The 2004Chevrolet Impala oil type and capacity iS5w30 and 4 quarts. Having high quality oil is important for the engine to run smoothly. You will run into issues with the oil at some point. Bad oil can cause the engine to stop working. A common problem is an awful burning smell. This needs to be inspected as soon as possible or the car might explode. Knocking noise may arise from the engine. You could experience poor gas mileage. Your oil needs to be replaced eventually. Every 5,000 to 10,000 miles is a good rule of thumb. If You don't replace it, there will be issues with the engine.
John A.
January 2, 2020
The 2004 Chevrolet Impala's base engine of the 3.4L V6 uses 4 quarts of 5W30 synthetic. The two versions of the larger 3.8L V6s that are optional on the Impala each need 4.5 quarts of 5W30 synthetic.
Flatheadfred
November 22, 2020
My impala 2004 3.8-k using oil switched to shell rotela 10w-30 t-4 has great detergent properties stopped oil usage before next oil change. I use 5 quarts in mine
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