Got this from anabolex:
I occasionally see a few posts about oil leaking out of an injection site. this issue isn't something to be all that concerned about, but i use a technique that I learned in nursing school for IM injections that I thought I'd pass on here. for those interested.
I believe it's called the "Z" method or something like that, maybe a doctor can verify or whatever, here's how you do it;
Let's take a quad injection site. Of course, prep the site. once you know where you're going to inject, kind of put your finger, hand or whatever on the skin and move the skin a few cm, 1/4 inch, get it taught. just move the skin, don't pull it up or anything, just move it. Then inject, pull the pin out, let go of the skin. The path the needle took into the muscle will then be segmented instead of still a straight line. Hope that makes sense.