Articles, Hydraulics, Lubricant Analysis How Varnish Is Destroying Your Hydraulic System (And How to Stop It) by Greg Livingstone, Jo Ameye, Cristian Soto August 5, 2023 It is common to hear about deposits or varnish in turbine oils, but can other oils also suffer from varnish? The short answer is yes. Once an oil (regardless of... Read more.