I always go with a conversion kit so not sure about those % that you are using of BA and BB i hear grapeseed oil is good but i prefer seasame oil but then again thats realy just a preference
is it bruised and red or is it just hurting? One suggestion is get into a real hot bath and soak wherever you inj. to break up the oil if it hard around the inj. site ill look around and see if I can find any other info for you.
Radar could probably give you better help on it than i can.