I have never heard of Medimex...
but I have tried coconutoil. Many curlies like it, but I get zits when I use it
In India oily hair is not a bad thing, so people use lots of hairoils & dont care about the grease.
Theres an oil from Rene Furterer, its great & has a "lemony smoky" herbal scent. It's CG too!
I massage my scalp with this once a week. You can view it here:
I got mine in Paris for around half of that!!