Thats a lot of oil bro. Your muscle can only handle so much. My suggestion would be to cut back a little. If you are cutting the primo out, you'll probably be able to better tollerate your shots. If you have the muscle size, rear delts and lats work well. I dont put more than .75cc into a rear delt, maybe 2cc into a lat. If you open a new site though, take it easy and use a very small amount first to get the muscle used to it.
Also, massage and foam rolling helps. It will help to release the oil as well as break up scar tissue. Sounds like your muscle needs more of a break than anything though. Be careful as this is the point that a guy is more likely to get an infection, injecting into muscle that is already sore and irritated