I agree that you can get more lather from MP. I almost always add castor oil to my MP. It seems to increase the lather. I add 1 tbs per lb of soap. If I add other additives, I cut back abut in the castor. I have also found that rough MP sometimes lathers better than the smooth kind, but not always. What I mean is if you make a scrubby bar, like add some poppy seeds or even somthing more gentle like dried flower petals, and the texture may increase the lather. I don't know why, but that is just something that I have noticed. I am not crazy I promise...well maybe.