can you explain how an oil change is an object, otherwise it seems like you've got the wrong predicate. Knowledge isn't an object, either. Neither is "Kung Fu", "taking a shower", or "crossing the road."
I would like my own suborbital two-seat rocket plane. That is an object. I probably will never have a two-seat rocket plane. I would like to win the lottery when it's over $300mm, the object would be the $150mm in after-tax winnings. I will probably never have $150mm in lottery winnings.
I very specifically mentioned the lottery so maybe it "clicks" what's being talked about, at least the way i read it.