What kind of oil does Chevy recommend?
Dexos standards and what they mean
Chevrolet’s lubricant guidance centers on Dexos certifications, which ensure compatibility with GM engines and emissions systems. The two main categories are Dexos1 Gen 2 for gasoline engines and Dexos2 for diesel engines. Use only oils that carry the appropriate Dexos certification and follow the viscosity listed in your manual.
- Dexos1 Gen 2: Most Chevrolet gasoline engines require this certification. It ensures protection and performance for modern engines and emissions systems.
- Dexos2: Diesel-powered Chevrolets, including many Duramax models, typically require Dexos2 oil.
- Viscosity guidance: Common choices include 0W-20 or 5W-30 for gasoline engines, with climate and engine design determining the exact grade. Diesel engines often specify a 5W-40 or similar grade; check the manual.
- Oil type guidance: Most modern Chevy engines prefer synthetic or synthetic-blend oil; conventional oils are less commonly acceptable where Dexos specs are required.
Conclusion: Always ensure the oil you buy bears the right Dexos specification and viscosity for your engine; when in doubt, consult a Chevy dealer or the official owner resources.
Guidance by engine type
Before applying lists, this section explains the guidance by engine family so you can apply the right oil to your Chevy model.
Gasoline engines (passenger cars and light trucks)
For most Chevrolet gasoline engines, use Dexos1 Gen 2 certified oil with a viscosity recommended in the owner's manual. Synthetic or synthetic-blend oils are generally preferred for modern engines.
- Dexos1 Gen 2 is required for most gasoline engines.
- Common viscosities: 0W-20 or 5W-30, chosen based on engine specifications and climate.
- Use synthetic or synthetic-blend oil; conventional oils are typically not recommended for Dexos1 Gen 2 engines.
- Check the oil cap, owner’s manual, or Chevrolet’s official resources for the exact grade and certification.
Conclusion: For gasoline Chevrolets, follow the Dexos1 Gen 2 specification and the viscosity indicated in your manual.
Diesel engines
Chevrolet diesel models, including many Duramax engines, usually require Dexos2-certified oil and often a higher-performance synthetic grade. See your manual for the exact grade.
- Dexos2 certification is typically required for diesel engines.
- Common diesel viscosities: 5W-40, with variations by engine and climate.
- Synthetic oils are commonly recommended for diesel engines due to higher temperature and load conditions.
Conclusion: Diesel Chevrolets rely on Dexos2 oil; verify the exact viscosity in the owner's manual.
Regional and climate considerations
Climate can influence the recommended viscosity. In colder regions, manufacturers often specify thinner grades, while hot climates may require thicker grades to maintain film strength.
- Cold climates: 0W-20 or 0W-30 may be recommended to ensure cold-start protection.
- Moderate to hot climates: 5W-30 or 5W-40 may be advised for better high-temperature protection.
- Severe driving conditions or extended service intervals: In some cases, a higher-grade synthetic oil is advised; always follow the manual.
Conclusion: Use the viscosity specified by your manual for your climate and driving conditions; Dexos certification remains essential.
How to verify the correct oil for your Chevy
To ensure you’re using the right oil, perform these checks.
- Locate the owner's manual or the vehicle’s information in the glove box for the exact Dexos spec and viscosity.
- Look at the oil cap and engine oil fill label; some models print the required grade and Dexos specification on the cap.
- When in doubt, ask a Chevrolet dealer or certified technician to confirm the correct oil.
Conclusion: Always verify Dexos specification and viscosity to preserve engine protection and warranty coverage.
Summary
Chevrolet’s oil guidance centers on using oils that meet Dexos specifications—primarily Dexos1 Gen 2 for gasoline engines and Dexos2 for diesels—with viscosities chosen to match engine design and climate. The exact grade and certification can vary by model and year, so always check the owner’s manual, the oil fill cap, or consult a Chevy dealer to ensure you’re using the correct oil for your vehicle.
