All-weather oils are used for AUDI engines. They have the advantage that they can be used in both winter and summer. All-season oils are based on seasonal oil (e.g. 15W). Thanks to the so-called thickeners, the oil is stabilized when hot, so that it has the appropriate lubricating properties under any operating condition. If all-weather oil is used, then it is necessary to use modern ones that have a high degree of viscosity (e.g. 15W-40, 15W-50).
Designation "W" in the SAE system indicates oil. applied in winter conditions.
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