Having worked as a Product Planner at an Automotive manufacturer many, many years ago, I can tell you that Marketing believes long service intervals are a competitive advantage, as the typical customer finds service to be an inconvenience at best, and an irritating hassle at worst. I have been in meetings where Marketing was arguing with Engineering to lengthen the engine oil change interval to be longer than competitors.

A vehicle which needs no service at all is Marketing's dream, and they really do think it would be an important selling point and result in significant incremental sales.