Should the Malibu use 5W40 or 5W30 engine oil?

1 Answers
DelCarson
07/30/25 10:21am
Both can be used. Here is some information about the Malibu's engine oil: 1. Advantages of engine oil: 5W-30 has relatively better fluidity, which more effectively reduces fuel consumption and allows the engine to dissipate heat faster and more efficiently. Under high-temperature conditions, 5W-40 offers better oil stability. 2. Other factors: The viscosity (density) of engine oil affects fuel economy and operability in cold weather (engine starting and oil flow capability). Lower-viscosity engine oil can make the engine more fuel-efficient and perform better in cold weather, while higher-viscosity engine oil is more suitable for extremely hot weather, providing satisfactory lubrication.
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