Contents: Viscosity classes of used motor oil ⇓ Specification of motor oils ⇓ Necessary classification of motor…⇓
A. Seasonal oils (not used); B. All-season oils; C. Synthetic oils.
Viscosity classes of used motor oil
| Ford Fiesta with petrol engines | SAE 5W30 |
| Ford Fiesta with diesel engines | SAE 10W40 |
| Mazda 121 (all models) | SAE 10W30 |
| Ford KA | SAE 10W30 |
Since the application areas of adjacent SAE classes overlap, short-term temperature fluctuations can be ignored. It is permissible to mix oils with different viscosity classes when adding oil, if the operating temperature range of the added oil corresponds to the viscosity class of the oil in the engine.
Specification of motor oils
The quality of motor oil is determined by the standards of the car and oil manufacturers.
Classification of motor oils of American companies is carried out according to the API system (API: American Petroleum Institute). The designation consists of two letters. The first letter indicates the area of application: 5 - Service, for gasoline engines; C - Commercial, for diesel engines. The second letter corresponds to the quality in alphabetical order. The highest quality according to API classification includes oils with the designations SH for gasoline and CF for diesel engines.
European manufacturers of motor oils also use the classification according to CCMS. In this case, the peculiarities of European engine production technologies are taken into account. Oils for gasoline engines are divided by quality in accordance with CCMS classes from G1 to G5; oils for diesel engines of passenger cars belong to the classification from CCMC-PD1 to CCMC-PD2.
The European Commission for CCMS introduced the ACEA (Association des Constructeurs Europeens de I'Automobile) classification, which defines further tests and quality levels. According to this classification, oils for gasoline engines of passenger cars belong to classes from ACEA A1-96 to AZ-96, oils for diesel engines - to classes from B1-96 to BZ-96.
Note: Motor oils recommended by manufacturers for diesel engines are not suitable for petrol engines. There are oils that are suitable for both petrol and diesel engines. In this case, both classifications are given (for example, CCMC-65/PD2 or API SH/CD).
Necessary classification of motor oils
| Ford Fiesta with petrol engines | ACEA A1-96/B1-96 or API SH |
| Ford Fiesta with diesel engines | ACEA AZ-96/VZ-96 or SSMS G5/PD2 and API-SH |
| Mazda 121 with petrol engines | API-SG/CD or API-SH/CD |
| Mazda 121 with diesel engines | ACEA BZ-96 or CCMS G5/PD2, API SH/CD, ACEA AZ-96 |
| Ford KA | API-SH and ACEA A1-96 or A2-96 or AZ-96 |