Well, I am not sure, but I guess you COULD do this. Might be some underground lab ... i forget what lab you said it was from. Some UG labs will put test suspenion in an oil, and since stanozolol is crystaline like test suspension I guess they both could be put into oil. Although I haven't tried either one in oil suspension. I guess the only real problem might be that the oil is more viscous than water and you would have to really shake the crap out of the vial to make sure that the crystals resuspend.
Maybe they encountered problems when they tried to make the water suspension? I don't know.