Hi, I recently moved to the A/C department at my work and have a question. When moving a used condenser oil was coming out of it. In order to install it into another house do you have to add oil to it? It is a Bristol, model #h82j273abca. Any answers would be appreciated as I have been getting mixed answers at work (some people are telling me the refrigerant already has oil in it while others are saying I need to add the oil separately).