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What is difference between engine oil and lubricant? Are their applications same?

Date:2015年6月10日 09:26

In maintenance, we often hear that: “Engine oil is turbid, and shall be changed. “Why is engine oil turbid? Why shall engine oil be changed?”

Engine oil is applied to engine. Now that it is applied to machinery, we can image that engine oil shall be applied to lubricate machine. The main

 role of engine oil is to reduce the friction between the engines movable parts, guaranteeing flexible running of the engine. We call it “lubrication”

. In fact, engine oil also has other functions, such as cleaning, cooling, rust prevention, sealing, anti-oxidation, buffering, etc.

Cleaning

Cleaning is to clean stains like carbon and oil caused by combustion, or to decompose stains in the oil, or to remove stains by oil filter. Engine oil can

clean engine, remove impurities in the filter, and prevent metal surface from acid corrosion in the process of combustion. Moreover, engine oil can take

 away combustion residue, and lubricant’s combustion products or oxidation products, and is settled to the bottom of oil sump. The oil seems to be black and turbid, so oil quality can be judged

by naked eyes.

Cooling

Cooling is to cool engine. The engine oil can assist cooling system in taking away heat caused by piston. When cooling the piston, oil is ejected from the

reverse side. Therefore, the engine oil must have good cooling performance and high temperature resistance.

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