Systems, methods, and apparatuses provided herein relate to a controller for determining a pressure differential across a fluid filter by receiving inlet pressure data regarding a pressure of the fluid upstream of the filtering element, receiving outlet pressure data regarding a pressure of the fluid downstream of the filtering element, receiving engine speed data regarding a speed of the engine, receiving temperature data regarding a temperature of the fluid, and determining a pressure drop across the filtering element based on the inlet pressure data, the outlet pressure data, the engine speed data, and the temperature data.