The injectable will act the same way that the oral will. In my experience, the effect of an injectable "oral" is somewhat stronger mg for mg. The half life will still be the same, so you will want to do every day IM injections. Yes, this product is oil based and can be mixed with any other oil based gear. I cannot comment on the pain level GP injectable Oxan because I have not used it, but outside of the blended gear that combine 2 differnt steroids in 1cc, I have found all of GP to be very painless. Even with the blended gear, I haven't found it to be bad. 1cc ED would be a solid dose