The 2022 Infiniti QX80 is a substantial full-size luxury SUV powered by the robust 5.6-liter VK56VD V8 engine. To maintain peak performance and ensure long-term reliability, owners must use fluids specifically designed to meet the rigorous demands of this powerful powertrain. The manufacturer requires synthetic motor oil, a specification that synthetic technology is uniquely qualified to exceed. Proper lubrication reduces wear on critical components, manages the heat generated by the heavy-duty engine, and protects against the sludge and deposits that can accumulate over time. By selecting the correct viscosity and quality for this specific application, owners can optimize fuel economy, reduce emissions, and maximize the service intervals between maintenance visits.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – The ultimate choice for the 5.6L engine, offering up to 25,000 miles of protection and superior resistance against horsepower loss and wear in extreme conditions.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – An excellent alternative for extended drain intervals up to 20,000 miles, providing superior cleaning power to keep the VK56VD engine running smoothly.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – A cost-effective 100% synthetic option that fights sludge and deposits, delivering performance that outperforms conventional oils in protecting the turbochargers.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Specifically formulated for vehicles with over 75,000 miles, this oil boosts detergent levels and reduces sludge to help extend engine life.
- AMSOIL Oil Filter – Provides high-efficiency filtration (99% at 20 microns) and greater capacity for contaminants compared to competing filters, ensuring clean oil flow for the engine.
- WIX Oil Filter – A premium aftermarket filter option featuring advanced media that offers improvements over standard OEM-branded filters for this vehicle.
When performing an oil change, the 2022 Infiniti QX80 with the 5.6L engine requires 6.9 quarts of oil when the filter is replaced. It is crucial to torque the oil drain plug to between 22 and 29 ft/lbs and install a new washer on the drain bolt to prevent leaks. Always check the oil level after refilling to ensure the correct quantity is used.
Coolant and Transmission Protection
Beyond the engine, the cooling system and transmission of the QX80 require specialized fluids to handle heavy loads and temperature variations. The cooling system capacity is 16 quarts. For this application, AMSOIL offers the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant, a 50/50 pre-mix formulation that protects all cooling system metals and lasts up to 150,000 miles. For owners who prefer to mix their own coolant, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant provides a concentrated solution that greatly surpasses standards for metallic corrosion.
The transmission is another critical component that benefits from synthetic fluids. The 2022 QX80 features a 7-speed automatic transmission (RE7R01B) that requires a total fill of 10.6 quarts. Standard automatic transmission fluids can break down under the stress of towing and heavy hauling. AMSOIL recommends the AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid to withstand severe temperatures and provide reserve protection during heavy use. Alternatively, the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid offers robust wear protection for everyday driving conditions.
Drivetrain and Braking Fluids
The rear differential of the Infiniti QX80 requires a synthetic gear lube. The capacity is 3.8 pints, and the application calls for GL-5 rated lubricants. AMSOIL provides AMSOIL SEVERE GEAR 75W-90 100% Synthetic Gear Lube which controls thermal runaway and helps reduce operating temperatures while protecting limited-slip differentials. For those seeking extended service intervals, the AMSOIL 75W-90 Long Life 100% Synthetic Gear Lube is designed for a 500,000-mile service life. The heavy-duty AMSOIL SEVERE GEAR 75W-110 100% Synthetic Gear Lube is also available for applications requiring higher viscosity ratings.
For the braking system, AMSOIL offers AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid. This fluid ensures excellent ABS and traction-control responsiveness while maintaining a stable viscosity across a wide temperature range. Additionally, the power steering system can benefit from AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid, which helps seals remain soft to prevent leaks and resists heat for long fluid life.
Seasonal and Fuel Care
To maintain peak fuel economy and engine health, fuel additives play a significant role. The AMSOIL P.i. Performance Improver Gasoline Additive is highly effective at restoring fuel injectors to 100% flow rate and can restore up to 14% of lost horsepower. For owners who frequently store their vehicle, AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, protecting against varnish and gum buildup. Also, engine fogging oil can be used for storage protection.
Vehicle Background
The Infiniti QX80 is a flagship full-size SUV that represents the luxury division of Nissan. First introduced as the QX56 and later renamed the QX80, this vehicle has long been a staple in the luxury segment for buyers who require maximum towing capacity without sacrificing comfort. The 2022 model continues this legacy with its massive footprint and commanding presence on the road. It is powered by the naturally aspirated 5.6-liter VK56VD V8 engine, a robust powerplant known for its smooth delivery of power and high torque output. This engine is a workhorse, designed to handle the weight of the large body frame while providing the necessary power for towing trailers, boats, or other recreational equipment.
As a body-on-frame SUV, the QX80 shares its platform with the Nissan Armada, providing a solid foundation for off-road capability while delivering a ride quality comparable to unibody luxury vehicles. The interior is typically well-appointed with high-quality materials, making it a favorite for families and individuals who prioritize space and luxury. The vehicle is known for its quiet cabin and advanced technology features, including a comprehensive infotainment system and driver-assistance aids that enhance safety.
Despite its reliability, the 5.6L VK56VD engine has a few known issues that owners should be aware of. One common problem involves oil consumption, where the engine may burn oil more frequently than expected due to piston ring issues or valve stem seal degradation over time. Using a high-quality synthetic oil like AMSOIL can help mitigate this by providing better sealing properties and cleaning power to keep rings free of carbon deposits. Another potential issue is turbocharger coking, particularly in turbocharged variants or when using oil that does not meet the latest performance standards, though the 5.6L is naturally aspirated, the principle of keeping oil clean remains vital for all engine longevity. A third issue often reported is premature wear on timing chain components, which can sometimes be linked to oil starvation or degraded lubrication during cold starts. AMSOIL’s superior cold-flow properties ensure rapid lubrication to critical components immediately upon startup. Finally, owners may experience issues with transmission shift quality or hesitation, which can be improved by using a synthetic transmission fluid that resists thermal breakdown and maintains consistent friction characteristics over a longer service interval.
By addressing these specific areas with the correct synthetic lubricants, owners can ensure their Infiniti QX80 remains a reliable and comfortable companion for years to come, regardless of the driving conditions or mileage accumulation.