That's just too high a concentration for the gear. The oil dissapates and leaves crystalized gear in your muscle that hurts like hell. Heat the syringe under hot tap water will help a little.
The best soluition is to get some sterile oil and cut the concentration of the gear in half. BTW, you can do this in the syringe befor each injection so you don't have to find a sterile vial to transfer the diluted gear in.