Diesel engines are known for their power and efficiency, but one common issue they face is the accumulation of oil vapors and contaminants in the intake system. Over time, this can lead to engine damage, reduced performance, and higher maintenance costs. To combat this, many diesel owners turn to oil catch cans, devices designed to capture and prevent these harmful substances from entering the engine. In this article, we will explore the top 7 diesel oil catch cans for 2025, examining their features, benefits, and why they stand out in the market.
What is a Diesel Oil Catch Can?
Before diving into the best options, it’s important to understand what a diesel oil catch can is and why it’s necessary for your engine. A diesel oil catch can is a device that intercepts the blow-by gases produced in the combustion chamber of a diesel engine. These gases often contain oil vapor, moisture, and other contaminants, which can degrade engine components if allowed to enter the intake system. The oil catch can collects these substances, preventing them from reaching vital engine parts like the intake valves, turbocharger, and intercooler.
7 Best Diesel Oil Catch Cans in 2025: A Comprehensive Guide
1. Mishimoto Diesel Oil Catch Can
Key Features:
Capacity: 5 oz.
Material: Billet aluminum
Design: Dual chamber filtration
Finish: Anodized black or silver
Mishimoto is a brand well-known for its high-performance automotive parts, and their diesel oil catch can is no exception. Designed specifically for diesel engines, the Mishimoto catch can features a dual-chamber filtration system that maximizes oil and vapor separation. It has a high-quality billet aluminum construction, making it both durable and lightweight.
The catch can’s dual-chamber design ensures maximum capture of oil vapor, while the high-flow design ensures no reduction in engine performance. The easy-to-install kit includes all the necessary fittings and hoses, making it perfect for DIY enthusiasts or professional installers.
Why It Stands Out:
The Mishimoto catch can is one of the best options for those looking for a balance between performance, durability, and ease of installation. Its anodized finish ensures protection from corrosion, while the design maximizes vapor collection.
2. AllinOne Diesel Oil Catch Can
Key Features:
Capacity: 12 oz.
Material: Stainless steel
Design: Single chamber, mesh filter
Finish: Brushed metal
The AllinOne Diesel Oil Catch Can is an affordable yet effective solution for protecting your diesel engine. Made from stainless steel, it offers excellent resistance to corrosion and rust, ensuring a long lifespan. The 12 oz. capacity provides more room for oil vapor collection, making it suitable for larger diesel engines or heavy-duty applications.
With a mesh filter design, it captures oil and vapor while allowing for optimal airflow. The AllinOne catch can is equipped with a quick-drain valve, making it easy to empty without needing to remove the unit.
Why It Stands Out:
The AllinOne Diesel Oil Catch Can is a budget-friendly option that still offers excellent performance. Its large capacity and easy drain feature make it an attractive choice for diesel owners who want to prevent oil contamination without breaking the bank.
3. FX Racing Diesel Oil Catch Can
Key Features:
Capacity: 8 oz.
Material: Anodized aluminum
Design: Internal baffle with sintered bronze filter
Finish: Gloss black, red, or blue
The FX Racing Diesel Oil Catch Can is engineered with a unique sintered bronze filter that provides superior filtration of oil vapors. This catch can features an internal baffle to increase oil separation efficiency. Its anodized aluminum body ensures durability and resistance to corrosion, while its sleek, glossy finish provides an aesthetically pleasing addition to your engine bay.
The FX Racing catch can includes a CNC-machined billet bracket for secure mounting, ensuring it stays in place under even the toughest conditions. It’s an excellent choice for both performance enthusiasts and everyday diesel drivers.
Why It Stands Out:
With its sintered bronze filter and internal baffle design, the FX Racing catch can is a high-performance option. Its build quality and aesthetic finishes make it a popular choice among diesel enthusiasts.
4. Billet Technology Diesel Oil Catch Can
Key Features:
Capacity: 10 oz.
Material: Billet aluminum
Design: Multi-stage filtration
Finish: Custom colors
Billet Technology has built a reputation for producing high-performance parts, and their diesel oil catch can continues this tradition. Featuring a multi-stage filtration system, this catch can ensures that oil vapor and contaminants are effectively separated from the engine’s intake system. The durable billet aluminum construction is available in several custom colors, allowing you to match it to your engine bay’s aesthetic.
The 10 oz. capacity is ideal for long trips or heavy-duty applications, and the easy-to-remove lid makes maintenance a breeze. The catch can is also equipped with a drain valve for easy oil disposal.
Why It Stands Out:
Billet Technology’s multi-stage filtration system offers excellent oil separation, making it one of the most effective catch cans available. The customizable colors also add a touch of personality to your engine.
5. K&N Diesel Oil Catch Can
Key Features:
Capacity: 7 oz.
Material: Aluminum
Design: Dual filtration (mesh and foam)
Finish: Polished aluminum
K&N is a brand synonymous with high-performance air filters, and their diesel oil catch can is no different. The K&N catch can features dual filtration, with both mesh and foam filters, to ensure efficient separation of oil vapors. It’s made from polished aluminum, providing both durability and a stylish appearance.
This catch can is compact and easy to install, with a simple mounting bracket included in the kit. Its 7 oz. capacity is ideal for smaller engines or vehicles that see lighter use.
Why It Stands Out:
The K&N Diesel Oil Catch Can is known for its efficient filtration and compact design. It’s a reliable choice for diesel drivers looking for quality without sacrificing space in the engine bay.
6. Killer B Motorsport Diesel Oil Catch Can
Key Features:
Capacity: 15 oz.
Material: T-6 billet aluminum
Design: Triple-layer filtration
Finish: Black anodized
Killer B Motorsport’s Diesel Oil Catch Can is designed for those who need top-tier performance and durability. Constructed from T-6 billet aluminum, it’s built to withstand the harshest conditions. The triple-layer filtration system ensures optimal oil and vapor separation, providing superior protection for your engine.
This catch can is larger than most, with a 15 oz. capacity, making it perfect for high-output diesel engines or those that see a lot of heavy towing. The black anodized finish ensures resistance to corrosion and adds a sleek look to the engine bay.
Why It Stands Out:
The Killer B Motorsport catch can’s triple-layer filtration system offers the highest level of oil vapor separation, making it a top contender for serious diesel enthusiasts. Its robust build quality and large capacity make it ideal for performance and heavy-duty applications.
7. Bully Dog Diesel Oil Catch Can
Key Features:
Capacity: 10 oz.
Material: Cast aluminum
Design: Modular design with removable canister
Finish: Matte black
Bully Dog has made its name in the performance industry, and their diesel oil catch can is no exception. Featuring a modular design, the Bully Dog catch can allows for easy maintenance and cleaning. The removable canister makes emptying and servicing the unit a simple task, while the cast aluminum construction ensures durability.
The 10 oz. capacity is suitable for most diesel engines, and the matte black finish gives it a stealthy, understated look in the engine bay.
Why It Stands Out:
The modular design of the Bully Dog Diesel Oil Catch Can makes maintenance easier than with other models. Its durability and practical features make it a great choice for everyday diesel drivers.
Conclusion
Selecting the best diesel oil catch can for your vehicle depends on various factors, including engine size, usage, and your budget. Each of the seven catch cans mentioned here offers unique features designed to protect your engine and enhance its performance. Whether you’re looking for high-end performance, easy maintenance, or a budget-friendly solution, there’s a catch can that will meet your needs.
Remember, a well-maintained engine is a long-lasting engine, and investing in a quality diesel oil catch can is one of the best ways to ensure your engine runs smoothly for years to come.
Related Topics:
- How to Make Diesel Fuel from Animal Fat: A Comprehensive Guide
- Is Turbo Diesel More Fuel Efficient?
- What Temperature Does Diesel Fuel Gel?