Surface analysis of hydraulic gear pumps used in gas turbine failure power generation reveals service life limitations due to gear wear and scuffing. A flexible tribology testing capability (WAM) provides an ability to simulate lubrication and failure mechanisms. A load capacity test protocol developed for gas turbine MIL-PRF-23699 oils is found to invoke the same lubrication and failure mechanisms experienced in hydraulic gear pumps. Scuffing, micro-scuffing and traction (friction) data from load capacity tests show variable lubricating qualities among turbine engine oils used in service. A test protocol that monitors the traction coefficient over a range of load stages reflects both wear and scuffing attributes of oils used in service. The test method shows performance differences among oil types within the same specification and a reduction in wear performance with used oils. The test approach provides an opportunity for more efficient development of gear materials, lubricants and engineered surfaces.