The recommended oil type for a 2005 Chevrolet Malibu depends on the engine it has. There were several engine options available that year. To know for sure, you need to check your owner's manual. It will specify the correct viscosity (like 5W-30 or 10W-30) and the type of oil (conventional, synthetic blend, or full synthetic).
However, generally speaking, a 2005 Chevrolet Malibu likely used 5W-30 oil. But again, always consult your owner's manual for the definitive answer. Using the wrong oil can damage your engine.
