The present disclosure is directed to a screw compressor system having a compressor housing with a pair of screw rotors rotatably supported within a compression chamber. A lubricant port is in fluid communication with the compression chamber. A nozzle insert having a longitudinal body extending between a first end and a second end can be positioned within the lubricant port. A swirl chamber formed by the nozzle insert or tangential flow into an offset lubricant port is configured to generate an atomized lubricant flow and discharge the atomized lubricant into the compression chamber.