Car Maintenance and Repair

It is reported that the replacement engine common owners Engine oil When you select only the high-grade oil, it seems that the higher the price the more expensive grade of oil the better. Many owners mistakenly added because high-grade oil, leading to the phenomenon of increased carbon deposition. In response, experts said, the current Market Grade level on the lower oil price basically G 80 -90 element, while the grade level higher oil prices SL 130 yuan -140 yuan.

Car features a number of riders do not understand that the higher the price for the car plus the more expensive grade of oil the better. Stubbornly choose a higher level of oil will not necessarily strengthen the engine protection. Especially for the engine behind some of the more old, the high-grade oil will make oil consumption to increase, resulting in carbon deposition.

Oil not just to wear Oil for the engine just as the blood is as important for the heart. Automobile engine is the heart of many mutual friction within the engine’s metal surface movement, fast movement of these components, environment is poor, the working temperature of up to 400 to 600 . Surface in such bad condition that only qualified oil can reduce engine wear and tear parts, extended service life.

Between piston and cylinder, main shaft and bearings are there between the relatively fast moving, to prevent excessive wear and tear parts, you need between the two sliding surfaces the establishment of film. There is sufficient oil film thickness will be separated by relative sliding of the part surface, so as to achieve the purpose of reducing wear and tear. Heat the oil can be re-circulated back to the sump tank to help cool the air in the engine. Good oil on the engine parts can be carbon, sludge, wear metal particles through the loop back to the sump, the flow through the oil, wash the surface of parts produced by the work of dirt. Oil can be formed between the piston and a piston ring to reduce gas leakage and to prevent pollutants from entering the outside world.

Oil to the surface of Absorption in part to prevent water, air, acidic substances and harmful gas and the contact parts. When the engine cylinder pressure of rapid population increase, a sudden increase piston, piston chip, connecting rod and crankshaft bearings on the load, the load passes through the bearing lubrication to withstand the impact load to play the role of a buffer.

Is the best fit Oil on the market today because the different base oils can be simply divided into two kinds of mineral oil and synthetic oil.

Synthetic oil in divided into: total synthesis and semi-synthetic. Synthetic oil is the highest level. The greatest difference is between the two: the temperature of synthetic oil use wider, longer lifespan, and cost more; the same film requirements, low viscosity synthetic oil can be used to reach, and mineral oil compared to synthetic oil on Xu Yong stronger sense of viscosity can be achieved for this requirement. In the same work environment, synthetic oil since the use of period much longer than mineral oil, so higher costs, but more after the oil change frequency is not much higher than the mineral oil.

Different grades of oil have different characteristics, its low temperature starting and high temperature anti-wear, adhesion also have different performance. Oil viscosity and temperature inverse relationship, when the engine cold, the oil viscosity higher than the viscous oil, if selected, would be to start the motor, battery and other additional wear and tear; if oil had thin, high temperature work is difficult enough under the protective film formation caused by insufficient lubrication, resulting in increased mechanical wear.

SAE lubricant viscosity and other multi-level identity to use. For example: SAE15W-40, SAE5W-40, “W” that winter (winter), the smaller the number of instructions in front of the oil the better low temperature fluidity, representing the availability of lower ambient temperature in the engine when cold start the better the protection capacity; “W” back (a cross behind) is the number of oil temperature indicator, shows the greater value the protection of oil at high temperature the better the performance.