Having been in fleet maintenance management most of my life, you can bet this was a corporate penny pinching action that came from the bean counters. “Purchase denied, oil is expensive, we can get one more trip out of it before we add any because it’s due for service when it gets back anyhow”.
Corporate bean counters are the usual suspects when these things happen. They do not understand the concept of “preventative maintenance” at all. They will penny pinch a fleet to death. Been there, it’s a constant battle. And they always blame the drivers and mechanics for their own bad decisions.
Oil sensors and shut down systems were actually designed to protect those engines from corporate bean counters... lol