Can Fully Synthetic Engine Oils Be Mixed?

[VanZoe]

It is not recommended to mix them. Different types of engine oils should not be mixed either. This is because the additive components in oils from different manufacturers vary entirely, and the chemical compositions of these additives are not only different across brands but also cannot guarantee that mixing any two brands of oil will not cause chemical reactions under the high temperatures of an engine. However, it is certain that some combinations of oils will produce adverse reactions. Below is additional information: The potential harm to vehicles includes: Since the components of different oil types differ, mixing them can lead to the formation of flocculants in the oil, increasing its viscosity, among other issues. Unless you have a deep understanding of the oil's composition and content, it is strongly advised not to mix engine oils. Severe cases can result in the oil losing its lubricating effectiveness, leading to damage to internal engine components.