Maintaining the performance of your 2012 Infiniti FX35 requires more than just following a basic maintenance schedule; it demands the use of high-quality lubricants designed to withstand the rigors of the 3.5L VQ35HR engine. Whether you are tackling city commutes, highway cruises, or the occasional spirited drive, the correct fluids ensure that critical components—from the engine and transmission to the differentials and brakes—operate smoothly and efficiently. Using fluids that meet or exceed original equipment specifications is essential for preserving the vehicle’s value and extending the life of its mechanical systems.
Recommended AMSOIL Products
Based on the specific requirements of the 2012 Infiniti FX35, we have compiled a selection of premium synthetic lubricants designed to provide superior protection and performance.
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Offers up to 25,000 miles of protection and superior resistance to heat and wear for the VQ35HR engine.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Provides 20,000 miles of protection with enhanced cleaning power to keep the engine running smoothly.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – A cost-effective solution that fights sludge and deposits, delivering performance comparable to OEM fill.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Formulated with a boosted detergent package to help engines with over 75,000 miles maintain performance.
- AMSOIL Oil Filter – Engineered for high efficiency, allowing lower restriction and providing greater capacity for small contaminants to reduce engine wear.
- WIX Oil Filter – Features premium media that offers improvements over original equipment manufacturer-branded filters.
- WIX Air Filter – Uses premium media to ensure clean air flows into the engine, optimizing combustion and efficiency.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Designed to withstand heavy towing, elevated temperatures, and challenging terrain while maintaining fluidity in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Protects against wear and promotes smooth, shudder-free shifts for the 7-speed automatic transmission.
- AMSOIL SEVERE GEAR 75W-90 100% Synthetic Gear Lube – Provides advanced protection against wear and thermal runaway for front and rear differentials.
- AMSOIL SEVERE GEAR 80W-90 100% Synthetic Gear Lube – A versatile option containing friction modifiers for limited-slip applications and long-lasting protection against rust and 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.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Reduces friction and helps seals remain soft to prevent leaks while offering strong anti-wear protection.
Why Synthetic Lubricants Matter for the FX35
The 2012 Infiniti FX35 is powered by the VQ35HR, a 3.5-liter naturally aspirated V6 engine known for its smooth power delivery and reliability. However, like any high-performance engine, it is susceptible to the effects of thermal breakdown, sludge formation, and component wear, especially under demanding conditions. Conventional mineral oils often lack the thermal stability to protect the engine during extended periods of operation or in extreme temperatures. This is where synthetic lubricants make a significant difference.
AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil and other AMSOIL synthetic motor oils are engineered with advanced base stocks and additive packages that outperform the highest industry standards. By using these formulations, you provide your engine with a stronger lubricating film that resists thinning at high temperatures and maintains viscosity in the cold. This ensures that critical components such as the pistons, bearings, and timing chain receive adequate protection throughout their service intervals. The 2012 FX35 requires 5.2 quarts of 5W-30 viscosity oil for a standard change, including the AMSOIL Oil Filter. Ensuring the correct oil capacity and flow rate is vital for maintaining optimal oil pressure and cooling efficiency within the engine block.
Transmission and Drivetrain Fluids
The drivetrain of the Infiniti FX35 includes a 7-speed automatic transmission (RE7R01A) that is integral to the vehicle’s handling and acceleration. This transmission is designed to operate under a wide range of loads, and the fluid must remain stable to ensure smooth gear shifts and prevent internal wear. AMSOIL recommends using a high-performance synthetic transmission fluid for this application to protect against sludge, wear, and the high temperatures generated during spirited driving or towing.
For the transmission, a total fill capacity is approximately 9.7 quarts. When filling, using fluids like the AMSOIL Signature Series Fuel-Efficient Automatic Transmission Fluid or the AMSOIL OE Fuel-Efficient Automatic Transmission Fluid offers distinct advantages. These formulations are designed to withstand the rigors of heavy towing and elevated temperatures while remaining fluid in sub-zero conditions. They also help reduce the operating temperatures of the transmission, which can extend the life of seals and clutches. In addition to the automatic transmission, the FX35 features a transfer case and front and rear differentials that require specific gear lubes. The front differential (F160A) and rear differential (R200) have varying capacities depending on the presence of a tow package. For these units, AMSOIL SEVERE GEAR 80W-90 100% Synthetic Gear Lube or SEVERE GEAR 75W-90 100% Synthetic Gear Lube provide excellent protection against wear, rust, and corrosion, ensuring reliable power delivery to the wheels.
Coolant and Brake System Maintenance
Proper temperature control is essential for the longevity of the VQ35HR engine. The cooling system requires a high-quality antifreeze and coolant that can protect against corrosion, cavitation, and freezing. The 2012 FX35 has a cooling system capacity of 9.7 quarts. AMSOIL offers both ethylene glycol-based and propylene glycol-based antifreezes that meet or exceed original equipment manufacturer requirements. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a unique poly-organic acid (OAT) formulation that is compatible with all other antifreeze colors and provides protection for up to 150,000 miles or 5 years.
For the braking system, maintaining the integrity of the AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is crucial for safety. The FX35 utilizes hydraulic brake fluid compatible with DOT 3 and DOT 4 standards. Over time, brake fluid can absorb moisture, leading to a lower boiling point and potential brake fade. Switching to this fluid improves the fluid’s thermal stability, ensuring consistent pedal feel and responsive ABS performance even under heavy braking. Additionally, the power steering system benefits from AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid, which reduces friction and helps prevent seal leaks, ensuring quiet and smooth steering operation.
Additional Protection and Maintenance Products
To keep the 2012 Infiniti FX35 in top condition, there are several additional products that enhance performance and protection. For fuel system maintenance, AMSOIL P.i.® Performance Improver Gasoline Additive can restore up to 14% horsepower and clean fuel injectors, which is particularly beneficial for engines with Gasoline Direct Injection (GDI) technology. It helps prevent carbon buildup and controls pre-ignition knock. For seasonal storage, AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, protecting against varnish and gum buildup, while AMSOIL Engine Fogging Oil protects internal engine components from rust during long periods of inactivity.
Filters play a critical role in maintaining engine health. The AMSOIL Oil Filter (EA15K12) provides filtering efficiency of 99 percent at 20 microns and allows for lower restriction, keeping engine parts lubricated. For air filtration, the WIX Air Filter (46044) offers improvements over OEM filters, ensuring the engine breathes easily. Cabin air filtration is also important for interior comfort and air quality; the WIX Cabin Air Filter (24479) uses premium media to trap dust and allergens effectively.
About the Vehicle
The 2012 Infiniti FX35 occupies a unique space in the luxury crossover market. It is a high-performance, four-door crossover SUV that was designed to bridge the gap between a sport sedan and a traditional utility vehicle. Built on the same platform as the Infiniti G35 and G37 coupes, the FX35 is renowned for its engaging driving dynamics and powerful acceleration. Under the hood sits the legendary Nissan VQ35HR engine, a 3.5-liter V6 that delivers around 300 horsepower, providing robust power for a vehicle of its size and weight.
Owners of the FX35 often appreciate its sporty handling, which includes a sophisticated all-wheel-drive system that can variably distribute torque to the rear wheels for optimal traction and stability. The exterior styling, characterized by its sleek roofline and aggressive stance, helped define the “coupe-like crossover” segment when the model was first introduced. The interior is generally well-appointed with premium materials, comfortable seating, and a focus on driver-centric controls. Whether used as a daily driver or a weekend performance toy, the FX35 is celebrated for its blend of utility, luxury, and driving pleasure, making it a favorite among enthusiasts who value both performance and practicality.