Which condition would be the least likely to be caused by failed or failing engine bearings?

The least likely condition caused by failed or failing engine bearings is low oil temperatures. When bearings are in poor condition, they typically lead to increased friction and heat generation within the engine. This scenario results in high oil temperatures due to the increased resistance and energy loss as the engine operates.

On the other hand, low oil temperatures would generally not be a consequence of bearing failure; rather, low temperatures could occur due to other factors such as ambient conditions, prolonged ground operation without sufficient engine load, or inefficient oil circulation. In contrast, problems like excessive oil consumption, high oil temperatures, and increased engine noise are directly related to issues with the bearings where they may cause oil to leak, result in inefficient lubrication, or create abnormal contact noises.