I have already made up my mind to switch to synthetic compressor lube instead of the petroleum that it came with. All the manual states is to change out the breakin oil at 50 hrs or 30 days whichever comes first. Since I will not have over a couple of hours running time by 30 days, would it hurt anything to just change it out when the synthetic gets here & not wait? I looked at IR's directions online, they recommend using synthetic right from startup & their compressor is not much different than mine. How important is breakin to a compressor? If it is real important to have a few hours on first I could run it for a while with the motor in continuous run mode. Did you wait to change to synthetic & if not has it hurt your performance?