Since the performance of my air conditioner could not keep up with the high temperatures last week, I had an air conditioning service carried out. There were no whole 370g refrigerants at 500g set. After the service the air conditioning cools again really well, but I wonder something the protocol which was included in the bill (see appendix). Apparently no oil was pumped with and no oil was refilled again. Can this be true or is there no oil in the plant at all? Car is a golf 7 with R134a refrigerant, about 5 years old and probably first climate service.