Phone a local compressor dealer and ask them. They have charts which can give show how much for 0.5 ppm in terms of ounces /100 cfm. If they can't help you phone Shawn Homer at Sullair Corp, Mich. City, IN and they can help you (or call a local Sullair compressor distributor) I can help but all my stuff s in storge as moving. I can only tell you that you are still getting plenty of oil carrover down stream as 0.5 ppm considered to be only General Purpose Air quality. There are a lot of factors involved such as type of oil, air temperatures, rotary screw or reciprocating piston,etc. If oil is a problem (is to most manufactures) then consider installing a High Grade Oil Coalescing Filter either centrally in the main line or smaller filters on branch lines closest to the application that needs protection. A 0.5 ppm filter/mist eliminator most often is considered to only being a first stage filter and thus for cleaner air a second stage or third stage should be added 0.1 ppm or 0.01 ppm. It is advisable to have an air dryer as well which i am assuming you already have ?? Contact me if need more info. airboss2@comcast.net