SERVICE LIFE OF TURBINE OIL

Dear Hoxhaaida,

There is no such thing as service life on Turbine oils, there is life on the additives first, and then life on the base stock.

First you will need a ruler instrument or test see what the additives are doing http://www.fluitec.com and then you can decide how much life is left.

Longevity (service life) of turbine oils depends on the application and the management of the oil during its use. We operate several hydroelectric plants with 30+ years old oils, and they are still OK. And yes, makeup oils were added over time, but the amounts and the frequencies of those additions were not sufficient to significantly impact (improve) oil's characteristics.

As a side note, we never ever replaced turbine oil due to its increased viscosity (which is explained by relatively low operation temp). They were condemned because of their viscosity dropped below the condemning limit (due to shear over the years of use). Of course, there is entirely different story for oils used at higher operation temps (steam and gas turbines).