oil temp vs coolant temp gauge

• 2022-07-27

Oil temp vs coolant temp gauge actually is the same.There are two kinds of engine temperature, one is water temperature, the other is oil temperature. The water temperature and oil temperature settings of engines in different vehicle lines are also different. The temperature of the engine is controlled by the engine cooling system. Generally speaking, the working temperature of the engine coolant is usually between 90 ℃ -95 ℃, which may be slightly higher in summer and slightly lower in winter. The oil temperature is usually the same as the engine water temperature, but in hot summer or when the air conditioner is turned on, the oil temperature will rise, generally between 90 and 120 ℃.

Of course, this temperature range is not absolute. When driving intensely or at a high speed, the engine coolant temperature or oil temperature may still exceed this temperature range. It can only be said that the engine cooling system will try to ensure that the engine water temperature or oil temperature is within this range. When driving my own car, the highest oil temperature reached 138 ℃, and the water temperature reached 95 ℃. Low water temperature is good for the durability of the engine. When the coolant temperature is 90 ℃, various sealants and rubber parts such as water seal oil seal inside the engine bear more pressure, and high temperature has less impact on these rubber parts. But the disadvantage of low water temperature is also obvious, that is, relatively speaking, due to the relatively small temperature difference with the outside world, the heat transfer efficiency is relatively low, and the energy consumed for heat dissipation will be slightly more. Relatively speaking, the working water temperature of German engines is slightly higher than that of Japanese and Korean engines. The cooling temperature is usually between 95 and 105 degrees Celsius. The reason why such a high temperature is designed is mainly to improve the heat dissipation efficiency. According to the previous extensive introduction, the greater the temperature difference between objects, the higher the heat dissipation efficiency, and the smaller the energy consumption in heat dissipation, but the side effect is that the dry engine has a high working temperature, As a result, the durability of sealant, oil seal and other components of each seal will be relatively poor. Therefore, the phenomenon of oil leakage is relatively more common after more than five years of German cars.

The structure of naturally aspirated engine is simpler, the pressure in the engine is smaller, and the temperature is lower. However, due to the support of turbocharger, the temperature and pressure in the engine cylinder are higher, and the water temperature of the engine may be higher.Generally speaking, as long as the cooling system of the engine operates normally, the water temperature and oil temperature of the engine are controllable.