I think @archersam has actually answered your question. The vans leave the factory either set to “flexible” or “fixed” service intervals. Flexible is determined by operating conditions & driving style, the van will decide when it needs a service & this can vary between 6 & 20k , you will get a message on the dash when the van decides it needs a service. Fixed servicing is 12 months or 10k miles. Most folk with private precious vans ( me included) tend to disregard the service notifications & service more frequently. I do an oil change at 6k miles.Thanks for the info, but can anyone answer my questions?
Plenty of discussion on the forum if you use the search function