I find that different oils from different labs have different amounts of leakage post injection. Not sure of it is that some labs oil is thicker or thinner than others, but once I pull the needle out of the muscle, sometimes it is spotless, and sometimes if I watch it for a few seconds I'll actually see some oil starting to ooze out. Regardless of injection technique. How common is that? My shot this morning, about 1 or 2 seconds after needle was pulled out, I saw the clear oil start running out a bit. Used a long enough needle, injected slow, left it in for a few seconds once plunger was completely compressed. Just sometimes it happens and sometimes it doesn't.