What motor oil does Chevy use?
Most modern Chevrolet gasoline engines use Dexos1 Gen 2 oils, with 0W-20 being the typical viscosity. Diesel engines like the Duramax use DexosD oils, which may require different viscosities. Always verify the exact specification and viscosity in your owner’s manual for your model year and engine configuration.
Understanding Dexos and Chevy's oil standards
GM created the Dexos specification family to standardize lubrication across its lineup, improve engine protection, and simplify oil choices for service outlets. Dexos1 Gen 2 covers most gasoline engines, Dexos1 Gen 1 applies to older gasoline engines, and DexosD is the standard for GM diesel engines such as the Duramax. Some regions or specific engines may reference different Dexos variants, so always confirm for your vehicle.
Dexos1 Gen 2 vs DexosD
Gasoline engines in most 2016-and-newer Chevys require Dexos1 Gen 2-approved oils, with 0W-20 being the common viscosity for many engines. Diesel engines in the lineup, including Duramax models, use DexosD oils designed for diesel operation, and the viscosity depends on the specific Duramax engine and climate. Always refer to the owner’s manual for the exact spec and grade.
Gasoline engines: typical oil specifications
Here are the key points owners should know about oil for Chevy gasoline engines.
- Most current Chevy gasoline engines require Dexos1 Gen 2 oil that meets GM's specification.
- 0W-20 is the most common viscosity for new engines, balancing performance and efficiency.
- Some older or engine-specific models may require Dexos1 Gen 1 or different viscosities (such as 5W-30), depending on the model year and climate.
- High-quality synthetic or synthetic-blend oils that meet Dexos1 Gen 2 approval are typically recommended for optimal protection and longer intervals.
In short, for gasoline Chevys, Dexos1 Gen 2 oils in 0W-20 are the standard starting point, with variations specified by the exact engine and region.
Diesel engines (Duramax): what to use
Diesel engines in Chevrolet vehicles—the Duramax line—use DexosD oils. The exact viscosity depends on the Duramax model, climate, and usage. Always refer to the owner's manual for the recommended grade.
- Duramax engines require DexosD oils, not Dexos1 Gen 2.
- Common diesel viscosities include 5W-40 as a baseline, with other grades used in different models and conditions.
- Use oils that meet DexosD specification from reputable brands to ensure proper wear protection and soot control.
Diesel oil choices should align with your Duramax model and expected operating conditions to maintain engine longevity.
How to choose and change Chevy oil correctly
Follow these practical steps to ensure you’re using the right oil for your Chevy and keeping your engine healthy.
- Always check the owner’s manual or GM service data for your exact Dexos spec and viscosity recommendation.
- Look for engine oil that explicitly meets Dexos1 Gen 2 (gasoline) or DexosD (diesel) approvals on the bottle.
- Prefer synthetic or synthetic-blend options that meet the Dexos specification, unless a conventional oil is permitted by your manual.
- Consider climate and driving conditions; some regions or severe-use scenarios may justify a different viscosity within the Dexos spec.
Bottom line: pick an oil that carries the Dexos certification for your engine, and use the viscosity and type recommended by Chevrolet for your model year.
Quick references by era and notes
General guidance by era helps owners verify what to expect, but always confirm with the manual.
- 2016 and newer gasoline Chevys: Dexos1 Gen 2, commonly 0W-20.
- Older gasoline Chevys (before 2016): may require Dexos1 Gen 1 or other Dexos grades and viscosities.
- Diesel Duramax engines: DexosD; check exact viscosity per model.
Owners should rely on the official documentation for their specific vehicle to avoid misapplication of oil.
Summary
Chevrolet aligns its gasoline engine lubrication with Dexos1 Gen 2 requirements, most often using 0W-20 synthetic oil. Diesel Duramax engines use DexosD oils with viscosities determined by the model and climate. Always consult the owner’s manual or GM’s service data, and choose a high-quality oil that bears the appropriate Dexos certification.
Conclusion
Getting the oil right is essential for Chevrolet engines. Dexos certification ensures compatibility and protection across the lineup. Regular oil changes with the correct oil type help preserve performance and longevity.
