What oil goes in a Colorado?
The correct oil for a Colorado depends on the engine. For gasoline engines, use Dexos1 Gen 2 synthetic oil with a viscosity your engine requires (commonly 0W-20 or 5W-30). For the Duramax 2.8L diesel, use Dexos2 synthetic oil, typically 5W-40. Always check the owner's manual or the oil filler cap for the exact specification for your model and year.
The Chevrolet Colorado has evolved through multiple generations, adding and updating engines such as the 2.5-liter inline-four, a 3.6-liter V6, and the 2.8-liter Duramax diesel. Oil specifications vary by engine and by model year, and following the wrong specification can affect performance or warranty coverage. This article lays out the engine-by-engine oil recommendations, how to interpret Dexos certifications, and practical tips for keeping the engine healthy.
Engine options and oil recommendations
Gasoline engines
Below are the typical recommendations for gasoline-powered Colorado engines. Verify the exact specification for your year and engine configuration in the owner’s manual or on the oil cap.
- 2.5L inline-four (gasoline): Use a Dexos1 Gen 2 synthetic oil. Typical viscosities offered are 0W-20 or 5W-30 depending on the model year.
- 3.6L V6 (gasoline): Use Dexos1 Gen 2 synthetic oil, commonly 5W-30. Check your year’s specification to confirm viscosity.
Oil compatibility and viscosity can vary by year, so always confirm the exact spec for your vehicle.
Duramax diesel
Diesel engines require different oil specifications. The Duramax 2.8L in the Colorado uses Dexos2-certified synthetic oil, typically 5W-40, with climate-dependent variations possible (e.g., 0W-40 in very cold conditions). Always verify the precise viscosity for your year and climate in the manual.
- Duramax 2.8L diesel: Dexos2 synthetic oil, commonly 5W-40; consult the manual for climate-specific guidance (0W-40 may be acceptable in certain regions).
Bottom line for engines: gasoline engines use Dexos1 Gen 2 (0W-20 or 5W-30 depending on year), while the diesel uses Dexos2 (typically 5W-40). Always verify the exact spec for your vehicle.
Oil change intervals and maintenance tips
Oil-change intervals depend on engine type, oil formulation, driving conditions, and model year. General guidelines follow synthetic vs. conventional recommendations, but severe service can shorten intervals. Use the owner's manual as the definitive source.
- Gasoline engines (2.5L, 3.6L): With Dexos1 Gen 2 synthetic oil, a common interval is about 7,500 miles (12 months), whichever comes first. With conventional oil, intervals are typically shorter (around 5,000 miles or 6 months).
- Duramax 2.8L diesel: With Dexos2 synthetic oil, intervals are commonly around 7,500 miles (12 months), but towing, heavy payload, dusty conditions, or extreme temperatures may require more frequent changes. Always follow the manual for your use case.
Edge cases and severe-duty use may necessitate more frequent changes. If you drive aggressively, tow often, or operate in extreme heat or dust, consider shortening the interval and staying vigilant for oil-condition signs.
Choosing an oil brand and certification
Key to compatibility is selecting Dexos-certified oil. Dexos1 Gen 2 is for GM gasoline engines; Dexos2 is for GM diesel engines and some other applications. Many major brands offer Dexos-certified products, but always confirm the exact Dexos designation on the bottle.
- Gasoline engines: Dexos1 Gen 2-certified synthetic oils (often available in 0W-20 or 5W-30 viscosities).
- Diesel engines: Dexos2-certified synthetic oils (commonly 5W-40; climate-based variations may apply).
- Popular brands that frequently offer Dexos-certified oils include Mobil 1, Castrol, Pennzoil, Valvoline, and Motul; verify the bottle’s label before purchasing.
Bottom line: Use a Dexos-certified synthetic oil appropriate for your Colorado’s engine, and choose a reputable brand that explicitly lists Dexos1 Gen 2 (gasoline) or Dexos2 (diesel) on the label.
Summary
The Colorado’s oil needs depend on the engine. Gasoline versions (2.5L I-4 and 3.6L V6) typically require Dexos1 Gen 2 synthetic oil with a viscosity specified by year (commonly 0W-20 or 5W-30). The 2.8L Duramax diesel requires Dexos2 synthetic oil, typically around 5W-40, with climate-dependent variations. Always consult the owner’s manual or the oil cap for the exact spec and consult your dealer if in doubt. Use Dexos-certified oils from reputable brands and follow the recommended change intervals for your driving conditions to protect the engine and preserve warranty.
