I always thought John Mayer was a relatively smart guy, but hanging around with Jessica Simpson must be eroding his intellect - cause just look at how puzzled he seems by those oil quarts. Um, John - you pour the stuff in the bottles into the car. Under no circumstances should you attempt to lubricate any part of your body with that stuff, however. If you want to drink it though, that's okay.
(Kids, it's not okay to drink oil. Uncle Crabbie was making a joke there. Now fix me another Screwdriver and shut your yap.)