2021 Forte GT w/GT2, Currant Red, Wagner-Tuning Intercooler, Evilla Exhaust, Takeda S1 Intake
Adding an oil catch can in the hose from the valve cover to the intake is not a bad idea. It will not affect the engine operation or fuel mileage. It will reduce the amount of residue that eventually requires cleaning of the throttle body. During normal engine operation the engine is ingesting minute oil vapor...during hard accelleration the engine can ingest engine oil through this hose. An oil catch can will eliminate some of the oil and oil vapor from getting to the intake. If someone made an oil catch can that looked good on our engines I wouldn't mind installing one. I just don't care for what's out there -- fit-all type catch cans.