The typical answer is that most 2019 Chevrolet gasoline engines use Dexos1 Gen 2 synthetic oil with a 0W-20 viscosity, but exact requirements vary by engine and model, so always check your owner's manual or the oil cap for the precise specification.
In detail, GM uses Dexos specifications to meet emissions and fuel-economy targets. Gasoline engines in the 2019 lineup generally call for Dexos1 Gen 2 oil with a 0W-20 viscosity, while diesel models such as Duramax-powered pickups commonly require Dexos2 oil with a 5W-40 viscosity. Because the 2019 Chevy range includes cars, trucks, and SUVs with different powertrains, some engines may have different requirements. Always verify for your exact vehicle.
To verify the exact oil you should use for your 2019 Chevy, you can follow these steps:
- Check the owner's manual or the vehicle’s information sheet for the precise oil specification and viscosity (look for Dexos1 Gen 2 and 0W-20, or the specified alternative).
- Inspect the oil filler cap on the engine; many caps display the required oil specification and viscosity.
- Identify your engine type and model; gasoline engines generally use Dexos1 Gen 2 0W-20, while Duramax diesels use Dexos2 5W-40.
- When in doubt, contact a Chevrolet dealer or GM Customer Care for the exact requirement for your VIN.
Confirming the correct oil specification helps maintain engine protection, fuel economy, and warranty coverage.
Notes on variations and maintenance
Gasoline vs Diesel engine oil requirements
Always use the recommended type and viscosity. If your owner’s manual allows multiple options (for example 0W-20 or 5W-30), choose the one specified for your engine variant and climate. Synthetic Dexos1 Gen 2 oils are commonly preferred for newer Chevrolet engines; conventional oils may be acceptable only if the manual explicitly allows them. Follow the recommended oil-change interval and use a quality OEM-approved filter.
Summary
Most 2019 Chevrolet gasoline engines require Dexos1 Gen 2 synthetic oil with a 0W-20 viscosity, while Duramax diesel engines require Dexos2 with a 5W-40 viscosity. Always verify via the owner’s manual or the oil cap, and consult a Chevrolet dealer if you’re unsure.