What Is Varnish, Really? Understanding and Solving the Varnish Problem in Lubricated Systems | w/ Elaine Heley Varnish: it’s the hot topic in lubrication reliability—and no, we're not just talking about sticky residue in turbines anymore. In this deep-dive episode of Lubrication Experts, host Rafe Britton welcomes back renowned varnish specialist Elaine Heley, now an independent consultant, for a comprehensive look at what varnish really is, how it forms, how it differs across systems, and—most importantly—how to properly diagnose and remove it. Elaine draws from her years leading varnish diagnostics at Polaris and shares insights from the field, including: The difference between MPC testing and micro patch analysis Why “varnish” is a misleading catch-all term for multiple deposit types How environment, fluid formulation, contaminants, and machine design influence varnish formation A remarkable case study where over 680 lbs of varnish and carbon deposits were removed from a single 132,000 L hydraulic forge system using Delta Xero filters Why solubility enhancers, ion-exchange media, and vacuum dehydrators all have a role—but none are a silver bullet ‍ “There’s no magic pill for varnish—just like in medicine, the first step is diagnosis.” — Elaine Heley If you're dealing with sticky valves, frequent oil top-ups, or unexplained deposit issues, this episode is a must-watch. Discover why you need a customized varnish strategy, and not just a filter swap. Timestamps 0:00 – Intro & Elaine’s new role 3:10 – What is varnish? Hard vs soft vs emulsified 10:45 – MPC vs Micro Patch analysis 24:00 – Common causes of varnish 33:15 – Approaches to varnish removal 42:00 – Case study: 680 lbs of varnish removed 58:00 – Future of varnish diagnostics Need a varnish diagnosis before choosing a fix? Reach out to Elaine via LinkedIn or her consulting practice.