Oil Catch Cans

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Browse & shop Oil Catch Cans & Air Oil Separators for your car or truck.

Oil catch cans and air oil separators (AOS) are designed to reduce oil vapor buildup in the intake system by separating oil from crankcase gases before they are recirculated. These systems are especially beneficial for turbocharged Subaru engines, where blow-by and oil contamination can impact performance, reliability, and long-term engine health.

Upgraded oil control solutions are commonly used on Subaru WRX and STI platforms to help keep intake components cleaner, reduce carbon buildup, and support consistent performance in both street-driven and high-performance applications.

Oil Catch Cans & AOS for Subaru WRX & STI

Oil catch cans and AOS systems designed for the Subaru WRX and STI help manage oil vapor and blow-by produced under boost. By preventing excess oil from entering the intake tract, these systems support cleaner combustion, improved consistency, and reduced buildup on intake valves and intercooler components.

AOS systems are often preferred for daily-driven vehicles because they continuously separate and return oil to the engine, requiring little maintenance. Traditional oil catch cans collect oil in a reservoir that must be periodically drained, making them a flexible option for certain setups and driving styles.

Choosing the right oil control solution depends on your engine platform, power level, and intended use. Stock and lightly modified vehicles may benefit from simple oil separation, while higher-boost or track-driven builds often require more robust solutions designed to handle increased crankcase pressure.

Oil Catch Can vs AOS. What’s the Difference?

Oil catch cans store collected oil in a separate reservoir that requires manual draining, while air oil separators continuously return separated oil back to the engine. AOS systems are typically favored for daily-driven vehicles, while catch cans may be preferred in certain performance or track-focused applications depending on setup and maintenance preferences.