The label on the oil bottle represents the viscosity of the oil. The label is "10W-50", and "w" stands for winter. The smaller the number before "W", the better the low-temperature fluidity of engine oil, that is, the lower the available ambient temperature, the better the engine protection ability during cold start.
0W engine oil means that it can withstand -35℃, 5W is -30℃, 10W is -25℃ and 15W is -20℃, so the choice of engine oil in winter depends on the temperature in your area.
The number after "W" (a horizontal back) is the index of high temperature resistance of oil. The larger the number, the better the protective performance of oil at high temperature. It is suggested that vehicles with high calorific value, such as Harley and other large-displacement air coolers and heavy vehicles, use 10W-50 engine oil with higher calorific value in winter, which is helpful to better lubricate the engine.
Extended data:
Motorcycle oil type:
1, mineral oil
Mineral oil is the lowest cost base oil, almost all of which is composed of hydrocarbons. At low temperature, it has poor fluidity, high volatility, and low viscosity index. Although mineral oil seems to have many shortcomings, if it is only for the need of commuting, with the appropriate oil change opportunity, the economical price will be a very good choice.
2. Fully synthetic oil
In a narrow sense, synthetic oil must be formed by polymerization of small molecular units, and most synthetic oils are formed by cracking crude oil or natural gas with some hydrocarbons as the main raw materials. Compared with mineral oil, it has better lubrication effect and quality stability, not only has better low-temperature fluidity, but also has better oxidation resistance, low volatility and corrosion resistance, but its relative price is higher.
3. Semisynthetic oil
The main component is mineral oil mixed with the most common synthetic hydrocarbon "poly-1- olefin" (PAO). The contents of "mineral oil" and "PAO" in semi-synthetic oil are not defined in detail in industry standards, so there are also semi-synthetic oils composed of 95% mineral oil and 5% PAO in engine oil. At this time, the effect is very different.
Baidu encyclopedia-motorcycle engine oil