what! don't listen to the above guys. OBVIOUSLY, they don't know s##t about mixing oil and water together. That, my friend is an infection waiting to happen! When you mix oil and water together, the oil will TRAP some water beneath itself and an infection will start to culminate into a nasty visit to the emergency room. Even though, bact water is sterile, there are still things that can cause an infection to grow. Water based solutions are made that way so that they can absorb quickly into your bloodstream unlike oil solutions which can take anywhere from 1 - 15 days for full absorption. Pins are a penny a piece so take my advice, PLEASE, and don't listen to the above bros and just inject in a different location. I cannot believe anyone in their right mind would say that 'it's okay'...UGH.. research, research and RESEARCH GUYS.. before giving advice..