Servus, After I bought my V70 from the previous owner already with defective climate, I wanted to get it started again. I built an adapter for filling a long time ago and filled some cars with it, always worked well over the years. (Please at this point no discussion about whether you can do this now, etc.) In this case, however, the air conditioning was not in operation for a very long time and the residual pressure in the system is now s very very low. Now I wonder if it might be necessary to refill oil with it… Wouldn’t want to refill too much. Now to the question: Do you think it is necessary to refill oil? And how do you get out roughly how much is missing? My idea would have been to put 50 ml into the new refrigerant… Thanks already for your help