In an engineering engine there will always be a metal to metal contact, the significant of lubrication is very essential because if there is no lubrication, the engine will only work for few minutes and seizure of working parts will occur and this will lead to engine failure.
     Therefore, owing to these proper lubrication is very essential to engine operation and to these end lubricating oil plays a major role in engine lubrication.

![steam-locomotive-1279730_1280.jpg](https://steemitimages.com/DQmch44DQwFDMjSAHekNwkGpa9qgyXitqotoKuNdiY1SnZE/steam-locomotive-1279730_1280.jpg)

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