LSD Oil in normal Diff's

I just want to clarify the story on Diff Oils. I have just replaced the oil in both Diff's, and on advice from my local Castrol oil distributer and in the interest of keeping it simple, I have put LSD oil in both the LSD rear diff and the normal front Diff. I know I can't put normal diff oil in a LSD but is it OK to put LSD oil in a normal Diff. The distributer showed me in the castrol product book where they say their LSD oil is also suitable for normal Diff's. Any advice would be greatly appreciated.