The 2015 Infiniti QX80 with the 5.6-liter V8 requires synthetic engine oil with a viscosity of 5W-30.
For the VK56DE engine used in this model, Infiniti recommends a full-synthetic 5W-30 oil to ensure proper lubrication across a wide temperature range. Capacity and exact specifications can vary with climate and driving conditions, so consult the owner’s manual or a dealer for confirmation specific to your vehicle.
Oil specification and compatibility
Below is the essential oil specification for this engine, including grade, performance standards, and typical capacity guidelines.
- Oil type: Full-synthetic engine oil.
- Viscosity: SAE 5W-30 is the standard recommendation for normal operation.
- Performance standards: API SN or higher and ILSAC GF-5 (or equivalent) are acceptable for this engine.
- Oil capacity: Approximately 7.5 to 8 quarts (with filter) for a complete oil change.
Choosing a synthetic oil that meets these standards helps protect the VK56DE engine under the heavy-duty conditions common to a large SUV like the QX80.
Viscosity guidance by climate
While 5W-30 is the baseline grade, some climates may warrant adjustments. In extremely cold environments, a manufacturer-approved alternative such as 0W-30 may be considered if specified by Infiniti for your region, and in very hot conditions a dealer could recommend a slightly higher-viscosity option (such as 5W-40) if noted in the manual or by a technician. Always verify with your manual or a licensed Infiniti technician before deviating from the standard 5W-30 recommendation.
Maintenance and practical tips
Practical guidance for maintaining the correct oil in your 2015 QX80 includes following recommended intervals and proper checking procedures.
- Oil change interval: Typical guidance ranges from 5,000 to 7,500 miles under normal use; towing, heavy loads, or frequent short trips may require shorter intervals.
- Oil level checks: Regularly check the dipstick when the engine is cool to ensure the level is between the min and max marks; top up with the same viscosity if needed.
- Filters and draining: Use the correct OEM or equivalent Infiniti-approved oil filter and tighten the drain plug to the specified torque to prevent leaks.
Adhering to these maintenance practices helps maximize engine longevity and performance for the QX80’s 5.6-liter V8.
Change interval considerations
Severe driving conditions—such as frequent towing, high-temperature environments, or extended idling—can necessitate more frequent oil changes. Always follow the service schedule provided by Nissan/Infiniti and adjust based on your driving patterns and local climate to maintain optimal engine protection.
Summary
The 2015 Infiniti QX80 5.6 takes synthetic 5W-30 engine oil, with an approximate capacity of 7.5 to 8 quarts for a full change. Use API SN or GF-5 certified full-synthetic oil, and consult your owner’s manual or a dealer for any climate-specific exceptions or updates to guidelines. Regularly monitor oil levels and adhere to recommended change intervals to keep the VK56DE engine performing at its best.