I just replaced my AC condenser as it had a leak and my system is was completely empty of Freon. I know how to vacuum the system and how to charge it the only info I can’t be completely certain on is do I need to add AC oil along with the Freon or is the oil still in the compressor? I only ask this because I’ve read when some of the AC compressors kits on here that have been changed there was already oil in them and Freon was only needed. Thank you in advance for any insight or help into thisendeavor.