Origin of engine oil
Engine oil has a very important function in the car these days. Despite this, still many drivers do not have basic information on the subject and do not know exactly what engine oil should choose or just which oil is the best for his car.
Which oils are better then? It turns out that definitely synthetic oils. They provide much more efficient protection for moving engine components and cooling than mineral oils. The main advantage of synthetic oils is their low viscosity, thanks to which they are able to cover the exposed surfaces of the engine at low temperatures.
Speaking of viscosity, many drivers probably wondered about the meaning of the oil name, e.g. “10W-40”. This is called viscosity classification SAE, developed by the American Association of Automotive Engineers.
The first digits before the letter “W” are the low-temperature liquidity determination. In our Polish conditions, well as this number is small, it means that the ambient temperature at which the oil does not lose its lubricating properties may also be low. Oil with the symbols 0W, 5W 10W respectively contribute to the easy start-up of the drive unit and the smooth supply of grease to all nooks and crannies of the engine, even at very low temperatures.
The opposite is true for numbers after a hyphen. They mean viscosity at high temperature. And here a similar rule is applied – the larger the number, the higher the ambient temperature at which the oil should be used. Oils with symbols 40, 50 and 60 provide ideal engine lubrication at correspondingly higher atmospheric temperatures.
There is also a standardized quality classification of the oil. We will focus on this, developed by the European Association of Motor Manufacturers, i.e. ACEA classification. It divides motor oils into those intended for gasoline (S) and Diesel (C) engines. It consists of two letters; S or C and the second – the higher it is, the higher the quality of the oil. In relation to gasoline engines, therefore, we use SA, SB, SC, SD, SE, etc., and for high-pressure CA, CB, CC, CD, CE, etc.
So if we already know what the specifications of engine oils mean, we can start choosing the right oil. Generally, the rule should be one – follow the manufacturer’s recommendations. In the case of a car bought from a commission, it is still recommended to contact the car manufacturer directly. The Internet also offers help and you can find almost any information here.
A good habit is checking the oil level at approximately 1000 km, preferably at the occasion of refueling or before the trip. You can easily do it yourself, using the popular “bayonet”.