An apparatus separates liquid, gas and solid components of a mixture in an engine lubricating system. An inlet for receiving the mixture opens tangentially into a separation chamber and a gas outlet has an opening in a first end wall adjacent the inlet to allow gas to exit the separator. A fluid outlet is in an opposing second end wall and opens into a lubricant reservoir of the engine lubricating system. Both liquid and gas flow through the fluid outlet between the separator and the reservoir. A particle collector is provided adjacent the second end wall to receive solids that become separated from the mixture. A baffle may be provided to direct the separated liquid from the separator into the reservoir while allowing gas in the reservoir to flow into the separator.