The quality of HD oil is indicated by the API system (API — American Petroleum Institute). The designation consists of two letters, the first letter indicates the application: S = Service, suitable for gasoline engines; C = Commercial, suitable for diesel engines. The second letter indicates the quality in alphabetical order. The highest quality oil according to API - SG specifications for gasoline engines and CD for diesel engines.
Attention: CD-engine oils, marked by the manufacturer as oils for diesel engines only, are not suitable for gasoline engines. There are oils that are suitable for both gasoline and diesel engines. In this case, both designations are applied, for example, SF / CD.
VW has approved its own oil standards. In general, it is necessary to use oils that meet these standards. These rules are on the packaging. Gasoline engines require oils that operate under high power conditions, both VW - norms 50000 and 50500 comply with them. Easy-flowing oil VW - norms 50000 or multigrade oil VW - norms 50101 VW multigrade oil - norms 50101 can also be filled in as a rule cheaper if under there is no oil of this specification on hand, you can temporarily use seasonal oil of the API-SF specification.
The diesel engine is allowed to be operated with multigrade or seasonal oil of API-CD specification or high power oil approved for turbodiesel. Multigrade oil that complies with VW 50500 can also be used.
In a turbodiesel engine, oils designed for high power operation and at the same time meeting the VW 50500 standard can be used. All other oils are not suitable for a turbodiesel.
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