The 2015 Chevrolet Colorado uses Dexos1 Gen 2 motor oil, with the exact viscosity depending on the engine you have: 0W-20 for the 2.5L inline-4 and 5W-30 for the 3.6L V6. A diesel Duramax option was added later (2016) that uses Dexos2 5W-40. Always verify the specification in your owner's manual or on the under-hood label.
Engine options and oil requirements
2.5L inline-4 engine
Details for the 2.5L engine follow. This information helps you confirm the correct oil specification for routine maintenance.
- Oil specification: Dexos1 Gen 2 certified motor oil
- Recommended viscosity: 0W-20
- Oil type note: Synthetic or synthetic-blend oils that meet Dexos1 Gen 2 are acceptable
In short, use Dexos1 Gen 2 0W-20 high-quality oil for the 2.5L engine and ensure it meets the Dexos1 Gen 2 standard.
3.6L V6 engine
Details for the 3.6L engine follow. This section clarifies the oil choice for the V6 option available in the Colorado lineup.
- Oil specification: Dexos1 Gen 2 certified motor oil
- Recommended viscosity: 5W-30
- Oil type note: Synthetic or synthetic-blend oils that meet Dexos1 Gen 2 are acceptable
In short, use Dexos1 Gen 2 5W-30 high-quality oil for the 3.6L engine and ensure it meets the Dexos1 Gen 2 standard.
Duramax 2.8L diesel (introduced in 2016)
For completeness, the diesel option that arrived in late models uses a different spec. This section applies to those models equipped with the Duramax 2.8L diesel.
- Oil specification: Dexos2 certified motor oil
- Recommended viscosity: 5W-40
Note that the Dexos2 specification is specific to diesel engines; this Duramax option was not available in the 2015 model year but appeared in later Colorado versions.
Where to verify and maintenance considerations
Always double-check the exact requirement for your vehicle in the owner's manual or the under-hood engine oil information label. Oil-change intervals and capacities can vary by engine and market, and using the correct Dexos specification helps protect the engine and maintain warranty coverage. When in doubt, consult a GM dealership or a trusted mechanic who can confirm the right oil for your exact trim and engine.
Summary
The 2015 Chevy Colorado generally requires Dexos1 Gen 2 oil: 0W-20 for the 2.5L I-4 and 5W-30 for the 3.6L V6. A diesel Duramax option (introduced in 2016) uses Dexos2 oil at 5W-40. Always verify your specific engine’s requirements in the owner’s manual or on the under-hood label, and use high-quality synthetic oil that meets the appropriate Dexos specification.