Some may have seen my recent thread about air compressor size. Well I returned the 0.9hp 6ga unit and picked up a Campbell h. vt620400aj 20ga unit rated for 6-8cfm from 40-125psi. Used but seems to work well. Anyways I picked up some powermate “all weather” air compressor oil at menards looking to change that out (as well as a slightly bent drain cock). So far sounds and functions fine. Is there any specs for air compressor oil I need to meet or is it basically all the same?