Fleet operators look at differences of a fraction of a cent per mile in making purchasing decisions, and the swing in costs is mostly fuel and wages. Because of this Kenworth pioneered low-drag aerodynamic truck cabs thirty hers ago as a way to cut fuel costs.
Its not easy to hold this kind of quality leadership for three big reasons. First, no one will believe you have the longest lasting trucks until they have already lasted a long time on the road. It's a reputation that takes a while to earn and can be lost quickly. Second, designing a very high-quality piece of machinery is not a textbook problem. Designers learn from other designers over time, and the company accumulates these nuggets of wisdom by providing a good, stable place to work for talented engineers. Third, it is usually quite difficult to convince buyers to pay an up-front premium for future savings, even if the numbers are clear. People tend to be more myopic than economic theory would suggest.
ACTION POINT: Design for the obstacles that confront you.