The G25’s oil grade depends on the exact model and year. In most cases, it uses synthetic engine oil in the 0W-20 to 5W-30 range. Always verify the precise specification in the owner's manual or on the oil filler cap.
Beyond the short answer, the G25 name has appeared on a few different vehicles in various markets, most notably a 2.5-liter Infiniti/Nissan sedan from the early 2010s. Because engines, climates, and regional specifications vary, the recommended oil can differ by engine code and market.
What is the G25?
The G25 title has signified several 2.5-liter four-cylinder variants used in different markets, often tied to Infiniti/Nissan sedans. The exact oil requirement is tied to the engine code, generation, and regional specifications, so the same model name can have slightly different oil recommendations.
Why engine code matters
Engine codes determine the manufacturer's recommended viscosity and specification (for example, ILSAC GF-5 or GF-6 endorsements and whether 0W-20 or 5W-30 is preferred). Identify the precise engine code in your owner's manual or on the under-hood label to ensure you use the correct oil.
Oil recommendations by engine and year
The following guidance covers common scenarios for G25 models in many markets. Always align with your owner's manual because specifications can vary by engine and region.
- 0W-20 synthetic oil (ILSAC GF-5 or GF-6): Common for newer G25 engines in regions prioritizing fuel economy; suitable for a broad climate range.
- 5W-30 synthetic oil: Widely used for many 2.5-liter Nissan/Infiniti four-cylinders, especially in the US and for older variants; provides robust protection across seasons.
- 5W-40 synthetic oil: Used in hot climates or under higher load in some variants; verify compatibility with your engine code.
- Conventional 5W-30 (only if the manual explicitly allows it): Some older or region-specific versions may permit conventional oil, but synthetic is generally preferred for longevity and efficiency.
Conclusion: The correct oil grade depends on your G25’s engine code, year, and climate. If in doubt, consult the owner's manual or a dealership service advisor, and use the specified oil quality (typically API/SN and ILSAC GF-5 or GF-6) and the recommended viscosity.
How to confirm the exact oil for your G25
Steps:
- Find your engine code (often visible on the engine block or in the vehicle’s manual).
- Check the maintenance schedule or the oil-cap label for the exact viscosity and specification.
- Contact a Nissan/Infiniti dealer or a trusted mechanic with your VIN for the precise recommendation.
Summary
The G25’s oil type isn’t universal; it hinges on the model year, engine code, and market. Most versions use synthetic oil in the 0W-20 to 5W-30 range with GF-5 or GF-6 specifications. Always verify with the owner's manual or dealer and adhere to recommended change intervals to keep the engine performing well.