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1999-2004 Mustang Catch Can Uses & Explanations

Written By: Chris Bowman

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Keep blow-by from entering your intake and damaging your Mustang's motor with one simple mod-a catch can. It's a cheap investment that can save the life of your motor.

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An oil catch can will filter out the oil that gets cycled through the PCV valve and back into your Mustang's intake. This can prevent serious engine damage over time if left untreated, especially on forced induction Mustangs.

American Muscle

Facts About 1999-2004 Mustang Oil Catch Cans 

1999-2004 Mustang Intake With Gunk Build-Up
  • Can prevent oil build up, caused by “blow-by”, in the intake

  • Separates contaminated oil from the exhaust gases before being recycled back into the intake to be re-burned

  • Contaminated oil is safely stored in the catch until it is disposed of during oil change​

Mustang Catch Cans – The Basics

How an Oil Catch Can Works - Infographic

Now that you understand how important it is to remove blow-by gases from your engine, you might be thinking, “Why not just vent it all into the atmosphere and prevent it from gumming up my intake and solve both issues at the same time?” Well, that would be illegal and the Environmental Protection Agency (EPA) would want to have a word with you. Don’t worry - there is a safe, legal and easy way to solve both problems at the same time, a catch can. A Catch Can or Air/Oil Separator does just what its name implies: it separates out the contaminated oil from the blow-by exhaust gases before being recycled back into the intake to be re-burned; thus preventing the used oil from re-entering the system to gum up your engine. The captured oil is safely stored in the catch can until it can be properly disposed of during your next routine oil change. AmericanMuscle carries a wide selection of Air/Oil Separators from JLT, Mishimoto and Moroso for all 1999-2004 New Edge Mustangs including the V6, GT, Bullitt, Mach 1 and SVT Cobra models. 

The diagram below illustrates the basics of how a catch can works. The purple arrow represents the air/oil blow-by mixture coming in from the crankcase. It enters the catch can where the oil is collected at the bottom; the air is forced through a media, which filters out additional contaminants before exiting the catch can as cleaned air (green arrow) to be re-circulated back into the intake manifold.