The viscosity of oil products will change with the temperature change, such as the high temperature in the summer environment, the engine is often in the high temperature working state, it is easy to cause the early oxidation deterioration and the viscosity of the lubricating oil, thus losing the lubrication function. Therefore, experts suggest that in summer, oil with slightly higher oil viscosity should be selected as far as possible. For example, the "Super Sticky king" series, which is introduced by Jiucheng lube oil, increases the internal friction of liquid and increases the shearing resistance of the oil because of its super viscosity formula, so it can form good oil film between piston, cylinder wall and camshaft, so that the viscosity of the oil is stable under the condition of high temperature of the environment. Reduce the wear of engine parts. At the same time, pay special attention to checking oil dipstick regularly in summer. If there is a defect, it should be replenished in time. The cold weather in winter, the poor fluidity of fuel, the increase of viscosity of lubricating oil, so we should choose a low viscosity lubricating oil.