Hi!

How often(engine hours, oil analysis) necessary to carry out oil changes for Turbine engine.

I work with Solar unit, the oil is filled in oil tank 2006, unit works only about two months in year, now we have aprox. 3000 engine hours and ~100 engine starts. The oil filter DP is 0.3bar is ok, alarm 0.5 bar, twice a year i take lube oil sample for laboratory analysis (test results were particularly nothing changes).

My question is:
1) how often you change lube oil?
2) and which is the main reason why you do it?
3) how often you change lube oil filters?
4) maybe someone has experience with Donaldson (Self cleaning air filter),
how often you change the filter elements?


Regards,