How often should I drain the oil separator?

J&L recommends draining the oil separator every 2,000 to 3,000 miles. This will prevent it from overfilling and ensure it functions properly. The knurled base makes removal and draining easy.

What is the purpose of an oil separator?

An oil separator is designed to capture oil vapors from the crankcase before they enter the intake manifold. This prevents oil from diluting the fuel, which can lower octane and reduce engine performance. It's especially helpful on supercharged and turbocharged engines.

Is this oil separator CARB approved?

No, this oil separator is not CARB approved. That means it cannot be shipped to addresses in California. Check your local regulations for compliance requirements.

Specifications

Brand: J&L
Part #: 3012D-B
UPC: 887753721136

J&L 07-14 Ford Mustang GT500 Driver Side Oil Separator 3.0 - Black Anodized

Name: J&L 07-14 Ford Mustang GT500 Driver Side Oil Separator 3.0 - Black Anodized
Brand: J&L
SKU: j-l-j-l-07-14-ford-mustang-gt500-driver-side-oil-separator-3-0-black-anodized-t14-310704
Price: 177.38 USD
Availability: BackOrder

$177.38

On Backorder — Expected to ship by May 10, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Keep oil out of your intake. J&L's oil separator is well-built and easy to drain.

Key Features

Billet aluminum — well-built and durable
Stainless steel mesh filter — traps oil vapor effectively
3oz capacity — holds a good amount of oil between changes
Knurled base — makes draining easy
O-ring seal — prevents leaks

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

During the process of venting crankcase pressure back through your intake track, large amounts of oil, in the form of vapors can gather/accumulate in your intake tube, intake manifold runners and even dilute your gas, lowering its octane level. This happens on all engines and is even worse with forced inducted vehicles (supercharged and turbocharged) as crankcase pressures are increased. To combat this, we have developed an oil separator of our own design. Milled from solid billet aluminum this is a rock-solid piece. It has a knurled tank base for easy removal to drain the spent oil and an O-ring seal to prevent any leaks. Filtering consists of a fine mesh stainless steel screen that traps fine oil vapors and releases them once heavy enough to fall. They then pass through a 1/2" thick 1/16th" aluminum honeycomb filter where they grow every larger and then fall into the bottom. By the time the oil gets through the filter it's too heavy to be passed on into the intake. The tank holds 3 oz of fluid, while that may not sound like a lot, you shouldn’t see that much oil in your PCV system. Drain it every 2000-3000 miles and you will never come close to filling it.