[omasou]

The dealer may have a side scam going w/the rental company which I am guessing has a desk in the service department?

If the factory warranty is void and replaced w/the CPO warranty, again guessing but 1) do you loose the service warranty, if any, e.g. free oil changes and 2) does the CPO warranty have a deductible? If yes, then there is part of your answer but there must be something else b/c it doesn't seem like enough service profit to make it worthwhile, but what do I know.