In order to be in line with international standards, China's internal combustion engine oil viscosity grade classification also directly adopts this internationally accepted classification method. China's existing GB498 classification method has been invalidated accordingly. The viscosity of the internal combustion engine oil used to make it easy to drive the car in different seasons or in different regions can be well adapted without having to change the oil, and more importantly, in order to reduce the low-temperature viscosity of the internal combustion engine oil and reduce the car's starting temperature at low temperatures. The mechanical friction and wear, while conducive to energy saving and prolong engine life. At present, the world's vehicle engine oil has been widely used multi-grade oil (or thickened oil), its viscosity characteristics can be used to meet the viscosity requirements across a variety of different viscosity levels, such as 10W/30, 15W/40 and so on. This multi-grade oil is formulated from a lower viscosity base oil and a viscosity index improver (x). The reason why multi-grade oil is good for energy saving and reducing wear is obvious. As the car starts at a low temperature, the viscosity of a single-stage oil is generally large, that is, the internal frictional resistance of the oil is large, and therefore it is difficult to be quickly pumped to be lubricated. The parts, so that these parts in a relatively long period of time in the dry friction or boundary lubrication state, so that the friction resistance on the one hand, so that when the car starts to use more than the same time the fuel consumption than normal fuel consumption, the other On the one hand, the mechanical wear is also greater. Low Temperature Cross Linked Shrink Film Low Temperature Cross Linked Shrink Film ,Pe Shrink Film,Shrink Wrap Paper,Eco Friendly Shrink Wrap Guangdong Xiangmei Film Co.,Ltd , https://www.xiangmeipacking.com