Why Traditional Oil Analysis Often Misses Fuel Dilution Events: The blind spot is between samples

Most oil analysis programs are built around calendar intervals, engine-hour intervals or scheduled maintenance events. A locomotive, haul truck, underground loader or stationary power engine may be sampled every 250 hours, 500 hours or according to a site-specific preventive maintenance plan. That cadence may be effective for trending long-term oil health. But it is not well matched to a fuel dilution event that can accelerate within hours.