Have enough oil film thickness of the relative sliding parts surface will be separated, so as to achieve the purpose of reducing by wear.
Oil has been a lot of car user known as a vocabulary,
did the oil is what is it used for? The label represent what mean? What car with what the most appropriate for oil? Today you are detailed editor for the tutorial:The oil role:The engine is the heart of the car, there were many engine friction between the movement metal surface, these components movement speed, the environment is poor, working temperature is up to 400 ° C to 600 ° C. In such bad condition below, only qualified lubricating oil to reduce engine parts wear and prolong service life, then qualified lubricating oil to meet which requirements? That is the big role is six oil.1, lubrication by grinding: between the piston and cylinder, main shaft and bush are there between the relative sliding fast, to prevent the wear parts too fast, the need for two sliding surface established between the oil film. Have enough oil film thickness of the relative sliding parts surface will be separated, so as to achieve the purpose of reducing wear.2, cooling cooling: oil to heat back to the fuel tank to send out to help in the air cooling water tank engine.3, cleaning cleaning: good oil to parts of the engine of carbide, sludge, wear the cycle metal particles back to fuel tank, through the flow of oil, flush the working plane parts from the dirt.4, seal leak: the oil can be formed between piston ring and piston a sealing ring, reduce gas leakage and prevent outside pollutants into.5, rust and corrosion prevention: oil can suck in parts surface prevent said water, air, acidity material and harmful gas with parts of the contact.6, for shock absorption: when the engine cylinder inlet pressure rose sharply, suddenly aggravate the piston, piston flocks, and crankshaft connecting rod on the load bearing is very big, the load bearing transfer after lubrication, the impact of a load under the function of the buffer.The oil classification:Currently on the market for its base oil of the oil can be divided into different Jane mineral oil and synthetic oils two (vegetable oil for yield rare so not plan). Synthetic oil and divided into: full and into and car DVD half synthesis. All synthetic oil is the highest level of.Both the biggest difference is that: the use of synthetic oil temperature and more use period is longer and higher costs; The same oil film requirements, synthetic oils can be used low viscosity can reach, and mineral oil will need relative to synthetic oils is strong viscosity to achieve such a request. In the same work environment, synthetic oil because use period than mineral oil grow a lot, so the cost is higher, but more oil after The Times, not how much higher than mineral oil.Oil for the label:Oil viscosity use more SAE level such as identification, SAE is English "American car engineer association" abbreviations. For example: SAE15W-40, SAE5W-40, "W" said winter (winter), the number of the smaller front that oil for the low temperature fluidity, the better for use on behalf of the environment temperature is lower, in cold start on the engine protection ability more good; "W" behind (a horizontal back) digital is resistant to high temperature of the index of oil, the greater the value that the oil under high temperature protection performance is better.The oil classification:"S" series beginning on behalf of gasoline engine oil, specification is: SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL. "C" beginning on behalf of the backup camera diesel engine oil series, specification is: CA, CB, CC, CD, CE, CF, CF-2, CF-4, CG-4, CH-4, CI-4. When the "S" and "C" two letters also exists, it says the oil for steam/universal wood.From "SA" has always been to "SL", each incrementing a letter, oil, performance will be better than the former, there will be more oil used to protect the engine additives. The letters on, the higher the quality level, international brand of more oil level is above the level of SF.
