Engines manage this, normally with a pcv system, valve, on a separate circuit. and or an antibackfire valve, or filtration.
Those that dont, dont
Before 68 when pcv was not an emission requirement, cars had a road draft tube that evacuated gases from the crankcase.
Vehicles with excessive blowby can have ring failure.
an oil consumption test can often be the first recommendation in the diagnosis.
Inspection of the parts and hoses is the quickest method to reduce oil loss. A stuck, blocked, or failed valve, a valve that is the wrong calibration, etc can be found this way by your dealer.
Don't be surprised if they want to remove your aftermarket replacement parts and have you use the specified part # from the MFR.
change the pcv valve and the breather element if it has one. if the pcv is bad and letting oil past the valve, oil will get into the intake past the throttle body.
Most often it means you have a plugged PCV valve. But if that's operating properly and the engine has high miles, it can mean excessive blowby due to worn piston rings.
Yes
You've got some compression leaking out of the combustion chamber..
it means you have excessive crankcase blow by. make sure your PCV valve is working correctly.
