For leasing, Volvo, and I assume others, require the scheduled services to be performed as a condition of the lease. You either have it done at the dealer, or show proof you did it otherwise. I know nothing about how rigorously this is enforced.

The oil changes are free, but the scheduling is the same short-sighted mentality: Volvo specifies a dino-oil change every 7500 miles. We do it about twice that.

__________________
2002 E320 4-Matic
2008 Subaru Outback
2009 Subaru Forester