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If you drive a Mazda CX-30 and want to reduce crankcase vapors from reaching the intake, adding an oil catch can can help preserve performance and longevity. Choosing the right Mazda CX-30 oil catch can matters because designs and fit differ, and a poor choice can complicate installation or provide minimal filtration benefit. This guide highlights our seven shortlisted options and explains the practical factors we evaluated, including build quality and ease of installation. Read on to see which features matter most when selecting a catch can for your CX-30.
Looking for other parts? See all Mazda CX-30 parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | BOMLING Billet Oil Catch Can Kit with Z-Bracket for 6.4 HEMI |  |
| Most Popular A crowd favorite that many people choose with confidence | SPEEDWOW Universal Baffled Oil Catch Can Kit, 300 mL |  |
| Best Quality Built to a higher standard if you want something more solid | EVIL ENERGY Air Oil Separator (Oil Catch Can) |  |
| Best Budget The cheapest option that still gets the job done reliably | AOCISKA Aluminum Baffled Oil Catch Can Kit, 300ml |  |
| Most Sold A high-volume bestseller chosen again and again | TEMSONE Universal 2-Port Aluminum 750ml Baffled Oil Catch Can with Breather Filter |  |
| Best Value for Money The sweet spot between price and what you get | RULLINE 350ml Universal Baffled Oil Catch Can (Aluminum) |  |
| Best Overall The best all-around choice for most situations | EVIL ENERGY Baffled 300ml Oil Catch Can with Breather Filter and 5ft NBR Hose Kit |  |
1. BOMLING Billet Oil Catch Can Kit with Z-Bracket for 6.4 HEMI
| Capacity | 0.12 Liters |
|---|---|
| Product Grade | Replacement Part |
| Fit Type | Vehicle Specific |
| Manufacturer | XUZHONG |
This billet catch can is designed to separate oil and vapor from crankcase ventilation and collect it in a small reservoir before it reaches the intake. It installs in place of PCV routing and uses a baffled chamber and diffuser to condense oil droplets so only cleaner air returns to the intake tract. The kit arrives with a new Z-bracket, billet hose ends, forged fittings, and cut-to-length hoses for a neat, engine-bay installation. In practical use the unit noticeably collects sludge over several thousand miles, reducing oil contamination of intake runners and throttle components. The 4 oz capacity keeps the can compact but means more frequent checks and emptying on engines that generate heavier blow-by. Fitment and accessory layout are tailored to 6.4 HEMI applications, so installation can require trimming or repositioning on other engines and the large factory engine cover may not be reusable. Build quality appears solid for aftermarket hardware, though the small reservoir and required hose trimming add some installation fiddliness for a reliability-focused owner.
Best for: Reliability-focused owners who prioritize protecting the intake and valves from oil contamination and prefer a factory-style add-on that collects blow-by before it reaches the intake.
Less Ideal for: Buyers who want a drop-in, vehicle-specific solution for the Mazda CX-30 with no modification or those who prefer large-capacity, maintenance-free catch systems.
- Baffled billet design and diffuser improve oil separation and reduce vapors entering the intake.
- Includes vehicle-specific Z-bracket, billet hose ends, and forged fittings for a tidy, secure install.
- Compact 4 oz reservoir fits tight engine bays and mounts in OEM locations on supported engines.
- Many users report measurable oil collection after routine mileage, indicating effective vapor capture.
- 4 oz capacity means more frequent draining on engines with heavy blow-by.
- Listed fitment targets 6.4 HEMI engines so it may not directly fit Mazda CX-30 without modification.
- Some hose fittings require trimming and careful assembly which adds install time and potential for missing small parts.
Verdict A compact, well-equipped billet catch can that effectively traps oil vapor for improved engine cleanliness but has a small reservoir and is built around HEMI fitment rather than Mazda-specific drop-in compatibility.
2. SPEEDWOW Universal Baffled Oil Catch Can Kit, 300 mL
| Fit Type | Universal Fit |
|---|---|
| Fuel Type | Gasoline |
| Item Weight | 2 pounds |
| Model | Reservoirs |
This SPEEDWOW catch can is a compact, reusable baffled reservoir designed to trap oil and moisture from the PCV/CCV flow before vapors reach the intake. It is typically installed in-line with the factory crankcase ventilation on vehicles like the Mazda CX-30 to reduce carbon buildup and keep intake ports cleaner. The can includes a removable baffle and a dipstick that doubles as a drain/suction port, a reusable bottom for easy emptying, hose clamps, aluminum mounting brackets, and a 3/8 inch NBR hose rated for oil resistance. Practical benefits include straightforward plumbing with supplied hose and fittings, visible fluid checks via the dipstick, and a small 300 mL capacity that fits tight engine bays. Important limitations are the universal fit approach which may require extra adapters or a custom bracket for neat CX-30 routing, the included clamps and bracket are light and some installers upgrade them, and the small reservoir can require more frequent draining in heavy use or cold, wet climates where condensation can accumulate and freeze if not checked.
Best for: Convenience-driven owners who want an easy, mostly complete kit to add basic crankcase filtration and reduce intake contamination with minimal parts sourcing or fabrication.
Less Ideal for: Users seeking a vehicle-specific, heavy-duty solution for high-horsepower or track-driven CX-30 builds should consider purpose-built, larger-capacity catch cans and sturdier mounting kits.
- Baffled internal design and removable baffle improve oil and moisture separation before air returns to the intake.
- Dipstick and removable bottom make it easy to monitor and drain collected fluid without removing the unit.
- Includes hoses, clamps, Teflon tape, and mounting hardware for a faster install in many engine bays.
- 3/8 inch NBR hose provided offers good oil and heat resistance out of the box.
- Universal kit may need additional fittings or a custom bracket to fit neatly in the CX-30 engine bay.
- Included clamps and mounting bracket are lightweight and some users replace them with stronger hardware.
- Small 300 mL capacity means more frequent checks and emptying under heavy blow-by conditions.
Verdict A compact, convenience-oriented universal catch can kit that installs quickly but may need minor hardware upgrades for a tidy Mazda CX-30 installation.
3. EVIL ENERGY Air Oil Separator (Oil Catch Can)
| Fitment note | Installs on PCV side of engine |
|---|---|
| Compatible engines | Designed for V8 5.3L and 6.2L fitments (listed) |
This EVIL ENERGY air oil separator is a small catch can designed to intercept oil vapor on the PCV side of the engine. It uses a fine mesh aluminum filter to trap condensate and comes with hoses, brackets, fittings, and installation instructions for a direct-fit style replacement. In practice the unit installs with basic hand tools and is intended to reduce oil buildup in the intake tract, which helps maintain cleaner intake ports and combustion over time. Users report modest collection volumes after the first few hundred miles and a secure mount and o-ring sealing. The reservoir is compact so it requires regular checks and draining, and some buyers noted the supplied plastic hose fittings may become brittle under long-term heat exposure and could be upgraded. For a performance-oriented buyer the can offers good filtration and straightforward installation, but expect to service it frequently and consider replacing the factory hoses or fittings for maximum durability if your driving includes hard use or high underhood temperatures.
Best for: A performance-oriented owner who prioritizes protecting intake and combustion efficiency and is willing to perform regular maintenance to keep the engine clean.
Less Ideal for: Drivers seeking a maintenance-free or large-capacity solution should consider larger or serviced designs that need less frequent attention.
- Fine mesh aluminum filter captures fine oil vapor to reduce intake contamination
- Includes hoses, custom brackets and fittings for straightforward installation
- Compact, machined reservoir and secure mounting hardware provide a tidy underhood fit
- Small reservoir requires frequent checking and draining
- Some supplied hose fittings are plastic and may degrade faster in high heat
Verdict A compact, performance-minded catch can that keeps intake deposits down but needs frequent draining and occasional hose upgrades.
4. AOCISKA Aluminum Baffled Oil Catch Can Kit, 300ml
| Capacity | 300 Milliliters |
|---|---|
| Material | Aluminum |
| Fit Type | Universal |
| Product Grade | like new |
This aluminum baffled catch can collects oil and condensation from the crankcase ventilation stream to help keep the intake tract and intake valves cleaner. It is a 300ml reservoir with a removable bottom for draining and a built-in dipstick to check fluid level, and the internal baffle can be rotated or removed; adding steel shot is supported to improve condensation capture. Typical installation uses the included hoses and fittings to route PCV/CCV ventilation into the can, then return filtered gases to the intake. The aluminum construction promises corrosion resistance and durability for everyday driving. Because this is a universal kit it does not come with a vehicle-specific bracket, so expect some fabrication or a separate mounting bracket for a Mazda CX-30. Assembly and correct orientation of the internal screen matter for performance, and low-temperature operation can concentrate water in the can so it needs more frequent draining in cold climates. For CX-30 owners wanting a low-cost way to reduce oil blow-by into the intake, this offers solid performance if you can adapt the mounting and hose routing.
Best for: Budget-conscious Mazda CX-30 owners who want a low-cost, functional way to reduce intake oil contamination without paying for a vehicle-specific branded unit.
Less Ideal for: Drivers who want a plug-and-play, vehicle-specific install with factory-quality mounting hardware or those who prefer a very large-capacity catch can for extended service intervals.
- Baffled design and optional steel shot increase oil separation efficiency
- Aluminum body is durable and corrosion resistant for engine bay use
- Removable base and dipstick make draining and level checks straightforward
- Comes with basic hose kit so you can route PCV/CCV lines without sourcing all parts separately
- Universal fit requires fabricating or buying a separate mount for a Mazda CX-30
- 300ml capacity needs regular checks on high-mileage or oil-consuming engines
Verdict A low-cost, aluminum baffled catch can that works well on a Mazda CX-30 if you are willing to fabricate or add mounting hardware and check it regularly.
5. TEMSONE Universal 2-Port Aluminum 750ml Baffled Oil Catch Can with Breather Filter
| Fit Type | Universal |
|---|---|
| Manufacturer | TEMSONE |
| Capacity | 750 ml |
| Material | Aluminum |
This TEMSONE catch can is a straightforward, budget-friendly way to reduce oil and vapor recirculation into the intake on a Mazda CX-30. It uses a baffled internal path and a brass screen/breather to separate condensate and droplets, collecting them in a 750 ml aluminum reservoir that is easy to inspect and clean. The kit arrives with a drain valve for convenient emptying, hose connectors and a breather filter so you can install it as an open or closed system depending on your CX-30 setup. Aluminum construction resists corrosion and feels durable for under-hood use. Expect simpler installation for common CX-30 PCV routing, but you may need to source CX-30 compatible hose and mounting hardware since only basic fittings are included. A few users found the internal screen restrictive on some turbo engines, so confirm clearance and flow on your vehicle before finalizing plumbing. For a risk-averse buyer looking to protect a CX-30 engine from carbon and oil fouling, this is a practical, low-cost option with the usual need to adapt hoses and mount points.
Best for: A risk-averse mainstream buyer who prioritizes protecting engine longevity on a Mazda CX-30 and prefers a simple, proven add-on rather than performance modifications.
Less Ideal for: Drivers seeking a plug-and-play CX-30 specific kit with all hoses and brackets included or those who want a high-capacity, race-oriented catch can for extreme track use.
- Large 750 ml capacity reduces frequency of draining
- Baffled internal design and breather filter help separate oil and moisture
- Aluminum body resists corrosion and feels sturdy
- Includes drain valve and multiple hose connectors for easier servicing
- Hoses and vehicle-specific mounting hardware are not included
- Brass screen can be overly restrictive on some applications, requiring modification
Verdict A durable, budget-friendly universal catch can that will help protect a Mazda CX-30 from oil vapors if you are willing to supply hoses and a mount point.
6. RULLINE 350ml Universal Baffled Oil Catch Can (Aluminum)
| Capacity | 350 Milliliters |
|---|---|
| Fuel Type | Gasoline |
| Product Grade | Performance Part |
| Fit Type | Universal |
This RULLINE 350ml catch can is a simple, universal oil separator designed to intercept oil and moisture from the PCV/CCV stream before it reaches the intake. It mounts under the hood and connects inline with the ventilation hoses; the internal baffle and screw-on sump collect condensate and heavier oil so you can empty it periodically. The can is CNC-style aluminum with full TIG welds and includes a threaded dipstick for a quick fluid check, braided hose, and three adapter fittings to help match common hose sizes. Practical benefits are clear for routine maintenance: it reduces carbon and sludge buildup in the intake tract, is lightweight and corrosion resistant, and the braided hose and O-ring seals aim to limit leaks. Limitations include its universal fit approach which may require custom mounting and hose adaptations for a Mazda CX-30, and the provided mounting bracket and small hose clamps are modest quality so expect to substitute hardware for a neat OEM-like install. The 350ml capacity keeps the can compact but means more frequent checks on cars that produce heavier crankcase condensation.
Best for: Practical optimizers who prioritize reducing intake carbon buildup on a Mazda CX-30 without spending on a vehicle-specific kit, and who are comfortable making simple mounting or hose adjustments.
Less Ideal for: Buyers seeking a plug-and-play, vehicle-specific catch can with factory-style mounting and hardware should consider a CX-30–specific kit instead.
- Baffled aluminum reservoir with full TIG welds for corrosion resistance and durability.
- Includes threaded dipstick for quick fluid level checks without disassembly.
- Comes with braided hose and multiple adapter fittings to match common ventilation lines.
- Compact 350ml capacity fits tight engine bays while still providing meaningful oil separation.
- Universal design can require custom brackets or hose changes for a clean fit in the CX-30.
- Included hose clamps and mounting bracket are basic and may need replacement for long-term reliability.
Verdict A compact, well-made universal catch can that delivers strong value for CX-30 owners willing to do light custom mounting and hose work.
7. EVIL ENERGY Baffled 300ml Oil Catch Can with Breather Filter and 5ft NBR Hose Kit
| Capacity | 300ML |
|---|---|
| Hose ID | 3/8" |
| Hose length | 5 ft |
| Thread | M16×1.5 |
This EVIL ENERGY catch can is a compact, baffled separator designed to intercept oil and water vapors before they reach the intake tract. It installs inline with PCV hoses or as a vented breather for pre-PCV setups and includes a removable baffle and stainless wool to improve trapping efficiency. The kit comes with a 5 ft NBR hose (3/8" ID), fittings with M16x1.5 threads, mounting bracket, dipstick and basic hardware, so most installations are straightforward in a small-engine bay. Practical benefits include reduced intake valve gunk and less carbon buildup, which can help maintain throttle response and long-term engine cleanliness. Limitations to note are the 300ml capacity that requires periodic draining, the supplied hose clamps may be low quality, and some users needed a longer or larger-diameter hose for certain layouts. Also, in freezing conditions the kit can collect moisture that risks freezing if not maintained. For a balanced buyer this offers strong functionality and value but needs routine checks to perform optimally.
Best for: A balanced all-round buyer who wants a practical, value-oriented upgrade to reduce intake contamination on a daily-driven Mazda CX-30 and is willing to perform periodic maintenance.
Less Ideal for: Drivers seeking a zero-maintenance or large-capacity solution for heavy-duty or high-mileage forced-induction builds should consider larger or vehicle-specific systems.
- Baffled design with removable baffle and stainless wool improves oil and moisture separation.
- Includes a 5 ft NBR hose and fittings with M16x1.5 thread for secure connections.
- Complete kit elements like bracket and dipstick make most installs possible without extra parts.
- Breather filter option allows use as a vented system for non-PCV setups.
- 300ml capacity requires frequent emptying on engines with high blow-by.
- Included hose clamps have inconsistent quality and may need replacement.
- Some installations require a longer or larger-diameter hose than supplied.
Verdict A compact, well-equipped baffled catch can that gives Mazda CX-30 owners affordable protection against intake oil contamination, provided you maintain it regularly.
Choosing the Right Mazda CX-30 Oil Catch Can: Key Factors to Consider
Construction and Materials
The materials used determine durability and how well the catch can resists corrosion and heat. Aluminum and stainless steel are common because they tolerate engine-bay temperatures and resist chemical degradation from oil vapor. A well-sealed body and robust fittings reduce the chance of leaks and ensure consistent pressure behavior.
Material choice also affects weight and mounting options. Lighter materials are easier to support with small brackets, while heavier builds may need sturdier mounting. Also consider finish and machining quality since a precise fit between ports and hoses improves sealing and reliability over time.
Internal Baffle and Filtration Design
The internal baffle or filtration medium governs how effectively the unit separates oil from vapor. Multi-stage baffles, mesh screens, or coalescing media increase the chance that oil droplets coalesce and drain, rather than passing back into the intake.
Baffle geometry influences how often you need to service the can. Simple single-chamber designs may require more frequent draining, while well-designed multi-stage systems hold more contaminant and maintain separation efficiency for longer intervals.
Fitment and Mounting for the CX-30
A catch can that fits the CX-30 without major modifications saves time and reduces installation risk. Consider the location of available mounting points, clearance to engine components, and routing of PCV and intake hoses. A purpose-fit kit or a can with versatile bracketry will more easily accommodate the CX-30 engine bay layout.
Good fitment also minimizes stress on hoses and fittings. If hoses must bend sharply or routing places them near hot surfaces, long-term reliability may suffer. Choose a placement that allows easy access for draining and inspection.
Hose and Port Size Compatibility
Matching inlet and outlet port diameters to the CX-30's PCV and intake lines preserves proper flow and prevents unnecessary backpressure. Undersized ports can restrict crankcase ventilation and create unwanted vacuum changes, while oversized adapters can introduce leaks if not secured properly.
Check whether the unit includes common hose adapters and clamps. A kit that supplies multiple fittings reduces the need for aftermarket parts and helps achieve a reliable, leak-free connection.
Ease of Installation
Installation complexity affects whether you can fit the can yourself or need professional help. Simple bolt-on kits with clear instructions and preformed hoses are faster to install and reduce potential mistakes. Consider whether the kit requires moving other components or drilling; those steps increase labor and introduce risk.
Also weigh how the installation affects future service tasks like oil changes. A can that blocks routine access to filters or dipsticks can add time and annoyance to regular maintenance.
Serviceability and Maintenance Access
Regular draining and occasional cleaning are part of owning a catch can. Look for easy-access drain plugs, transparent sight tubes or windows, and simple removal for deeper cleaning. A can that requires disassembly in tight spaces makes routine service more time-consuming.
Maintenance frequency depends on driving style and engine condition, so prioritize designs that make inspection and draining straightforward. Clear markings or graduated reservoirs can help you track how quickly contaminants accumulate.
FAQ
What does an oil catch can do on a Mazda CX-30?
An oil catch can captures oil droplets and other contaminants from crankcase ventilation before they reach the intake tract. This reduces buildup on intake valves and sensors and can help maintain consistent combustion behavior over time. The effect is more noticeable on engines with direct injection or turbocharging where valve deposits accumulate more rapidly.
Will installing a catch can affect engine performance?
A correctly sized and properly installed catch can normally has minimal impact on engine performance. Problems arise if ports are undersized or hoses are routed improperly, which can alter crankcase pressure. Using appropriate fittings and ensuring leak-free connections helps maintain normal ventilation behavior.
How often should I service a catch can on the CX-30?
Service intervals vary based on driving conditions and engine health, but many owners inspect the can every oil change and drain it when significant fluid accumulates. Heavy short-trip driving or spirited use can increase accumulation rate, so check more frequently if you notice faster buildup.
Is installation difficult for someone with basic tools?
Many catch can kits are designed for DIY installation and include brackets, hoses, and fittings. If the kit fits the CX-30 layout and includes clear instructions, someone comfortable with basic hand tools can usually complete the job. Complex routing, tight clearances, or required modifications increase difficulty and may warrant professional help.
Does a catch can require modifications to the PCV system?
Most catch cans use bolt-on connections to the existing PCV and intake hoses and do not require permanent modifications. Some installations may need minor bracket adjustments or temporary hose rerouting. Avoid options that require cutting factory components or permanent alteration unless you are prepared for those changes.
How We Chose the Best Mazda CX-30 Oil Catch Can
We started by focusing on components and fitment that matter specifically to the Mazda CX-30. Key evaluation criteria included construction materials and baffle design to assess contaminant separation, compatibility with the CX-30 engine plumbing and mounting points to minimize modification, and inlet/outlet port sizing to ensure proper flow without increasing crankcase pressure. We also tested installation complexity on typical CX-30 layouts, checking whether a catch can kit included necessary hoses and brackets, and reviewed maintenance access for routine draining and cleaning. Noise and vacuum effects were considered to avoid adverse engine response. Exclusions applied to units that required irreversible cutting or major engine changes, bespoke fabrication beyond simple bracket modifications, or lacked clear serviceability. The resulting shortlist contains products that balance separation effectiveness, fitment simplicity, durable materials, and manageable maintenance for the CX-30 owner.
Our full evaluation process is outlined in our review methodology.
Conclusion
Picking the right Mazda CX-30 oil catch can means balancing separation effectiveness, fitment simplicity, and ease of maintenance. Prioritize a durable construction and an internal design that reliably captures oil without restricting ventilation. Also consider how the can mounts and whether it permits easy draining and inspections. Accept tradeoffs such as slightly larger footprint for better capacity or a few extra fittings for improved sealing. Focus on a solution that fits the CX-30 engine bay, uses proper hose sizes, and keeps routine service straightforward.
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