Oil Catch Cans & Breather Tanks

Oil catch cans and breather tanks look similar and do similar jobs, but they serve different purposes.

Oil Catch Cans

Normally, the PCV (positive crankcase ventilation)...

Oil catch cans and breather tanks look similar and do similar jobs, but they serve different purposes.

Oil Catch Cans

Normally, the PCV (positive crankcase ventilation) valve uses intake vacuum to relieve the pressure inside your crankcase, but that can result in oil mist and other blow-by contaminants building up on the valve and pistons, especially in direct-injection engines. An oil catch can (sometimes called an air/oil separator) is installed between the PCV valve and the intake, where it removes contaminants and allows only clean air to return to the intake manifold. Some have a reservoir that needs to be drained...

Oil catch cans and breather tanks look similar and do similar jobs, but they serve different purposes.

Oil Catch Cans

Breather Tanks

In forced induction and racing applications, the build-up of crankcase pressure can be much greater, so a breather tank is designed to vent that excess pressure into the atmosphere. They capture some blow-by with a catch can and air filter, and they may have an oil return. Importantly, breather tanks may not meet local emissions standards.

Top Brands

These devices are easy insurance for your high performance engine, and some builders use both a catch can and a breather tank. Summit Racing Equipment carries catch cans from trusted brands like Moroso, Mishimoto, Canton Racing, Ford Performance, JLT Performance, and many more.

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Moroso PCV Air/Oil Separators 85474

Air, Oil, Separator Tank, Aluminum, Polished, 3 in. Diameter, 4 in. Height, Kit

Part Number: MOR-85474

4.76 out of 5 stars ( 46 )

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K&N Oil Catch Cans 81-0805

Oil Catch Can, Round, Aluminum, Black, 6.0 oz. Capacity, Cadillac, Chevy, GMC, Kit

Part Number: KNN-81-0805

5.0 out of 5 stars ( 6 )

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K&N Oil Catch Cans for 2018-2021 EXPEDITION, 2011-2024 F-150 - 81-0800

Oil Catch Can, Round, Aluminum, Black, 6.0 oz. Capacity, Ford, Kit

Part Number: KNN-81-0800

4.0 out of 5 stars ( 5 )

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Moroso PCV Air/Oil Separators 85481

Air, Oil, Separator Tank, Aluminum, Polished, 3 in. Diameter, 4 in. Height, Chevy, GMC, Hummer, Kit

Part Number: MOR-85481

4.69 out of 5 stars ( 61 )

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Moroso PCV Air/Oil Separators 85497

Air, Oil, Separator Tank, Round, Aluminum, Black Anodized, Rubber Hose, Mounting Clamp, Kit

Part Number: MOR-85497

4.71 out of 5 stars ( 21 )

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K&N Oil Catch Cans 81-0804

Oil Catch Can, Round, Aluminum, Black, 6.0 oz. Capacity, Cadillac, Chevy, GMC, Kit

Part Number: KNN-81-0804

5.0 out of 5 stars ( 4 )

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Moroso PCV Air/Oil Separators 85531

Oil Catch Cans, Air/Oil Separator Tank, Aluminum, Black Anodized, Large Body, Kit

Part Number: MOR-85531

4.5 out of 5 stars ( 2 )

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Moroso PCV Air/Oil Separators 85496

Air, Oil, Separator Tank, Round, Aluminum, Natural, Mounting Clamp, Kit

Part Number: MOR-85496

4.48 out of 5 stars ( 21 )

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Moroso PCV Air/Oil Separators for 2010-2015 CAMARO - 85487

Air, Oil, Separator Tank, Aluminum, Polished, 3 in. Diameter, 4 in. Height, Rubber Hose, Clamp, Chevy, Kit

Part Number: MOR-85487

4.81 out of 5 stars ( 32 )

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JOES Racing Products Vent Tanks 12310

JOES Racing Products Vent Tanks 12310

Vent Tank, Round, 6 oz. Capacity, Aluminum, Natural, 1/4 in. NPT Female Threads Inlet, Each

Part Number: JOE-12310

5.0 out of 5 stars ( 3 )

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K&N Oil Catch Cans 81-0812

Oil Catch Can, Aluminum, Black, Round, 6 oz. Capacity, Chevrolet, GMC, Kit

Part Number: KNN-81-0812

Not Yet Reviewed

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JOES Racing Products Vent Tanks 12318

Vent Tank, Kart/Jr. Dragster, Round, Aluminum, Natural, 4.000 in. Length, 1/4 in. Hose Barb Inlet, Each

Part Number: JOE-12318

4.13 out of 5 stars ( 8 )

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Moroso PCV Air/Oil Separators for 1997-2004 CORVETTE - 85516

Air, Oil, Separator Tank, Aluminum, Polished, 2.875 in. Diameter, 4.5 in. Height, Chevy, Kit

Part Number: MOR-85516

4.67 out of 5 stars ( 9 )

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Moroso PCV Air/Oil Separators for 2009-2014 CTS - 85603

Air, Oil, Separator Tank, Aluminum, Black Anodized, Cadillac, CTS-V, Kit

Part Number: MOR-85603

4.71 out of 5 stars ( 7 )

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JOES Racing Products Vent Tanks 12410

Breather Tank, Dry Sump, Aluminum, Natural, Surface Mount, Each

Part Number: JOE-12410

4.86 out of 5 stars ( 7 )

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K&N Oil Catch Cans for 2016-2024 CAMARO - 81-0807

Oil Catch Can, Round, Aluminum, Black, 6.0 oz. Capacity, Chevy, Kit

Part Number: KNN-81-0807

Not Yet Reviewed

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Moroso PCV Air/Oil Separators for 2005-2013 CORVETTE - 85521

Separator Tank, PCV Air/Oil Separator, Round, Aluminum, Polished, Chevy, Kit

Part Number: MOR-85521

4.86 out of 5 stars ( 7 )

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JOES Racing Products Vent Tanks 12309

Oil Catch Cans, Differential/Transmission Vent Tank, Sheet Metal Mount, -8AN Fitting, Each

Part Number: JOE-12309

5.0 out of 5 stars ( 1 )

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Moroso PCV Air/Oil Separators 85683

Separator Tank, PCV Air/Oil Separator, Round, Aluminum, Black Anodized, Clear Base, Small Body Separator Tank, Kit

Part Number: MOR-85683

5.0 out of 5 stars ( 2 )

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Moroso PCV Air/Oil Separators 85472

Air, Oil, Separator Tank, Aluminum, Polished, 3 in. Diameter, 4 in. Height, Chrysler, Dodge, Kit

Part Number: MOR-85472

4.7 out of 5 stars ( 30 )

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K&N Oil Catch Cans 81-0801

Oil Catch Can, Round, Aluminum, Black, 6.0 oz. Capacity, 6.2L, Dodge, Jeep, Chrysler, Kit

Part Number: KNN-81-0801

3.67 out of 5 stars ( 3 )

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Moroso PCV Air/Oil Separators 85723

Oil Catch Can, Harley-Davidson®, Milwaukee Eight, Black, Stock Air Cleaner, Screaming Eagle Air Cleaner, Kit

Part Number: MOR-85723

5.0 out of 5 stars ( 2 )

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Moroso PCV Air/Oil Separators 85533

Oil Catch Can, Aluminum, Black, 3 in. Diameter, 4 in. Height, Chevy, Each

Part Number: MOR-85533

Not Yet Reviewed

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K&N Oil Catch Cans 81-0803

Catch Can, Aluminum, Black, Round, 6 oz. Capacity, Stock Fittings, Dodge, Jeep, Kit

Part Number: KNN-81-0803

Not Yet Reviewed

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JOES Racing Products Vent Tanks 12402

Breather Tank, Dry Sump, Rectangular, 1.5 qt. Capacity, Aluminum, Natural, 3/4 in. NPT Female Threads Inlet

Part Number: JOE-12402

5.0 out of 5 stars ( 1 )

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