换油对于您的汽车的寿命和性能至关重要，并为发动机部件磨损和过量热量提供了最大的保护。机油以粘度为单位，即油的厚度。过去，汽车的油使用术语“重量”（例如10重30级油）来定义与今天粘度一词含义相同的东西。
在引入合成机油之前，车主不得不依靠仅具有一种粘度的油制剂。这有助于缓解与冬季较冷的月份和夏季温暖的月份之间厚度差异相关的问题。万博亚洲客户端力学使用了轻质油，例如10重量的天气。在一年中温暖的月份中，30或40重的油阻止了油在增加的热量中破裂。
多种咨询机油通过提供更好的流动油来解决此问题，当天气变冷而温度升高时也变厚时，它仍然稀薄。这种油为全年的车辆提供了相同水平的保护。因此，不，车主不需要在炎热或寒冷的天气中更换机油。
How multiviscosity oil works
Multiviscocity oils represent some of the best motor oil for cars, because it provides protection for engines in a variety of different temperatures. The multiviscosity oil uses special additives, called viscosity improvers, that expand as the oil heats up. This expansion helps provide the viscosity needed at higher temperatures.
Once the oil cools down, the viscosity improvers shrink. This ability to adapt the viscosity to the temperature of the oil makes multiviscosity oils more effective compared to older motor oils, which vehicle owners had to change out according to the season and temperature.
Signs that you need to change your motor oil
MOBIL 1机油，尤其是Mobil 1高级全合成机油，持续更长的时间，并有助于保护发动机免受沉积和泄漏，无论温度如何。无论其寿命如何，车辆中的机油最终都需要更换。寻找车辆机油需要更换以保护发动机的迹象，包括：
An engine running louder than normal could indicate it needs an油change。Engine parts rubbing together can cause excessive engine noise. Ask a mechanic check the oil level and change or add oil in this case, in addition to replacing the car oil filter if needed.
The Check Engine or Oil Light comes on and remains lit. This indicates a problem with the engine or oil level. Have a mechanic run a diagnostic and check the oil level when this happens.
When a mechanic reports that the oil looks black and gritty, it is definitely time to have the mechanic change the oil.
排气管不冷时吸烟也可能表明油位低。要求机械师检查水平，然后提高到适当的水平或更改。
Most mechanics apply a sticker somewhere inside the driver-side door when changing oil to let vehicle owners know when to change it again. Following a regular maintenance schedule andchanging your vehicle’s oilat regular intervals ensure that a vehicle engine continues to run in prime condition. By using a multiviscosity oil, vehicle owners ensure that they use the best car motor oil to protect their engine.
