In short, use a Dexos1 Gen 2 certified motor oil that matches your engine’s required viscosity for your model year—commonly 0W-20 or 5W-30—and confirm the exact specification in the owner’s manual or GM’s official lubricant guidance.
The Impala has spanned several generations with different engines and maintenance specs, so the exact oil you should use can vary. This article explains how to identify the right oil for your specific Impala and offers practical guidance on shopping and changing it.
Know your engine and year
To pick the right oil, start with your model year and engine. The owner's manual lists the exact viscosity and Dexos specification. If you can't locate the manual, check the under-hood label or the driver’s door jamb sticker for the oil specification, or use GM's VIN-based lubricant finder online or by contacting a Chevrolet dealer.
Important note about variations
Over the years the Impala used several engines and sometimes multiple oil specs exist within a generation, so verifying the exact requirement for your VIN is safest.
Find the right oil specification
Most modern GM engines used in Impalas require a Dexos specification. The two most common viscosity choices are 0W-20 and 5W-30. The exact requirement depends on engine and climate; Dexos1 Gen 2 is the current standard for many engines built from 2011 onward, but older Dexos1 Gen 1 or other approvals may apply to older models.
Common oil choices for Impala engines (high level):
- Dexos1 Gen 2 (or Dexos1) certified oil is required by many GM gasoline engines; verify the exact specification for your year.
- Viscosities typically listed as 0W-20 or 5W-30; climate and engine type determine which to use.
- Conventional, synthetic-blend, and full synthetic oils are available; synthetic options offer better protection and longer change intervals; some older engines may tolerate conventional oil but may require more frequent changes.
Conclusion: Always confirm the oil specification and viscosity in your owner's manual or GM's online resources to ensure you meet the required standard.
Practical shopping and changing guidelines
Use this checklist to shop for oil and complete the change correctly, minimizing harm to the engine and keeping warranty coverage intact.
- Find the exact oil specification (Dexos requirement) and the preferred viscosity for your engine and climate from the manual or GM's online tool.
- Purchase a high-quality oil that meets that Dexos specification; choose 0W-20 or 5W-30 as directed, and select synthetic-blend or full synthetic if you want longer drain intervals.
- Buy a compatible oil filter; use OEM or reputable aftermarket options.
- During the change, drain old oil completely, replace the filter, and refill with the correct oil quantity (capacity specified in the manual or on the dipstick).
- Run the engine, check for leaks, and recheck the oil level with the dipstick; reset the oil-life monitor if equipped.
Conclusion: A careful oil choice and a proper change protect the engine, maintain efficiency, and help avoid warranty issues.
Where to find authoritative guidance
Consult the owner's manual, GM's official lubricant requirements resources, and your Chevrolet dealer or trusted service provider. If you have a VIN handy, GM's site can confirm the exact Dexos specification and viscosity required for your particular vehicle.
Summary
The right oil for a Chevy Impala depends on the model year and engine. Most modern Impalas require Dexos1 Gen 2-certified oil, with viscosity typically 0W-20 or 5W-30; synthetic or synthetic-blend formulations are commonly recommended. Always verify the exact specification in the owner's manual or via GM's official resources, and perform regular oil changes using the correct oil and filter.