OilLogListMonitor keeps all your oil health data in one place. Log key quality info like sample ID, equipment tag, oil brand and grade, viscosity at 40 °C and 100 °C, VI, TAN, TBN, oxidation, and nitration. Track contamination too ISO 4406 code, particle counts, water, iron and other wear metals, silicon from dust, and any glycol, fuel, or soot. Built in tools save time: swap cSt and SUS, estimate viscosity at a new temperature with a handy D341 helper, and get VI from your 40/100 readings. Go deeper with ISO 4406 code to count and count to code. Convert water ppm to percent saturation using quick lookups by oil type and temperature. Switch between kinematic and dynamic viscosity when you know density. Clean screens, quick entry, and smart defaults help you spot problems early and keep machines running longer.