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If you spent time around trucks in recent years, you’ve seen the rise of catch cans. They’re not a vanity add-on. A well-designed oil separator keeps oily blow-by out of the intake path, which helps modern engines run cleaner for longer—especially on tuned or hard-worked trucks. Why do performance trucks need an oil catch can? All engines create “blow-by”—combustion gases that slip past the rings and into the c...

A quality oil separator keeps oil vapor out of the intake, keeping valves cleaner and maintaining your engine's performance and efficiency. The right unit fits your car without modification, withstands daily driving, and is easy to service. Air Oil Separator Buying Guide Fitment precision A good separator fits the car as it sits, with no cutting, guessing, or hunting for odd adapters. Vehicle-specific kit: Hoses are pre-cut to the correct length...

Modern engines meet tight emissions targets, but they still vent oil-laden crankcase gases back into the intake. Over time, that vapor coats valves, intercooler fins, and spark-plug electrodes. A catch can—more accurately referred to as an oil separator—captures the mist before it turns to sludge. Below, you'll find five clear signals that a factory-fresh daily driver can benefit from this small, preventive upgrade. Stock car oil sepa...