Abstract: In a device for separating oil from the blow-by exhaust vapors of a combustion engine, a filter stack is mounted in a canister having an inlet port for the intake of vapors from the engine, a gas outlet port for connection to a source of suction for causing the vapors to flow through the canister, and a discharge port communicating with a flow passage for removal of condensed oil. The filter stack is operatively arranged so that the vapors pass in contact with and through the filter stack. A plate partially surrounds the filter so that the oil in the vapors condense, and flow outwardly through the passage between the plate and the interior wall surface of the canister.