The oil-fuel ratio is high. One Wheel Barrow Factory is diluted during the operation of the engine. In addition, two-stroke vehicles are mostly in the harsh working conditions of high speed, high power, and high thermal load, which can cause combustion chambers and exhaust ports. Increasing carbon deposits, spark plug pollution, large smoke exhaust, and low combustion octane number (the octane number of the fuel and engine oil mixture decreases with the increase in the amount of oil added), which can easily cause friction damage. According to other data, the temperature of the first ring groove of the piston of a two-stroke machine is as high as 295°C～315°C, so the high-temperature detergency of the oil is required to be good, while the temperature of the first ring groove of a four-stroke piston machine is only 245°C～270 °C, therefore, the requirement for high temperature detergency of four-stroke engine oil is relatively low. 5. When the two-stroke engine is idling, the oil flow is very small, and the lubricating oil is not easy to form low-temperature sludge, so the low-temperature detergency of the oil is not high, while the four-stroke engine requires the viscosity of the oil not to be too high at low temperatures to facilitate low-temperature starting Performance, so the low-temperature detergency of oil is relatively high. 6. Because two-stroke engine oil participates in combustion, its flash point is low, usually between 77°C and 88°C, while four-stroke engine oil does not directly participate in combustion for cyclic use, and its flash point is relatively high, generally at 204 °C～218°C. The quality grade and viscosity index of the oil Engine oil bottles are marked with their own specification index, such as API SF SAE 15W/40, "API SF" means that the oil is gasoline engine oil, the quality grade is F, and the applicable temperature is -15℃--40℃. The quality grade of engine oil follows the American Petroleum Institute (API) standard. Gasoline engine oil is represented by the prefix S, API SA, SB, SC..., SM. The lower the letter, the higher the quality level of the engine oil.
