These additives provide better protection against corrosion, increase resistance to oxidation, to the formation of turbidity in the engine crankcase, improve viscosity properties, and have cleaning and dissolving properties. Additives for cleaning and dissolving not only reduce the formation of carbon deposits in the engine, but also have the ability to dissolve carbon deposits and, together with other contaminants, dismember them into tiny particles and maintain them in a suspended state, so that when changing the oil, they drain together with the oil.
HD oil quality is given in the API system (API: American Petroleum Institut). The designation is given by two letters. The first letter indicates the area of application: S = service, suitable for petrol engines; C = commercial, suitable for diesel engines. The second letter indicates the quality in alphabetical order. The highest quality in the API system are oils of the SG specification for gasoline internal combustion engines and CD for diesel engines.
Attention! CD motor oils, designated by the manufacturer as oils for diesel engines only, are not suitable for petrol engines. There are oils that are suitable for both petrol and diesel engines. In this case, both specifications are indicated on the packaging (for example: SG/CD).
VW AG has set its own oil standards for VW models. Oils that comply with these standards must be used. If in doubt, you can inquire about approved oils from your sales representative.
Gasoline engines require heavy-duty oils that meet both VW 50000 and 50500 standards. VW-50000-standard easy-flow oils or VW-50101-standard all-season oils can also be used. VW-50101-standard all-season oils are generally more expensive. If you do not have this specification on hand, you can temporarily use API-SG-specification single-grade or all-season oil.
Diesel engines can use motor oils of the VW 50101, VW 50500, API-CD specifications or VW 50000 easy-flowing oils.
(The information is available on the website: www.VWMANUAL.ru)
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