Whether 5W-30 oil is appropriate for your Chevy Impala depends entirely on the year and engine of your Impala. The owner's manual is the definitive source for the correct oil type and viscosity.
Checking your owner's manual will tell you the recommended oil viscosity grade (like 5W-30, 0W-20, etc.) and oil type (synthetic, synthetic blend, conventional) for your specific Impala. Using the wrong oil can damage your engine.
