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The 2018 Chevrolet Impala requires 5w-20 oil and holds up to 5 quarts. Using high-quality oil is essential for optimal engine performance. Eventually, issues may arise with the oil, such as engine knocking noises or a burning smell. Neglecting oil maintenance can lead to serious consequences, even causing the engine to fail. It's important to have your oil checked regularly, ideally every 5,000 to 10,000 miles, to prevent any problems with the engine.
In the 2018 Chevrolet Impala, the recommended oil is synthetic engine oil with a viscosity rating of SAE 5W-20. The 2.5L 4-cylinder engine requires 5 quarts of oil along with a new filter, while the 3.6L V6 engine needs 6 quarts of oil including the filter.
I prefer to use Acdelco dexos 5w30 for my V6 LT model.
Five quarts of 5W30 oil.