I am going to try this although I hate the feeling of greasy and dirty hair that I guess you'll have to endure for a while.
My problem is not that my hair is thinning but that it feels coarse (I've got thick hair) and greasy in some places and dry and brittle in others, it gets sort of both dry and greasy at the same time. It's definitely gotten more coarse since I was a kid.
I always assumed it was hormonal. I Liver Flush which has "degreased" my face a lot but I haven't noticed any difference with my hir yet.
I'm hoping your tips about olive oil and OO (Olive-Oil) soap will help. Going to buy an OO (Olive-Oil) soap tomorrow : )