When oil companies and engine manufacturers recommend to change the engine oil every 250 working hours or 300 hours ,what is the basis of specifying this period, why not 500 hours or 1000 hours or only 150hours.
Viscosity,Viscosity Index, Pour Point,Moisture, acidity, dispersancy, detergency, flash point, TBN and remaining package of additives may be the parameters to decide this oil life. But suppose I run my engine with one oil purifier which removes solid particles every moment upto 1 micron , and constantly removes moisture ,unburnt fuel and other liquid contaminants and also combustion blowby as well as oxidation products dissolved or suspended in oil to reduce the formation of acid, and I run the engine for 2000 hours without any oil change, all the parameters including TBN mentioned above are within allowable limits , Wear Debris analysis says that oil is OK, what else should be done to confirm that this oil can be continued further.
I want to run this oil indefinitely and I am confident about the efficiency of Oil Purifier which I have installed. Is there any lab or agency or oil company which can certify that oil is OK, I know it is OK. With this purifier more than 200 engines have run for 7 years in Tata Steel Ltd, Jamshedpur, India(oil drain period between 1500 hours to 4000 hours against all established beliefs).
If this purifier is accepted and made popular , all the problems of used-oil drainage and polluted environment will be solved.There will be no need to re refine any oil. Why are we adamant on periodic changing of oil, this only serves the purpose of oil companies who are interested in the sale of more and more lubricants. Let the time come when there will be no requirement of changing oil in engines periodically. We must support such people who are involved in such venture.