What kind of engine oil should be used for the Buick Excelle?

1 Answers
McJuliana
07/30/25 2:54am
For the Buick Excelle, the recommended engine oil is the GM genuine 5W-30SL. Here are some important considerations regarding engine oil: 1. Gasoline engine oil should not be used as a substitute for diesel engine oil, primarily to avoid accelerating wear in diesel engines. Since there are differences in the application of gasoline and diesel engine oils, substitution is only permissible if the manufacturer provides instructions for such use or if the oil is labeled as suitable for both gasoline and diesel engines, or if it falls within the specified grade range. 2. Single-grade and multi-grade oils should not be mixed. 3. Different brands of the same type of oil can be temporarily mixed, but long-term mixing should be avoided. However, it is important to note that oils of different brands and specifications should never be mixed. This is because different oils contain varying additive compositions, and mixing them can easily lead to the formation of sediments, which are detrimental to engine lubrication. 4. When using engine oil, it is essential to regularly check both the quality and the quantity of the oil in use. The crankcase must have sufficient oil to ensure the engine operates in a proper lubrication state.
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