How often should 15W-40 oil be changed on the BPU?

The recommended interval for changing 15W-40 oil on the BPU (Base Power Unit) is typically set at 400 hours. This frequency ensures that the engine operates efficiently and is adequately lubricated, which helps in minimizing wear and tear. Regular oil changes prevent contaminants from building up, maintain optimal viscosity, and enhance engine performance, ultimately extending its lifespan. Adhering to this maintenance schedule helps in ensuring that the engine can function reliably under its operating conditions, thus preventing potential issues that could arise from neglecting oil changes. This 400-hour interval aligns with industry standards for similar equipment, making it a practical guideline for effective engine maintenance.