i had test prop 200, the PIP was absolutely crippling, and the fucking gear kept crashing.
so, i got some olive oil (i couldnt get grape seed oil or anything else). got some empty sterile vials, put 5cc of olive oil in them. then to sterilize them as much as possible, i put some water in a pan, brought it to a boil and put the vials in there (MAKE SURE YOU PUT NEEDLES [[NO SYRINGE]] THROUGH EACH VIAL TO RELEASE THE PRESSURE). i lowered the flame and let the vials sit for like 10-15 minutes.
then i put 5cc of my test prop 200 in each vial, swished it around a bit, and bam.. i turned it into test prop 100.
you can do the same thing with injectable vitamin v12