As Environmental Engineer I appreciate this work, I remember that my father used to give coconut oil as lubricant to my cycle. But automobiles and etc there are pre-fixed standards like boiling point, flash point, volatility etc, we can check all these things but dedicated hard work required to test different oils and at different compositions. i wish we will see these biodegradable natural lubricating oils.

Dear sir

 you are right, we can use coconut oil as lubricant but only for low temperature similarly sal and mustard oil are also used for high speed low load and low heat

Respected Sir,

In the context, It is also right that,the much large the machinery works,the more frequently will be lubrication works.