How often should MEP 12 oil be changed?

The correct answer is based on the manufacturer's recommendation for maintaining MEP 12 engines. Changing the oil every 300 hours of operation ensures optimal performance and longevity of the engine. Regular oil changes are crucial because oil degradation occurs over time due to exposure to heat, pressure, and contaminants such as soot and moisture. Adhering to a 300-hour interval allows for the effective removal of these contaminants, thus maintaining proper lubrication and preventing excessive wear on engine components.

In contrast, intervals of 150, 250, or 500 hours may not adequately address the condition of the oil and the engine's needs, potentially leading to decreased performance, increased wear, or even engine failure if not monitored properly. Therefore, following the 300-hour guideline is essential for effective engine maintenance and reliability.