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Oil Catch Cans & Breather Tanks

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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

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 regularly, while others are plumbed to return the oil to the crankcase.

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

Moroso PCV Air/Oil Separators 85474

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 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

Moroso PCV Air/Oil Separators 85481

Moroso PCV Air/Oil Separators 85481

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 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

Moroso PCV Air/Oil Separators 85497

Moroso PCV Air/Oil Separators 85497

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 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

Moroso PCV Air/Oil Separators 85531

Moroso PCV Air/Oil Separators 85531

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 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

Moroso PCV Air/Oil Separators 85683

Moroso PCV Air/Oil Separators 85683

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 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

Moroso PCV Air/Oil Separators 85496

Moroso PCV Air/Oil Separators 85496

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 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

Moroso PCV Air/Oil Separators 85472

Moroso PCV Air/Oil Separators 85472

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 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

Moroso PCV Air/Oil Separators for 2005-2013 MUSTANG - 85477

Moroso PCV Air/Oil Separators for 2005-2013 MUSTANG - 85477

Moroso PCV Air/Oil Separators for 2005-2013 MUSTANG - 85477

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

Part Number: MOR-85477

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Monday 11/17/2025

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Estimated Ship Date: Monday 11/17/2025

Moroso PCV Air/Oil Separators 85682

Moroso PCV Air/Oil Separators 85682

Moroso PCV Air/Oil Separators 85682

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

Part Number: MOR-85682

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Dec 12, 2025 if ordered today

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Estimated Ship Date: Dec 12, 2025 if ordered today

Moroso PCV Air/Oil Separators for 2006-2010 GRAND CHEROKEE - 85482

Moroso PCV Air/Oil Separators for 2006-2010 GRAND CHEROKEE - 85482

Moroso PCV Air/Oil Separators for 2006-2010 GRAND CHEROKEE - 85482

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

Part Number: MOR-85482

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 11, 2025 if ordered today

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Estimated Ship Date: Dec 11, 2025 if ordered today

Moroso PCV Air/Oil Separators for 2011-2014 1500, 2009-2010 RAM 1500 - 85479

Moroso PCV Air/Oil Separators for 2011-2014 1500, 2009-2010 RAM 1500 - 85479

Moroso PCV Air/Oil Separators for 2011-2014 1500, 2009-2010 RAM 1500 - 85479

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

Part Number: MOR-85479

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Dec 11, 2025 if ordered today

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Estimated Ship Date: Dec 11, 2025 if ordered today

Moroso PCV Air/Oil Separators for 2007-2012 MUSTANG - 85478

Moroso PCV Air/Oil Separators for 2007-2012 MUSTANG - 85478

Moroso PCV Air/Oil Separators for 2007-2012 MUSTANG - 85478

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

Part Number: MOR-85478

Not Yet Reviewed

Estimated Ship Date: Dec 11, 2025 if ordered today

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Estimated Ship Date: Dec 11, 2025 if ordered today

Moroso PCV Air/Oil Separators for 2008-2015 LANCER - 85483

Moroso PCV Air/Oil Separators for 2008-2015 LANCER - 85483

Moroso PCV Air/Oil Separators for 2008-2015 LANCER - 85483

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

Part Number: MOR-85483

Not Yet Reviewed

Estimated Ship Date: Dec 11, 2025 if ordered today

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Estimated Ship Date: Dec 11, 2025 if ordered today

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