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Hi Mike,

I have worked in Hydroelectric for around 17 year and never came across the Synthetic esters its usually mineral turbine oils for all types both hydraulic and lubrication. I think the reason is that the Synthetic ester is very aggressive towards seals and surfaces it also has some water % as standard so not ideal in a already very humid environment, We have used turbine oils and so long as its maintained and and lubrication system is carefully cared for it works just fine, I believe also that cost is a factor too some turbines hold huge amounts of oil and in hydro mostly no one likes change if its working.

hope this helps,

Cheers,

Sean

RM

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