We researched and compared the top oil catch cans for turbo diesel engines, evaluating their construction, filtration efficiency, ease of installation, and owner-reported results. Turbo diesels produce more blow-by than gas engines, so a quality catch can is essential to reduce intake buildup and protect your EGR and turbo. Our picks are based on manufacturer specs, industry standards, and aggregated owner feedback from thousands of miles of real-world use.
| Photo | Product | Score | Buy |
|---|---|---|---|
 |
Mishimoto Compact Baffled Oil Catch Can Top Pick Baffled internal design, CNC-machined 6061 aluminum, compact 3" diameter |
9.2 | 🛒 Check Price |
 |
JLT Performance 3.0 Oil Separator Best Value 3.0 liter capacity, billet aluminum construction, easy drain valve |
8.7 | 🛒 Check Price |
 |
Saikou Michi Oil Catch Can Premium Build Full billet aluminum, dual-chamber design, sight glass |
9.0 | 🛒 Check Price |
|
Rugged Ridge 2-Port Oil Catch Can Off-Road Tough Heavy-duty steel construction, 2-port design, powder coated |
8.1 | 🛒 Check Price |
 |
UPR Products Single Valve Catch Can Compact Design Small footprint, billet aluminum, check valve |
7.8 | 🛒 Check Price |
 |
Moroso Baffled Oil Catch Can Race Proven Baffled, anodized aluminum, -10 AN fittings |
8.4 | 🛒 Check Price |
 |
AEM Electronics DryFlow Oil Catch Can Simple & Reliable Universal design, plastic body, reusable foam filter |
7.3 | 🛒 Check Price |
1. Mishimoto Compact Baffled Oil Catch Can: Top Pick
In our evaluation, the Mishimoto Compact Baffled Oil Catch Can stands out for its strong construction and effective baffling. We compared its internal design against cheaper mesh-only cans and found that the baffle plates significantly reduce oil carryover into the intake. Owner feedback on turbo diesel trucks like the 6.7L Powerstroke and 6.6L Duramax confirms that it catches a substantial amount of oil vapor without restricting crankcase flow. The CNC-machined aluminum body and anodized finish promise long-term durability, even under hood heat.
However, the Mishimoto is pricier than many competitors, and some owners note that the included hoses are a bit stiff in cold weather. This catch can is best for diesel owners who want a proven, high-quality solution and are willing to pay a premium. If you are on a tight budget or need a simple universal can, you might consider a more affordable option.
- Baffled design prevents oil re-entrainment, proven in diesel applications
- CNC-machined billet aluminum with anodized finish resists corrosion
- Compact size fits tight engine bays; includes mounting bracket and hoses
Pros: Excellent build quality and fit; Baffling works well on high-boost diesels; Easy to drain with petcock valve
Cons: Higher price point than basic cans
2. JLT Performance 3.0 Oil Separator: Best Value
We researched the JLT 3.0 Oil Separator and found it offers excellent value for turbo diesel owners who drive long distances. Its large 3.0-liter capacity means fewer drain stops, and owner reports on diesel forums indicate it catches a good amount of oil. The billet aluminum body is durable, and the included drain valve makes maintenance simple. In our comparison, the JLT is a strong performer for the price.
However, the JLT uses a mesh filter rather than a baffle, which can allow some oil mist to pass through under heavy boost. This design is less effective than baffled cans for high-performance diesels. If you have a heavily modified truck or do extreme towing, you might prefer a baffled can. But for stock to mildly tuned diesels, the JLT is a cost-effective choice.
- Large 3.0L capacity reduces drain frequency on high-mileage diesels
- Billet aluminum body with black powder coat resists heat and vibration
- Quick-connect drain valve for tool-free emptying
Pros: Generous capacity for long intervals; Solid build at a reasonable price; Universal mounting bracket fits many vehicles
Cons: No internal baffle, relies on mesh filter
3. Saikou Michi Oil Catch Can: Premium Build
Our evaluation of the Saikou Michi Oil Catch Can reveals a premium product that excels in both form and function. The dual-chamber design and internal baffle are engineered to maximize oil separation, which we confirmed through owner feedback on turbo diesel engines. The single-piece billet construction eliminates weld failure points, and the sight glass is a convenient feature. This can is built to last.
That said, the Saikou Michi is among the most expensive catch cans on the market. For a stock daily driver, the cost may not be justified. It is best suited for enthusiasts with modified diesels who demand the best separation and are willing to invest in top-tier hardware. If you don’t need the extra performance, a simpler can will suffice.
- Dual-chamber design with internal baffle for superior oil separation
- Machined from a single billet of 6061 aluminum, no welds
- Integrated sight glass for easy level monitoring
Pros: Exceptional build quality and aesthetics; Effective separation even under high boost; Sight glass allows quick check without opening
Cons: Expensive; may be overkill for mild builds
4. Rugged Ridge 2-Port Oil Catch Can: Off-Road Tough
We researched the Rugged Ridge 2-Port Oil Catch Can and found it to be a durable option for off-road diesel vehicles. Its steel construction can withstand rocks and debris, and the powder coat resists corrosion. Owner feedback from Jeep diesel owners indicates it captures a reasonable amount of oil, though not as effectively as baffled cans. It is easy to install and maintain.
However, the lack of an internal baffle and reliance on a mesh filter means performance is limited under sustained high boost. The steel body also adds weight. This catch can is best for off-road enthusiasts who prioritize toughness over maximum filtration. If you drive a street truck with heavy modifications, consider a baffled aluminum can instead.
- Steel body with textured powder coat for off-road durability
- Simple 2-port design for straightforward installation
- Includes stainless steel mesh filter media
Pros: Very rugged and impact resistant; Affordable price point; Works well in dusty environments
Cons: Steel is heavier than aluminum; No baffle; mesh can clog over time
5. UPR Products Single Valve Catch Can: Compact Design
In our comparison, the UPR Single Valve Catch Can is a budget-friendly option for those with limited space. Its small size allows it to fit where larger cans cannot, and the check valve is a nice touch for maintaining proper crankcase pressure. Owner feedback on diesel forums is mixed: some report adequate oil collection, while others find it fills quickly. The billet aluminum construction is decent for the price.
However, the small capacity means you will need to drain it often, especially on high-mileage diesels. Without a sight glass, checking the oil level requires disassembly. This catch can is best for light-duty diesel cars or trucks with short commutes. If you drive long distances or tow heavy loads, a larger capacity can would be more practical.
- Compact size fits in tight engine bays
- Billet aluminum body with clear anodized finish
- Integrated check valve prevents backflow
Pros: Very small and easy to mount; Check valve helps maintain crankcase pressure; Good value for the price
Cons: Small capacity requires frequent draining; No sight glass; must disassemble to check level
6. Moroso Baffled Oil Catch Can: Race Proven
We evaluated the Moroso Baffled Oil Catch Can and found it to be a race-oriented option that works well on turbo diesels. Its baffle design is effective at separating oil even under extreme conditions, and the anodized aluminum body is built to last. Owner feedback from diesel drag racers confirms it keeps intake systems clean. The -10 AN fittings allow for custom hose routing.
However, the Moroso does not come with hoses or mounting hardware, so total cost can add up. It is also larger than some competitors. This catch can is best for performance diesel enthusiasts who already have a braided hose setup and want maximum filtration. For a street-driven truck, the extra expense and effort may not be necessary.
- Internal baffle design proven in racing applications
- Anodized aluminum resists heat and corrosion
- Equipped with -10 AN male fittings for braided hose
Pros: Effective at high RPM and boost; Professional-grade fittings; Durable construction
Cons: AN fittings require additional hose and adapters; Higher cost for the can alone
7. AEM Electronics DryFlow Oil Catch Can: Simple & Reliable
We researched the AEM DryFlow Oil Catch Can as an entry-level option for turbo diesel owners on a strict budget. Its plastic body keeps weight and cost low, and the reusable foam filter is easy to clean. Owner feedback indicates it catches some oil, but not as much as metal baffled cans. It is simple to install and works fine for light-duty use.
However, the plastic construction raises durability concerns under the high heat of a turbo diesel engine. Some owners report cracking after a year or two. The foam filter also allows more oil mist to pass through compared to baffled designs. This catch can is best for low-budget builds or temporary setups. For long-term reliability, we recommend investing in a metal can with better filtration.
- Lightweight plastic body with integrated mounting bracket
- Reusable foam filter element (washable)
- Universal fit with included hose barbs
Pros: Very affordable; Lightweight and easy to install; Filter is washable and reusable
Cons: Plastic body may crack under heat over time; Foam filter less effective than baffle or mesh
Frequently Asked Questions
Do I really need an oil catch can on a turbo diesel?
Yes, turbo diesel engines produce significant blow-by gases that contain oil vapor. Without a catch can, this oil accumulates in the intake manifold, EGR valve, and intercooler, reducing performance and potentially causing carbon buildup. A catch can traps the oil before it reaches these components, helping maintain engine efficiency and longevity.
How often do I need to empty an oil catch can?
Drain frequency depends on your engine condition, driving habits, and can capacity. For a healthy turbo diesel, expect to empty a 1-liter can every 3,000 to 5,000 miles. Larger cans or those with sight glasses allow longer intervals. Check the can monthly and empty when it is about half full to prevent overflow.
Will a catch can affect my warranty?
Installing an aftermarket catch can may affect your vehicle’s warranty if it causes damage or is deemed a modification. However, many manufacturers allow such additions as long as they are installed correctly and do not interfere with emissions systems. Check your warranty terms and consider using a CARB-legal can if you are concerned.
Can I install a catch can on a diesel with a closed crankcase ventilation system?
Yes, most modern turbo diesels have a closed PCV system that routes blow-by back into the intake. A catch can can be installed inline to filter the oil vapor. Ensure the can is properly sealed and does not create a vacuum leak. Some systems may require a check valve to maintain proper crankcase pressure.
What is the difference between a baffled and mesh catch can?
Baffled catch cans use internal plates to force oil to condense and drip down, while mesh cans use a filter medium to capture droplets. Baffled cans generally offer better separation efficiency under high flow and boost conditions, making them preferable for turbo diesels. Mesh cans can clog over time and may allow more oil carryover.
Our Verdict
After researching and comparing the top options, our top pick is the Mishimoto Compact Baffled Oil Catch Can for its proven baffle design, durable construction, and excellent owner feedback on turbo diesels. For a more budget-friendly choice that still performs well, the JLT Performance 3.0 Oil Separator offers great value with its large capacity and solid build. Choose based on your specific engine setup and driving demands.
More Engine Oil Guides
Video Guide
Video: Related tutorial from YouTube