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Read our primer articles on Oil Analysis and Tribology

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We had trial of engine oil for the prolonged drain interval in diesel engines. One of engines had too mach of oil consumption. We have noticed that TBN of motor oil in this engine drops much faster than in other engines which were normal (they had the small oil consumption). We have solved that excessive blow-by of gases from combustion prolongs oxidation of oil and fast dropping TBN. May be this experience will help you.
Hi Sai,
Have you changed the oil since the TBN 3 analysis was completed?
If not I think change the oil and check if the smoking decreases, if you have oil changed did the smoking stop? TBN reduction appears significant because something caused the engine to smoke & reduced the TBN.
Is the air filtration system maintained correctly and in good condition? as dirt ingress could cause this,
Regards
Rob S

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