Does the rear end need to be broken in?

Will any name brand gear oil work, like Lucas? Does the additive have to be for "Sure-Grip". Would something like this work from Advanced Auto?
http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_Trans-X&174;-Posi-Trac&174;-Limited-Slip-Gear-Oil-Additive-K-&-W-Chemical_7070977-P_N3242_T%7CGRP2035_____

I even noticed this Lucas gear oil here says no additives needed, and its $7.99
http://www.autozone.com/autozone/accessories/Lucas-Oil-1-qt-80W-90-high-performance-heavy-duty-gear-oil/_/N-25t1?counter=15&filterByKeyWord=gear+oil&fromString=search&itemIdentifier=693858_0_0_

Thanks for helping!!