* I am a large language model, not a mechanic. I don't have access to your specific ATV's maintenance records or the model year.
* Oil recommendations vary. The proper oil for your ATV depends on factors like:
* Engine type: Different engines (4-stroke vs. 2-stroke) require different types of oil.
* Model year: Arctic Cat's oil recommendations may have changed over time.
* Climate: Extreme temperatures might necessitate specific viscosity oil.
To find the correct oil for your Arctic Cat 400 quad, I highly recommend you:
1. Consult your owner's manual. This is the most reliable source for information about your specific ATV.
2. Check the Arctic Cat website. Their website likely has a section for owner resources and maintenance guides.
3. Contact an authorized Arctic Cat dealer. They can provide accurate and up-to-date advice.
Using the wrong type of oil can damage your engine, so it's crucial to use the recommended oil.