If the packaging and API specs are the same, I'd say its the same oil just getting raped at the auto parts stores.
Mobil 1 full synthetic 5 quart jug at walmart is usually around $26 plus tax. At least down here in Louisiana it is.
Walmart has its own brand of full synthetic. I purchased that last time I did my oil change. It was like less than $18 for a 5 quart container. I'd like to know who is refining and packaging it for walmart. It is surely some major oil manufacturer with the walmart branding.....Super Tech.
http://www.walmart.com/search/?query...head=mobil%201
http://www.walmart.com/search/?query...er%20tech%20sy
a quick google search indicates walmart super tech full syn is produced/refined by Warren Oil Company.
http://www.warrenoil.com/