For most 2015 Infiniti models, the recommended motor oil is full-synthetic with a viscosity around 5W-30, though some engines or driving conditions may call for a different grade such as 0W-20. The exact specification depends on your model and engine, so always check the owner's manual or the under-hood label for the precise requirement.
Oil recommendations by engine family
The 2015 Infiniti lineup includes several engines across sedans, SUVs and crossovers. While a common baseline is synthetic oil in the 5W-30 range, certain engines or climates may specify other viscosities. The information below reflects typical guidance, but always verify for your exact vehicle.
3.7L V6 (VQ37VHR) engines
Most 2015 Infiniti vehicles with the 3.7L V6 use full-synthetic oil with a viscosity of 5W-30. This specification is designed to balance protection and fuel efficiency across a wide range of temperatures. API SN or ILSAC GF-5 certifications are commonly supported by this engine family. Always confirm with your owner’s manual or service label.
3.5L V6 (VQ35DE) engines and related configurations
For models featuring the 3.5L V6, the typical recommendation is also a full-synthetic 5W-30, with the exact spec verified in the owner’s manual. Climate and vehicle configuration may influence the final grade, so use the manual or dealer guidance as the authority.
5.6L V8 (VK56DE) engines
Infiniti’s 5.6L V8 option in the 2015 lineup generally follows the same baseline: 5W-30 full synthetic is commonly specified, with certification and service data noted in manuals and labels. As with other engines, exact requirements can vary by model and market.
How to confirm the exact specification for your car
Because oil requirements can differ by model, engine and climate, use these steps to lock in the precise grade for your vehicle.
- Consult the owner’s manual for the official oil viscosity and specification (API SN or newer, ILSAC GF-5 or equivalent).
- Check the information label under the hood or on the oil filler cap for the recommended grade.
- Use your vehicle’s VIN on Infiniti’s official support site or contact a dealer service department to retrieve model-specific oil spec and capacity.
- When in doubt, choose a high-quality full-synthetic oil in the recommended viscosity and ensure it meets the indicated specification.
Following the exact specification for your model helps protect the engine and maintain warranty coverage. If you operate in very cold or very hot climates, the dealer or manual may approve an alternative viscosity within the same oil quality standard, but this should be confirmed before use.
Practical maintenance notes
Beyond selecting the correct oil grade, adhere to the maintenance schedule for oil changes as outlined by Infiniti. Synthetic oil typically allows longer intervals between changes than conventional oil, but driving conditions—such as frequent short trips, heavy city driving, or towing—may require more frequent service. Use a reputable filter and keep receipts or service logs for future reference.
Summary
The short answer is: the 2015 Infiniti oil type depends on engine and climate. Most 2015 Infiniti engines call for full-synthetic oil with a 5W-30 viscosity as the standard, but certain engines or driving conditions may require alternative grades (such as 0W-20). Always verify with the owner’s manual, the under-hood label, or a Infiniti dealer to ensure you meet the exact specification for your vehicle.