If you don't have MOPAR fluid in it, it gives them an "out" to tell you thats what it is.
Royal Purple in mine as well.. no locker issues.
As long as the fluid you use meets MOPAR requirements their "out" goes right out the door!
I don't have lockers...prolly will one of these days, but I do have Amsoil fluid sitting on the shelf waiting for me to have time to change both diffs.
07 JK Unlimited X - 24s, Soft, Auto, 4:10's, Saraha 18's. OME Springs and Shocks, JKS Front and Rear Adj. Bars, JKS Disco's, Spidertrax Wheel Spacers, Mopar Trail Guide.
01 WJ Limited -- Gone to make room for JK Unlimited!
01 TJ for me and my son-----BYE BYE TJ see you on the trails someday....