Vehicle Engine Oil PDF Print E-mail
Monday, 23 January 2017 16:12

Within the cultural season of Biology Department/College of Science, Dr. Zainab Abdul Zahrah Khudair, who she is a PhD degree holder speciality at Organic Chemistry /University of Baghdad, delivered the tilted lecture:

How to Choose the Oil of Vehicle Engine

On the main Hall of the Department.

Abstract:The engines oils play an important role in continuing the work of the engine process and in extending its period, just like the role of the blood in human beings. The good oils must have the following properties:

    - High oxidation constancy during burning inside the engine.

- keep the level of the oil in the required form during the operating process under hard conditions and they have the ability of quick pumping at low temperatures to ensure oiling all the parts of the engine completely they start operating process consequently, it is a protection from corrosion.

The process of producing engine oils included two basic levels:

1-     Filtering level and treating by productive units for crude oil where the produce of base oils has been conducted.

2-    Mixing level : adding some conditioners to the base oils at first level to raise their efficiency and to enhance their chemical & physical features to make them usable in different industrial fields in hard operational circumstances, and from that conditioners are (detergents, dispersants, inhibitors of oxidation, spillage degree, enhancing materials to improve the viscosity factor) by mixing these conditioners with the base oils in specific units designed for this process called Blending Units

The select of these oils depending on the performance (according to the American

Petrol Institute API) or viscosity according to (Society of Automotive Engineers SAE)

These motor oils are divided depending on API to:

1-    Oils that are used for motors operated by gasoline fuel symbolized by (s) API

2-    Oils that are used for motors operated by diesel fuel symbolized by (C) API

The classification of (SAE) contains 6 winter categories and 5 summer categories for the viscosity of engines oils.

The winter viscosity categories are: SAE 0w, 5w, 10w, 15w, 20w, and 25w

The summer categories are: SAE 20, 30, 40, 50, 60

It is important to note that not chaining the oil for a long time will reduce the virtual age of the engine and the formulation of the oil changes by heat so the oil would be less viscosity and this causes increasing in the rubbing and consequently the parts of the engine will corrosion because of rubbing as well as consuming the conditioners and remove their effect




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