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Motor oil is used to lubricate combustion engines in the cylinder area and the rest of the engine block. But not all engine oil is the same. The oils have special properties, which in turn relate to both the performance of the respective machine and the ambient temperature. The oils are roughly divided into so-called single-grade oils and multi-grade oils. These two terms refer to the viscosity of the oils, although multi-grade oils that are suitable for summer and winter operation are predominantly used today. If you are not sure which engine oil you need, then use our Lubricantadvisor