to settle after refilling and then check the oil level against the dipstick to ensure the correct quantity. The drain plug torque should be set to 25 ft-lbs to prevent leaks or damage to the pan threads. For this specific application, the AMSOIL OE 5W-30 100% Synthetic Motor Oil or the AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil are highly recommended due to their ability to withstand the high operating temperatures of the VQ35HR engine.
Transmission and Drivetrain Lubrication
The automatic transmission in the 2009 EX35 is a critical component that benefits significantly from synthetic fluid. The RE5R05A transmission requires a total fill capacity of 10.9 quarts. Using a standard fluid may lead to wear or sluggish shifts over time, whereas AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid and AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid are engineered to remain fluid in sub-zero temperatures and withstand the rigors of heavy towing or elevated temperatures. These fluids protect against wear and resist harmful sludge, ensuring smooth, shudder-free shifts. Additionally, the transfer case and differentials require specific gear lubes. The front differential holds 1.4 pints of fluid, while the rear differential requires 3 pints. The transfer case, if equipped, generally holds 2.7 pints. For these components, AMSOIL SEVERE GEAR 80W-90 100% Synthetic Gear Lube, AMSOIL SEVERE GEAR 75W-90 100% Synthetic Gear Lube, and AMSOIL SEVERE GEAR 75W-110 100% Synthetic Gear Lube provide advanced protection against wear, thermal runaway, and rust, extending the life of the drivetrain components.
Cooling and Brake System Maintenance
Proper cooling system maintenance is vital for the longevity of the VQ35HR engine. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant capacity for the 2009 Infiniti EX35 is approximately 9.1 quarts. This fluid is formulated with a unique poly-organic acid (OAT) technology, allowing it to be used in a wide variety of vehicles while protecting all cooling system metals, gaskets, and hoses. For those who prefer concentrated formulas, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant is another excellent option that requires mixing with distilled water. In terms of safety, the hydraulic AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid system requires a DOT 3 specification. This brake fluid offers excellent ABS and traction-control responsiveness with a stable viscosity across a wide temperature range. Power steering components also benefit from AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid, which helps seals remain soft to prevent leaks and offers strong anti-wear protection.
Seasonal Storage and Additional Protection
For owners who engage in seasonal driving or store the vehicle during inclement weather, specific additives and protectants can be highly beneficial. AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, protecting against varnish and gum buildup. For long-term storage, AMSOIL Engine Fogging Oil provides a highly effective rust preventive for internal components. To improve overall engine performance and fuel economy, the AMSOIL P.i. Performance Improver Gasoline Additive can restore up to 14% horsepower and clean GDI fuel injectors. For exterior maintenance, the AMSOIL Miracle Wash Waterless Wash and Wax Spray offers a protective finish without the need for water, while the AMSOIL Exterior Ceramic Spray provides rapid water shedding and UV protection.
About the Vehicle
The 2009 Infiniti EX35 represents a unique segment in the Infiniti lineup, bridging the gap between a sport sedan and a compact luxury SUV. Based on the M35 platform, the EX35 inherited the same sophisticated chassis dynamics and powertrain that made the sedan a favorite among enthusiasts. It is powered by the legendary 3.5-liter VQ35HR V6 engine, a nameplate that has powered Infiniti vehicles for over two decades with a reputation for reliability and smooth, linear power delivery. This engine produces substantial horsepower and torque, making the EX35 a surprisingly quick vehicle in a class that often prioritizes comfort over performance. The “HR” designation stands for High Revolution, indicating tweaks that allow the engine to rev more freely compared to earlier iterations of the VQ35. The interior design of the 2009 model year continues the Infiniti tradition of high-quality materials and driver-focused ergonomics, featuring soft-touch surfaces, intuitive controls, and a supportive seating position. The EX35’s crossover utility includes a versatile cargo area and optional rear-seat entertainment, making it a practical choice for families or individuals who refuse to compromise on driving dynamics. Its all-wheel-drive system, when equipped, provides excellent traction in various weather conditions, further enhancing its appeal as a year-round luxury performer. The vehicle’s market position as a premium entry-luxury sport crossover has earned it a dedicated following among drivers who appreciate a blend of style, utility, and spirited handling.