Method and system for sensing engine oil deterioration

A system for sensing engine oil deterioration comprising:

• an engine information collection unit configured to measure an engine RPM (RPM), load (Load), and an engine oil temperature (Temp);
• a deterioration factor calculation unit configured to calculate an amount of change in a deterioration factor (f (RPM, Load, Temp)) of engine oil per revolution of an engine using the engine RPM, the load, and the engine oil temperature;
• and
• a residual oil life operation unit configured to:
• calculate a residual oil life using the calculated amount of change in the deterioration factor;
• and
• calculate the engine oil deterioration degree at a current time point by accumulating a value obtained by multiplying an engine revolutions during a predetermined sampling cycle (Δr) by the calculated amount of change in the deterioration factor to a previous engine oil deterioration degree.