Oil Change Periods - Perkins 4012 Manual

5
4012/16 Diesel

Oil change periods

For normal operation of the engine the oil should be changed every 250 hours or annually whichever is the
sooner.
Under certain circumstances where a centrifugal oil filter is fitted to the engine and an oil analysis programme
has been carried out with the oil supplier over a period of 1000 hours of engine operation, it may be possible
to extend the oil change period up to maximum of 350 hours.
To achieve the extended oil change period, a centrifugal oil filter must be fitted and cleaned every 150/200
hours between routine oil changes, and at every oil change point i.e. 350 hours maximum.
As the oil deteriorates it is essential that the following parameters must not be exceeded at the oil change point:
1 The viscosity of the oil must not increase by more than 10cSt at 100 °C.
2 The total base number of the oil should not reduce to less than 50% of the value of new oil.
3 The flash point of the oil should exceed 180 °C.
4 The water content of the oil must not exceed 1%.
5 The fuel content of the oil must not exceed 1%.
Note: Oil samples should be taken from the mean sump oil level of the engine.
User's Handbook, TSL 4186E, Issue 2 59