Actually guys there was a very interesting thread on here a few weeks ago, I think by Fonz. He was saying that it's not smart to mix water based and oil based solutions in the same injection site/pin. Basically because mixing the 2 will fuck with the release rate of the hormone. Also because it makes the water sit in the injection site for a longer period of time, which is a breeding grouind for bacteria. It was an interesting read, short if I remember but interesting and I'll see if I can find it later.