What does too low of an oil filter differential pressure suggest?

Too low of an oil filter differential pressure indicates that the pressure drop across the oil filter is less than expected, which typically suggests that the oil is flowing through the filter too easily. This situation can arise due to leakage within the oil system, where oil may be bypassing the filter instead of being properly filtered. In a healthy oil filtration system, there should be enough differential pressure to indicate that the oil is being adequately processed through the filter. A chronic low differential pressure can lead to unfiltered oil circulating through the engine or machinery, which can ultimately cause damage due to the presence of contaminants.

In this context, while other options may present scenarios that could affect differential pressure, such as clogging or excessive oil flow, these would typically manifest as high differential pressure, not low. Normal operation would indicate that there is an expected and appropriate pressure drop across the filter, rather than a low reading suggesting potential leaks.