The key factors in selecting motor oil:
1. API Oil Factor
The American Petroleum Institute (API) indicator indicates the quality of the engine oil.
This indicator is represented by two English letters, the first one indicating gasoline or diesel, and the second letter indicates the type of engine oil quality.
The old indexes are SA / SB / SC / SD / SE / SF, which have low quality motor oils, and it can be said that the use of these motor oils in today’s vehicles is completely outdated. Today, more than motor oils with SJ / SL / SM / SN are used.
It is worth mentioning that it is better to use motor oils with a higher quality index for your motor vehicle. At present, the highest quality engine oil produced by SN is.
2. SAE Factor (Motor Oil Concentration)
One of the important factors in selecting the engine oil is the viscosity (concentration) of the engine oil. That is, the engine oil concentration should be as high as possible to achieve the best performance, depending on the type of engine and the weather conditions. This factor, indicated by the letter W, is placed on the engine oil as follows:
SAE: 10W-40, 05W-40, 05W-30, 10W-30, 20W-50, 0W-20
This is because the W-number represents the viscosity of the oil at a low temperature (winter season), the smaller the number is, the oil is thinner, and in the winter the oil needs to be diluted to work well, because if it is concentrated, oil is hardly between The components of the engine are circulating and damage to the engine and internal components of the engine. For example, 0W-20 / 0W-30 / 0W-40 / 5W-30 / 5W-40 oils are more suitable for cold cities.
The next dimension W represents the viscosity of the oil at a higher temperature (summer season), the larger the number is, the thicker the oil.
For example, if the oil is diluted, it will lose its efficiency in the southern cities of the country. So, we need to use high-performance motor oils. For example, motor oils 15W-50 / 20W-50 / 10W-40 / 10W-50 are more suitable for tropical cities.
3. Engine oil base
Engine oils are divided into three types based on the type of motor oil base:
• Mineral motor oil
• Semi Synthetic Motor Oil
• Synthetic or synthetic motor oil (Full Synthetic)