Interesting to read the reviews. A number of people stated that they could tell a difference in the power output of their engine after changing oils. Their seat of the pants dyno could tell the difference in power output between brands of motor oil. Really?
One guy changed the Mobil 1 full synthetic in his Mini every 3000 miles.
I was afraid maybe Amazon began making motor oil because Bezos's nephew got a new chemistry set for Christmas, but it's actually made by the same company that makes WalMart's oil. So it's WalMart oil, delivered to your door. Not a bad deal if you use WalMart oil.