You have done everything possible to minimize your operating costs. In fact, they have been managed down to a razor’s edge from purchasing, to maintenance of your fleet, to fuel costs and, ultimately, to how vehicles are sold. Is there anything more that can be done? If you own your vehicles, depreciate them for tax purposes, and sell them rather than trade them in, there is another advantage for you to gain — income tax deferral via “tax-deferred exchanges” rather than the existing practice of selling older vehicles and purchasing new ones.