J&L Oil Separator

2021–2022 Jeep Wrangler Unlimited Rubicon 392 6.4L

Part #: 3072P-B

Overview

The J&L Black Anodized Oil Separator is a precision-engineered solution designed specifically for the passenger side of the 2021 to 2022 Jeep Wrangler Unlimited Rubicon 392 equipped with the 6.4L engine. This high-performance oil separator effectively addresses the common issue of oil vapor buildup within the intake system caused by crankcase ventilation. By separating oil from crankcase vapors before they re-enter the intake, it helps maintain optimal engine performance, fuel quality, and overall engine cleanliness.

Ideal for Jeep enthusiasts who demand reliability and efficiency, this oil separator reduces oil contamination in the intake manifold runners and intake tube, preventing octane dilution and preserving engine power. It is especially beneficial for the Rubicon 392’s naturally aspirated 6.4L V8, where elevated crankcase pressures can lead to increased oil vapor production.

Key Features

Engineered with advanced filtration technology and durable materials, the J&L Oil Separator delivers superior performance and long-lasting reliability:

• Multistage filtration system featuring a fine mesh stainless steel screen to trap microscopic oil vapors
• 1/2" thick, 1/16" aluminum honeycomb filter that coalesces oil droplets for efficient separation
• 3-ounce fluid capacity to collect and hold separated oil before draining
• Knurled tank base for easy removal and mess-free draining of collected oil
• O-ring seal ensures a leak-free, secure installation
• Black anodized finish provides corrosion resistance and a sleek under-hood appearance
• Direct-fit design tailored exclusively for the passenger side of the Jeep Wrangler Unlimited Rubicon 392 (2021–2022)
• Helps maintain fuel octane and engine cleanliness by preventing oil vapor contamination

Construction & Design

Crafted from solid billet aluminum, the J&L Oil Separator offers exceptional strength and durability to withstand the demanding conditions of off-road and high-performance driving. The black anodized finish not only enhances corrosion resistance but also delivers a professional, high-quality look under the hood.

The internal filtration system combines a fine stainless steel mesh with a precision-machined aluminum honeycomb filter, engineered to capture the smallest oil vapors and allow only clean air to pass through. The separator’s knurled base design facilitates effortless removal for routine maintenance, while the O-ring seal guarantees a tight, leak-free fit for reliable operation over time.

Installation & Fitment

This oil separator is a direct-fit replacement designed exclusively for the passenger side of the 2021 to 2022 Jeep Wrangler Unlimited Rubicon 392 with the 6.4L engine. Installation requires no modifications and can be completed quickly using basic hand tools. The unit integrates seamlessly with the existing PCV system, providing a hassle-free upgrade that enhances engine performance and longevity.

What's Included

• J&L Black Anodized Oil Separator (Passenger Side)
• O-ring seal
• Installation instructions

Ideal For

This oil separator is ideal for Jeep Wrangler Unlimited Rubicon 392 owners who want to maintain peak engine efficiency and protect their intake system from oil vapor contamination. It is especially suited for enthusiasts who drive aggressively or use their vehicles in demanding conditions, where crankcase pressures and oil vapor production are higher than average. By preventing oil vapor buildup, it helps preserve engine power, fuel quality, and overall reliability.

J&L Oil Separator Co. builds application-specific oil catch cans (air/oil separators) designed to trap blow-by vapors before they contaminate intake and intercooler plumbing. It’s a practical performance upgrade for boosted and high-output engines, helping reduce carbon/oil buildup and keep intake charge paths cleaner over time.