When it comes to car oil, we're sure it's no stranger. It's a better lubricating engine, making the engine more superior, like human blood, to every organ of the body, but it turns out that even old drivers may not understand it, and my friends around me always ask me what it means to have the label on the oil pack. Do you think your own car could be full of synthetic oil? What is the lifetime of ordinary oil? Wait for similar questions. Let's talk about car oil next。
I'm sorry
What is car oil, and what it does
The oil is called lubricating oil, and if the engine compares to the heart, the oil is the car's blood, the key to the lubricating engine, and it affects the engine's performance and useful life。
Oil determines engine performance and life
What oil does it do
Lubrication: when the vehicle is activated, there is a rapid relative friction between the piston and the gas cylinder, between the main axle and the axle, and between the right gears, and the oils form a oil membrane on two friction surfaces, thereby reducing friction。
Cleaning: the oil flows through circulation, enabling it to bring back to the oil floor for the purpose of cleaning, such dirty things as carbon, oil sludge, metal friction scrap attached to the engine。
Sealed leaks: the oils can form oil membranes between parts of relative motion to increase their sealability and help prevent leakages or spills。
Refrigeration cooling: the oil can bring back some of the heat from the engine to the tank and then spread it into the air, helping the engine cool down。
(a) seismic buffer: when the engine is activated, the pressure of the gas tank mouth rises sharply and suddenly increases the load on the pistons, pistons, poles and curved bearings, which is smoothed through the bearings, absorbs the shock and reduces the vibration and acts as a buffer。
What kind of oil
The oils in the current market can be divided into mineral oils and synthetic oils, depending on the base oils, which can be divided into semi-synthetic oils and fully synthetic oils。
All synthetic oil, semi-synthetic oil and mineral oil
Mineral oils are based on petroleum-refined mineral oils and are manufactured with additives. Prices can provide a general protective effect at a lower price, and minerals oils are essentially available for less than $150 on the market。
Mineral oil
Semi-synthetic oil, between ore oils and synthetic oils, with a large addition of synthetic oil additives based on mineral oils, can provide better lubrication clean-up and more affordable prices and provide better protection for ordinary cars。
Semi-synthetic oil
Full-synthetic oil, which is entirely synthetic, is fundamentally differentiated from mineral-made oil, which provides excellent lubricants for engines, with a high and low temperature, high-speed lubrication, usually used in high-end cars, racing cars, and in extreme weather, which are priced several times as much as mineral oil。
Full synthetic oil
What's the name of the oil
We've seen the sae, api, sm, 5w-40s on the usual oil packaging, so let's see what they mean。
Sae logo
Meaning of sae: sae is an acronym for the english `american association of motor engineers', with the sae behind the label indicating the viscosity value of oil, such as sae5w-40, in which w represents winter in winter, while the smaller the figure before w represents movement visceral viscosity at low temperatures, the lower the figure indicates that oil is very hot and mobile, and the higher the number, the higher it is at 100 degrees。
Api logo
Meaning of the api logo: api is the acronym of the american petroleum association in english, and the label behind the api indicates the quality of the oil。
Api oils are divided into three categories:
The “s” initial series, which represents petrol engine oil, is defined as: api sa, sb, sc, sd, se, sf, sg, sh, sj, sl, sm, sn。
The “c” initial series, which represents diesel motor oil, is defined as api ca, cb, cc, cd, ce, cf, cf-2, cf-4, cg-4, ch-4, ci-4。
3. When the letters "s" and "c" exist simultaneously, this means that the oil is of a common type for firewood。
The letters after s or c mean from “sa” to “sn”, and every letter that is added to the letter, the oil is more environmentally friendly than the previous one, and the higher the letter, most of the oil in the international brand is above sf, the most environmentally friendly oil is currently sn。
There are three types of oil: full-synthetic oil, semi-synthetic oil and mineral oil, which acts as a lubricating and cleaning engine, sealing leaks, cooling cooling temperatures, and seismic buffers。
