I'm assuming the delivery was lighthearted. If so, the only thing that salesman could do wrong in that situation is fail to open the door for the next person.
I think most would be grateful for the pleasantries and amused by the unexpected forthrightness. One man's opinion, but opening a door, making eye contact, shaking a hand, and introducing yourself by name should be a bare minimum decorum expectation. Those are all good things.
Delivery is everything on his next line, but I think most people in this situation would appreciate his effort and simply say "just here for an oil change." Personally, I like it if it's delivered with a wry smile. That would be memorable and make me laugh on my way to the Service department.
You know yourself. If you have the personality to pull this, or similar pattern breaking off, I think it sets you apart and makes the hard part a little easier.
I agree with Alex. It's always good to address the customer's perceived needs first and provide a choice. The best pitch is never a pitch, it is a conversation.
