What is a potential drawback of inadequate vehicle rotation in a fleet?

Inadequate vehicle rotation in a fleet can lead to increased maintenance costs because vehicles that are not rotated properly may experience uneven wear and tear. This uneven usage can result in certain vehicles suffering from more frequent breakdowns, leading to costly repairs over time. For instance, if a specific vehicle is used excessively without allowing others to share the workload, components such as tires, brakes, and engines may wear out faster than anticipated. This imbalance not only drives up maintenance costs but can also lead to downtime when these vehicles are out for repairs, affecting overall fleet efficiency.

While the other options highlight valid concerns, they are often secondary issues stemming from the primary problem of maintenance costs. Regularly rotating vehicles helps mitigate wear and can lead to longer vehicle lifespans, thereby controlling maintenance expenses effectively.