Maintaining your 2016 Infiniti QX50 with the 3.7L VQ37VHR B engine requires more than just following a standard maintenance schedule; it demands specific fluid capacities and performance-grade lubricants designed for this specific powertrain. Proper lubrication is the cornerstone of long-term vehicle health, ensuring that every moving component from the pistons to the gears operates with maximum efficiency and minimal friction. For this vehicle, which features a 7-speed automatic transmission and a complex cooling system, using the wrong fluid viscosity or grade can lead to reduced fuel economy, premature wear, and costly repairs.
Recommended AMSOIL Products
- AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil – Offers the highest level of protection for the VQ37VHR engine, delivering up to 25,000 miles of coverage with superior resistance to heat and wear.
- AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil – Provides a robust balance of performance and value, offering 20,000 miles of protection with excellent cleaning properties to prevent sludge buildup.
- AMSOIL OE 5W-30 100% Synthetic Motor Oil – Formulated to meet OE specifications while providing the added benefits of synthetic technology, including 12,000 miles of guaranteed protection.
- AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil – Specifically engineered for vehicles with over 75,000 miles, featuring enhanced detergents and anti-wear additives to rejuvenate older engines.
- AMSOIL Oil Filter – Delivers 99% filtration efficiency at 20 microns to capture contaminants that can cause engine wear, ensuring clean oil circulation.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Ensures smooth shifts and protects the 7-speed RE7R01A transmission from sludge, heat, and heavy towing loads.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Provides OE-equivalent performance with advanced anti-wear protection for long transmission life.
- AMSOIL SEVERE GEAR® 80W-90 100% Synthetic Gear Lube – Ideal for front and rear differentials, offering extreme pressure protection and rust inhibition for GL-5 applications.
- AMSOIL SEVERE GEAR® 75W-90 100% Synthetic Gear Lube – A versatile heavy-duty gear lube that controls thermal runaway and protects against wear in demanding conditions.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A 50/50 pre-mix formulation that protects the cooling system metals and hoses for up to 150,000 miles or 5 years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated, non-toxic alternative that offers superior corrosion protection and extended service intervals.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Ensures responsive braking and stability in ABS systems with a high boiling point and wide temperature range.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Reduces friction and protects seals to prevent leaks while ensuring quiet operation in your steering system.
- AMSOIL P.i.® Performance Improver Gasoline Additive – Restores up to 14% horsepower and cleans GDI injectors, improving fuel economy and overall engine performance.
The engine in your Infiniti QX50 is the heart of the vehicle, but without the correct viscosity and additive package, its longevity is compromised. For the 3.7L VQ37VHR B engine, the oil capacity is 5.2 quarts when the filter is replaced. After adding the oil, it is crucial to check the level to ensure accuracy. The drain plug requires a torque of 25 ft/lbs, and a new washer should always be installed to prevent leaks. AMSOIL offers a range of synthetic options to suit your driving habits, from high-mileage formulations for aging engines to the Signature Series for those seeking maximum protection.
Beyond the engine, the cooling system plays a vital role in maintaining performance. The 2016 QX50 holds 9.1 quarts of antifreeze and coolant. Whether you choose the convenient 50/50 pre-mix or the concentrated propylene glycol version, proper cooling fluid prevents corrosion and overheating, extending the life of the radiator, water pump, and hoses. The transmission, a 7-speed RE7R01A, requires a total fill of 9.7 quarts. Using a synthetic transmission fluid designed for modern automatic transmissions ensures that the vehicle shifts smoothly and handles heavy loads without slippage or heat buildup.
Differential and transfer case lubrication is often overlooked but essential for four-wheel-drive performance. The transfer case holds 2.1 pints and requires a drain plug torque of 26 ft/lbs. For the front and rear differentials, the vehicle specifies GL-5 lubricants. The front differential holds 1.4 pints, while the rear holds 3 pints. AMSOIL SEVERE GEAR synthetic gear lubes are designed to withstand the extreme pressures and high temperatures found in these components, protecting against wear and rust.
Braking and steering systems also require specific fluids to operate safely. The hydraulic brake system utilizes DOT 3 fluid, for which AMSOIL’s synthetic DOT 3 and DOT 4 brake fluid provides superior boiling points and consistent performance. The power steering system benefits from a high-quality synthetic fluid that resists heat and keeps seals soft to prevent leaks, ensuring the steering remains responsive throughout the vehicle’s life.
Why Proper Lubrication Matters for This Vehicle
Using the correct fluids is not merely a suggestion; it is a necessity for the 2016 Infiniti QX50. The VQ37VHR engine is a high-performance powerplant that generates significant heat and stress. Conventional oils may break down under these conditions, leading to sludge formation and accelerated wear. Synthetic motor oils, by contrast, provide a molecularly uniform protection that resists oxidation and thermal breakdown. This is particularly important for the QX50, which is often driven in varying conditions that can range from stop-and-go city traffic to highway cruising.
The transmission fluid in the QX50 must be capable of handling the friction of multiple gears and clutches. A breakdown in the transmission fluid can lead to delayed shifts, shuddering, and eventual transmission failure, which is a costly repair. AMSOIL transmission fluids are formulated to maintain their viscosity and lubricity over long periods, reducing the frequency of fluid changes while offering superior protection compared to conventional fluids.
Fuel additives also play a significant role in maintaining engine efficiency. Over time, carbon deposits can build up on fuel injectors and intake valves, leading to reduced power and poor fuel economy. The use of a high-quality fuel additive like AMSOIL P.i. can clean these components, restoring the engine’s performance and efficiency. This proactive approach to maintenance can save money in the long run by preventing costly repairs and keeping the vehicle running as it did when it was new.
Vehicle Background
The 2016 Infiniti QX50 represents a significant milestone in the brand’s history as the fifth-generation iteration of the QX50 series. Originally launched as a crossover SUV that combined the utility of a truck with the comfort of a luxury sedan, the QX50 has long been a favorite among those seeking a versatile vehicle for family life and personal driving pleasure. The model is built on the Nissan D platform, sharing its engineering foundation with the Nissan Rogue but receiving Infiniti’s signature luxury upgrades, refined suspension tuning, and premium interior appointments.
Under the hood, the 2016 QX50 is powered by the robust 3.7-liter VQ37VHR V6 engine. This powerplant is renowned for its smooth power delivery and impressive reliability, a hallmark of Infiniti’s VQ engine family. The engine produces a healthy amount of horsepower and torque, making the QX50 a capable performer on the road and on the trail. The vehicle is equipped with a 7-speed automatic transmission with overdrive and 4-wheel drive capabilities, offering a balanced driving experience that prioritizes both on-road comfort and off-road capability.
The QX50 is known for its refined ride quality, thanks to its advanced suspension system that absorbs road imperfections while maintaining body control during cornering. Inside, the cabin features high-quality materials, intuitive controls, and ample space for passengers and cargo. The 2016 model year continues to offer a blend of luxury and practicality, making it a popular choice for drivers who need a vehicle that can handle daily commutes as well as weekend adventures. With its reputation for reliability and its powerful engine, the QX50 remains a standout in the luxury crossover segment.
Seasonal and Additional Maintenance Products
For owners who store their vehicles seasonally or operate them under extreme conditions, specific products can further enhance protection. AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, preventing varnish and gum buildup that can clog fuel systems during long storage periods. Similarly, Engine Fogging Oil provides excellent rust prevention for internal components during extended periods of inactivity, making it ideal for equipment or vehicles that are not driven regularly.
For vehicle maintenance beyond the powertrain, AMSOIL offers a range of specialized products. The Heavy-Duty Metal Protector sprays onto metal surfaces to provide a long-lasting, wax-like barrier against salt, moisture, and corrosion, making it useful for undercoating or protecting exposed metal parts. The Heavy-Duty Degreaser is a professional-strength formula that quickly dissolves oil, tar, and grime, making it perfect for cleaning engine bays or mechanical components. Additionally, the P.i. Performance Improver not only cleans fuel injectors but also helps prevent carbon rap in direct injection engines, ensuring optimal performance and fuel efficiency.
Finally, for vehicle care and detailing, products like the Miracle Wash Waterless Wash and Wax Spray offer a convenient way to clean and protect the exterior without water, leaving a fantastic shine and UV protection. The Brake and Parts Cleaner effectively removes contaminants from brake components, helping eliminate squeal and chatter. By utilizing a comprehensive range of AMSOIL products, owners can ensure their 2016 Infiniti QX50 receives the care it deserves, maximizing its performance, safety, and resale value.
About the Vehicle
The 2016 Infiniti QX50 is a mid-size luxury crossover SUV that sits comfortably between the entry-level EX and the flagship QX80 in Infiniti’s lineup. Built on the D platform, which it shares with the Nissan Rogue, the QX50 offers a unique blend of driving dynamics and practical utility. The vehicle is powered by a 3.7-liter VQ37VHR V6 engine, which delivers smooth and responsive power, a characteristic that has become synonymous with the Infiniti brand. This engine is known for its durability and ability to perform well under a variety of driving conditions.
The QX50 is designed for drivers who value a premium driving experience without sacrificing practicality. The interior is crafted with high-quality materials, featuring leather upholstery, a sophisticated infotainment system, and advanced safety technologies. The 7-speed automatic transmission, paired with the 3.7L engine, provides seamless gear changes and contributes to the vehicle’s smooth acceleration. The available 4-wheel drive system allows the QX50 to handle inclement weather and light off-road conditions with confidence.
In terms of market positioning, the 2016 QX50 appeals to a demographic that seeks a balance between luxury and functionality. It is an ideal choice for families who need a spacious and comfortable vehicle but also want the performance and handling characteristics of a sports car. The vehicle’s reputation for reliability, combined with its refined design and powerful engine, makes it a strong contender in the competitive luxury crossover segment. Owners of the QX50 appreciate its versatility, which allows them to enjoy the open road with confidence and comfort.
Regular maintenance is essential to keep the QX50 running at its best. By using the recommended AMSOIL synthetic lubricants and fluids, owners can extend the life of their vehicle and ensure that it continues to perform reliably for years to come. From the engine oil to the gear lube, every fluid in the QX50 plays a critical role in its overall health and performance. Investing in high-quality synthetic lubricants is a smart decision for any QX50 owner who wants to protect their investment and maintain the vehicle’s peak performance.