误解一：润滑油能多加就多加
Misunderstanding 1: add more lubricating oil if you can
润滑油量应该控制在机油尺的上、下刻度线之间为好。因为润滑油过多就会从气缸与活塞的间隙中窜入燃烧室燃烧形成积炭。这些积炭会提高发动机压缩比，增加产生爆震的倾向；积炭在汽缸内呈红热状态还容易引起早燃，如落入汽缸会加剧汽缸和活塞的磨损，还会加速污染润滑油。其次，润滑油过多增加了曲轴连杆的搅拌阻力，使燃油消耗加大。
The amount of lubricating oil should be controlled between the upper and lower marks of the oil dipstick. Because too much lubricating oil will jump into the combustion chamber from the gap between the cylinder and the piston to form carbon deposit. These deposits will increase the compression ratio of the engine and increase the tendency to produce knock; they are red hot in the cylinder and are easy to cause precombustion. If they fall into the cylinder, they will aggravate the wear of the cylinder and piston and accelerate the pollution of the lubricating oil. Secondly, too much lubricating oil increases the stirring resistance of crankshaft and connecting rod, which increases the fuel consumption.
误解二：什么时候润滑油变黑了就该换油了
Misunderstanding 2: when the lubricating oil turns black, it's time to change it
这种理解并不全 面。对于没有加清净分散剂的润滑油来说，颜色变黑的确是油品已严重变质的表现，但现代的润滑油，为改善其润滑性能都添加了适量的各种添加剂。加有清净分散剂的内燃机械润滑油在使用不久后变黑属正常现象，不能认为"油已变质"而轻易更换;加有添加剂的润滑油往往会使轴承表面在使用过程中变黑，这也属正常现象。因此，我们在确定润滑油是否已变质时，不能单凭视觉作判断，要进行综合分析。有条件时应对油料进行检测化验，做到按质换油。
This understanding is not comprehensive. For the lubricating oil without detergent dispersant, blackening is indeed a sign that the oil has seriously deteriorated. However, modern lubricating oil has added appropriate amount of additives to improve its lubricating performance. It is a normal phenomenon that the lubricating oil of internal combustion engine with detergent and dispersant will turn black soon after use. It is not easy to replace it because the oil has deteriorated. It is also a normal phenomenon that the lubricating oil with additive will turn black on the bearing surface during use. Therefore, when we determine whether the lubricating oil has deteriorated, we should make a comprehensive analysis instead of a visual judgment. If possible, the oil should be tested and the oil should be changed according to the quality.
误解三：润滑油经常添不用换
Misunderstanding 3: lubricating oil is often added without changing
经常检查润滑油是正确的，但只补充不更换只能弥补机油数量上的不足，却无法完全补偿润滑油性能的损失。润滑油在使用过程中，由于污染、氧化等原因质量会逐渐下降，同时还会有一些消耗，使数量减少。
It is correct to check the lubricating oil frequently, but only supplement without replacement can only make up for the lack of oil quantity, but can not fully compensate for the loss of lubricating oil performance. In the process of using lubricating oil, due to pollution, oxidation and other reasons, the quality will gradually decline, at the same time, there will be some consumption, so that the quantity will be reduced.
误解四：添加剂用处大
Misunderstanding 4: additives are useful
质优的润滑油是具备多种发动机保护功能的成品，配方中已含有多种添加剂，其中包括抗磨剂，而且润滑油非常讲究配方的均衡以保障各种性能的充分发挥。自行添加其他添加剂不仅不能给车辆带来额外保护，反而易与机油中的化学物质发生反应，造成机油综合性能的下降。
High quality lubricating oil is a product with a variety of engine protection functions. The formula already contains a variety of additives, including anti-wear agents. Moreover, the lubricating oil pays great attention to the balance of the formula to ensure the full play of various properties. Adding other additives can not bring extra protection to the vehicle, on the contrary, it is easy to react with the chemical substances in the engine oil, resulting in the decline of the overall performance of the engine oil.
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