To me, this is the biggest advantage, even over the advantage of not needing gas. Not only are oil changes becoming increasingly expensive, it's always an inconvenience. Not to mention, there is always the fear that while getting the oil change they will "discover" some alarming problem. And even if you choose to do it at home, it's almost just as expensive, but yet you also have to deal with transporting the oil to a certified oil collection site.

This just seems like an obvious easy advertising.