News

If the engine is the heart of our car, then the engine oil… is the blood of this heart. The engine oil circulates within the engine, providing protection for various moving parts and undertaking important functions such as lubrication, cooling, cleaning, buffering, and sealing.
The condition of the engine oil directly affects the working state of the engine and also influences its lifespan. Therefore, engine oil is extremely important for our cars, but there are many doubts about it.

… Uncle Cha… listed several common questions asked by car owners and helped answer some questions about engine oil.
Why do I need to change the engine oil? Can I skip it?
Everyone knows how important engine oil is to the engine. Although new cars usually have full oil tanks, the working environment of the oil is very harsh: impurities produced by gasoline combustion are also polluting the oil. Over time, the oil… oxidizes and deteriorates, and it also gradually evaporates and becomes less in use, thus losing its lubrication and protection for the engine, causing engine damage.
Therefore, car owners must regularly check, replenish, and replace the engine oil.
What’s the difference between fully synthetic oil and mineral oil?
To answer this question, Uncle Cha needs to first explain the composition of engine oil. Engine oil is composed of 75%-90% base oil and 10%-25% additives.
The difference between fully synthetic oil and mineral oil… is that the base oil is different. Mineral oil is derived from petroleum. Fully synthetic is obtained through chemical methods, breaking down and synthesizing various chemical raw materials.
The result… is that the base oil of mineral oil is… a mixture of different sizes and a disorderly arrangement. For example… it’s like a group of people of different heights and body types walking on the street.
Fully synthetic oil is a synthetic product, with uniform molecular size and orderly arrangement… it’s like an army formation with uniform body shapes and coordinated steps during a military parade.
Fully synthetic oil has stable properties, is less prone to evaporation, less prone to oxidation and deterioration, and has good durability. Moreover, it provides better lubrication for the engine. However, its disadvantage… is that it is expensive.
Mineral oil has average durability, is prone to oxidation and deterioration, and is not suitable for high-performance engines that require high compression power. However, its advantage… is that it is cheaper.
The price difference between fully synthetic and mineral oil is several times. How should I choose?
The selection of both types of oil depends on the car and the person:
If your car has weak power, outdated engine technology, and is used mainly for transportation and daily commuting, and you follow the schedule for maintenance, use mineral oil for your car… OK.
If your car’s engine is turbocharged, equipped with advanced technologies, and generates a lot of power, and you drive the car in an aggressive style frequently, it is recommended that you use fully synthetic engine oil.
What do these numbers and letters mean?
These numbers and letters were invented by the Society of Automotive Engineers (SAE) to represent the viscosity of engine oil.
If the oil tank only has 5W, 10W, and 15W oils, they are only suitable for low temperatures. The W stands for Winter, and the smaller the number before W, the lower the low-temperature viscosity and the better the low-temperature fluidity.
If the oil tank only has 30, 40, and 50 oils, they are only suitable for high-temperature areas, and the larger the number, the higher the high-temperature viscosity and the better the lubrication effect at 100°C.
To make the engine oil usable in both winter and summer, most of the engine oils on the market are multi-viscosity oils that are suitable for both low and high temperatures. The viscosity is expressed by two sets of numbers such as 5W-30 or 0W-20.
Most car manufacturers will provide one type of engine oil for a specific car. Of course, this is a compromise solution considering more factors (performance, fuel consumption, cost, etc.) and catering to the majority of users. Owners can, of course, choose the oil that is more suitable for their car based on their region and driving habits.
For those in the north where winters are long and cold, before the onset of winter, owners can choose the oil with a smaller number before W (such as 0W-20, 0W-16, etc.). This way, when the engine starts cold in low temperatures, the lubrication protection provided by the engine oil will be better.