The oil you should use depends on the model year and engine. In general, modern Impalas require Dexos1 Gen 2 synthetic oil, typically 0W-20 or 5W-30, but the exact grade and viscosity vary by engine and climate. Always verify with the owner's manual or a Chevrolet dealer.
Oil requirements by era
To determine the correct oil for your specific Impala, identify the year and engine. Chevrolet standardized Dexos1 Gen 2 oil for many newer models, while older generations used a wider range of grades.
Modern Impalas (2014–2020)
These models typically require synthetic Dexos1 Gen 2 oil. The exact viscosity depends on the engine and climate, with 0W-20 and 5W-30 being common recommendations. Always confirm the precise grade in the owner's manual or with a Chevrolet dealer.
- 2.5L four-cylinder engine: Oil must meet Dexos1 Gen 2; viscosity is commonly 0W-20 or 5W-30 depending on climate and driving conditions.
- 3.6L V6 engine: Oil must meet Dexos1 Gen 2; viscosity is commonly 5W-30, but confirm the exact grade for your vehicle.
Conclusion: For modern Impalas, use Dexos1 Gen 2 synthetic oil and follow the grade specified for your engine and climate.
Older generations (pre-2014)
Oil specifications for older Impalas varied by engine and market. Many GM V6 and V8 engines used 5W-30 (conventional or synthetic blends), with some climates or engines allowing other grades. Check the owner’s manual or a GM service bulletin for the exact grade for your engine.
- General guidance: Many older engines used 5W-30, though some applications required different grades (such as 10W-30) depending on engine and climate. Dexos1 is not universally required on older models.
Conclusion: If you own an older Impala, verify the exact oil grade and spec for your engine from the manual or a dealer, as specifications varied by year and engine.
How to confirm the right oil for your Impala
Use these steps to ensure you’re using the correct oil and viscosity for your vehicle.
- Identify your model year and engine code from the glove box sticker or VIN/service records.
- Consult the owner's manual or official GM service information for the exact Dexos specification and viscosity.
- Choose a synthetic oil that meets Dexos1 Gen 2 for modern engines, and follow the viscosity recommended in your manual (often 0W-20 or 5W-30, depending on climate and engine).
- Select a reputable brand and follow the recommended change interval for your driving conditions.
Adhering to the official specification helps protect your engine and maintain warranty coverage.
Summary
The short answer is that it depends on your Impala’s year and engine. In general, modern Impalas use Dexos1 Gen 2 synthetic oil, with common viscosities of 0W-20 or 5W-30, while older models vary more widely. Always check the owner’s manual or consult a Chevrolet dealer to confirm the exact grade, viscosity, and change interval for your vehicle.