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If you drive a Scion xB, controlling crankcase vapors can help keep the intake tract and valves cleaner over time. Choosing the right catch can for your vehicle helps limit oil and carbon buildup that can reduce performance and complicate maintenance. This guide presents seven shortlisted Scion xB oil catch can options that fit this model and balance filtration effectiveness, installation complexity, and durability. We evaluated each option for fitment, mounting ease, filtration type, and maintenance needs to help you pick the right solution for your driving habits and mechanical comfort.
Looking for other parts? See all Scion xB parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Bomling 350ml Aluminum Baffled Oil Catch Can Kit |  |
| Most Popular A crowd favorite that many people choose with confidence | RULLINE 2-Pack 350ml Universal Baffled Oil Catch Can |  |
| Best Quality Built to a higher standard if you want something more solid | POSENG AN10 1.2L Twin-Baffle Dual-Filter Oil Catch Can |  |
| Best Budget The cheapest option that still gets the job done reliably | ZNDAW 2-Port Billet Aluminum 150ml Oil Catch Can Kit |  |
| Most Sold A high-volume bestseller chosen again and again | EVIL ENERGY 10AN 750ml Oil Catch Can with 10ft Nylon-Braided Fuel Hose Kit |  |
| Best Value for Money The sweet spot between price and what you get | TEMSONE Universal 2-Port Aluminum 750ml Baffled Oil Catch Can with Breather Filter and Drain Valve |  |
| Best Overall The best all-around choice for most situations | EVIL ENERGY 300ml Baffled Oil Catch Can with 5ft NBR Hose Kit |  |
1. Bomling 350ml Aluminum Baffled Oil Catch Can Kit
| Capacity | 350ml |
|---|---|
| Material | 0046 Aluminum |
| Ports | 2-Port |
| Mounting | Universal kit with multiple fittings |
This Bomling 350ml oil catch can is a compact, universal kit that traps oil and moisture from the PCV/CCV system before it reaches the intake. It installs inline with the ventilation hose and uses internal baffling plus supplied stainless steel wool to condense and collect oil in the reservoir; a threaded dipstick in the lid makes level checks simple. The can is machined from 0046 aluminum and fully TIG welded, which gives it a durable, corrosion-resistant housing that looks more expensive than the price suggests. The kit includes multiple fittings and basic hose, though several users replace the supplied hose and O-rings with higher-quality parts for long-term reliability. Capacity is modest at 350ml so it requires periodic draining depending on driving and engine condition. For Scion xB owners this catch can provides a straightforward way to reduce intake contamination, but expect to fit better hoses and seals during installation for the most reliable result.
Best for: Reliability-focused buyers who prioritize engine cleanliness and long-term intake protection for their Scion xB and are willing to do a modest amount of installation tuning to ensure leak-free operation.
Less Ideal for: Drivers who want a completely maintenance-free, factory-integrated solution or those unwilling to replace included basic hardware during installation should consider a higher-end, vehicle-specific unit.
- Baffled internal design with stainless steel wool to improve oil separation
- Machined 0046 aluminum body and TIG welds for durability and corrosion resistance
- Includes fittings, thread seal tape, and a dipstick for convenient fluid checks
- Compact 350ml reservoir fits easily in tight engine bays
- Supplied rubber hose and some O-rings are low quality and often replaced by users
- 350ml capacity may need frequent emptying on higher-mileage or high-boost engines
Verdict A budget-friendly, machined aluminum catch can that improves intake cleanliness for the Scion xB if you upgrade the included hose and seals for long-term reliability.
2. RULLINE 2-Pack 350ml Universal Baffled Oil Catch Can
| Capacity | 350 Milliliters |
|---|---|
| Product Grade | Performance Part |
| Fit Type | Universal |
| Fuel Type | oil |
These RULLINE catch cans collect oil and emulsified moisture from PCV/CCV lines before vapors re-enter the intake, helping reduce carbon buildup in the throttle body and intake tract. They are supplied as a two-pack with three adapter fittings, a dipstick for level checks, and braided hose, which makes routing and installation straightforward for most DIYers. The cans are fully TIG welded, anodized aluminum for corrosion resistance and include an O-ring sealed screw cup to minimize leaks. Practical benefits include a visible dipstick for easy inspection and a compact 350ml capacity that suits tight engine bays. Limitations to consider are the universal fit approach that may require custom mounting or replacing the supplied hose/clamps to match Scion xB PCV and intake fittings, and the relatively small capacity which means more frequent draining on oilier engines. The kit does not include vehicle-specific brackets or instructions for the Scion xB so expect some fabrication and hose-size matching during install.
Best for: Drivers who prioritize convenience and straightforward upgrades to reduce intake contamination and want a mostly ready-to-install, do-it-yourself solution that minimizes maintenance effort.
Less Ideal for: Owners who want a vehicle-specific, bolt-on kit with exact-fit brackets and hoses or those who prefer a lifetime maintenance-free solution with larger capacity.
- Two-piece kit gives a spare or lets you fit separate PCV and crankcase lines independently
- Baffled aluminum cans are TIG welded and anodized to resist corrosion and leaks
- Includes three adapter fittings and braided hose to help match common vacuum line sizes
- Removable screw-on cup with O-ring and dipstick allows easy inspection and draining
- Universal kit requires custom mounting and possibly different hose diameters for a clean Scion xB install
- 350ml capacity can fill faster on higher-mileage or oil-burning engines, requiring frequent checks
Verdict A convenient, compact universal catch can kit that works well for DIY Scion xB owners but needs minor custom fitting and more frequent draining than larger, vehicle-specific units.
3. POSENG AN10 1.2L Twin-Baffle Dual-Filter Oil Catch Can
| Capacity | 1.2 Liters |
|---|---|
| Hose Fitting Size | AN10 |
| Material | Aluminum |
| Includes | Two breather filters and petcock drainer |
This POSENG catch can is a large-capacity, twin-baffle oil separator built from TIG-welded aluminum and fitted with two high-flow breather filters and AN10 hose adapters. It is typically mounted in the engine bay or on a frame rail and plumbed to valve cover vents or PCV outlets to capture oil mist and condensate before it reaches the intake tract. The internal dual baffles reduce oil carryover while the twin filter design vents trapped gases to atmosphere when desired. Practical benefits for a performance build include greater capacity for extended service intervals, easier visible draining via the petcock, and the ability to accept two vent sources for engines with separate valve cover ports. Limitations are its bulky size which can complicate tight engine bays like the Scion xB and the unit uses external breather filters rather than a closed-loop oil return, so it vents to atmosphere which may not suit all emissions-conscious builds. Fitment planning and secure mounting are important before installation.
Best for: Performance-oriented owners seeking a high-capacity, heavy-duty catch can to protect intake valves and turbochargers during spirited driving and tuning work.
Less Ideal for: Owners who need a compact, stealthy closed-loop solution or who must maintain a factory-vented emissions setup should consider smaller or closed systems instead.
- Large 1.2L capacity reduces frequency of draining for high-flow or turbocharged applications
- Twin internal baffles and dual breathers help separate and trap oil mist more effectively than single-can designs
- AN10 hose fittings and TIG-welded aluminum construction provide robust connections and durable assembly
- Open breather filters vent to atmosphere rather than routing crankcase vapors back into the intake
- Relatively bulky body can be difficult to locate and secure in compact engine bays
- Some customers report thinner material gauge and a basic drain petcock compared with higher-end catch cans
Verdict A high-capacity, dual-baffle catch can built for performance engines, but its open breather design and bulky size mean careful fitment planning is required for a Scion xB.
4. ZNDAW 2-Port Billet Aluminum 150ml Oil Catch Can Kit
| Capacity | 5 Fluid Ounces |
|---|---|
| Material | Aluminum |
| Fit Type | Universal |
| Includes | Breather filter, drain valve, 5 adapters, O-rings |
This ZNDAW catch can collects blow-by oil and moisture before they reach the intake, helping reduce carbon and sludge buildup in the engine. It installs inline with the PCV or crankcase breather using one of the included adapters and uses internal baffling plus a breather filter to separate and trap oil in its 150 ml reservoir. The kit ships with a drain valve for quick oil removal, a clamp, O-rings, and mounting screws so you can fit and service it without modifying the tank. Built from aluminum it resists corrosion and handles elevated under-hood temperatures better than plastic units. The compact size makes packaging on tight Scion xB engine bays straightforward, but the smaller 150 ml capacity means it needs more frequent checks on higher-mileage or heavy-duty use. Also the universal adapter selection helps fit many lines but may require trial-and-error to pick the proper connection for specific engines.
Best for: Budget-conscious Scion xB owners who want a low-cost, durable catch can to reduce intake contamination without a complex install or major engine changes.
Less Ideal for: Drivers planning long track sessions, heavy towing, or who prefer a maintenance-free large-capacity solution should consider larger, vehicle-specific catch cans instead.
- Billet aluminum construction offers better heat and corrosion resistance than plastic alternatives.
- Includes breather filter, drain valve, multiple adapters, clamps, and O-rings for a near-complete installation kit.
- Compact 150 ml reservoir fits tight engine bays and is easy to route and mount.
- Drain valve lets you empty the can without disassembly for faster maintenance.
- 150 ml capacity is small so it will require more frequent draining on engines that produce heavier blow-by.
- Universal adapters may not perfectly match every factory line and can need additional fittings or trimming.
Verdict A low-cost, compact aluminum catch can that suits Scion xB owners wanting basic crankcase oil separation but requires more frequent draining due to its small 150 ml reservoir.
5. EVIL ENERGY 10AN 750ml Oil Catch Can with 10ft Nylon-Braided Fuel Hose Kit
| Capacity | 750ml |
|---|---|
| Hose length | 10 ft |
| Hose inner diameter | 0.56 in (14.22 mm) |
| Working pressure | 500 PSI |
| Operating temperature | -40°F to 257°F |
This EVIL ENERGY kit is a budget-friendly, universal oil catch can package built around a 750ml aluminum canister with a bottom drain valve and AN10 fittings. It is typically used inline with crankcase or PCV ventilation to capture oil and condensate before those vapors reach the intake, helping reduce intake valve and intake tract gunk. The kit includes a 10 foot nylon-braided CPE hose rated for high pressure, swivel AN hose ends for easier routing, and an optional breather filter for vented installations. Practical benefits include a convenient drain valve for simple servicing, solid-looking fittings that simplify sealing, and a large can capacity that means less frequent emptying. Limitations to expect are variable build fitment because this is a universal kit so some mock-up and trimming may be needed for clean installation on specific engines, and the internal baffling/filtering is basic compared with higher-end canisters. Some customers also report occasional missing parts or alignment issues with the mounting tab, so check the kit before installation.
Best for: A risk-averse mainstream buyer who wants a practical, cost-conscious upgrade to reduce intake oil contamination on their Scion xB without paying for an expensive specialty canister; they prioritize straightforward servicing and proven function over boutique features.
Less Ideal for: Not for buyers seeking a plug-and-play, vehicle-specific engineered solution or those who need the highest-efficiency multi-stage filtration for high-performance engines.
- Generous 750ml capacity reduces how often you need to empty the can.
- Bottom drain valve allows fast, clean servicing without disassembly.
- Includes 10ft nylon-braided CPE hose and swivel AN fittings for flexible routing.
- Aluminum construction and threaded joints with O-ring gaskets provide a durable, leak-resistant assembly.
- Universal design may require hose trimming or creative mounting to fit specific engine bays.
- Baffling/filter element is basic compared with premium catch cans, limiting filtration efficiency.
- Some users report inconsistent kit completeness and crooked mounting tab on arrival.
Verdict A cost-conscious, service-friendly catch can kit that works well to reduce crankcase oil blow-by on a Scion xB but requires fitment care and has only basic internal filtration.
6. TEMSONE Universal 2-Port Aluminum 750ml Baffled Oil Catch Can with Breather Filter and Drain Valve
| Fit Type | Universal |
|---|---|
| Manufacturer | TEMSONE |
| Capacity | 750 ml |
| Material | Aluminum |
This TEMSONE catch can captures oil and moisture from the PCV/CCV circuit to reduce carbon buildup in the intake. It is typically mounted inline between the crankcase ventilation port and the intake or breather, using the supplied fittings and hose clamps; installation on a Scion xB requires routing a short section of hose to the PCV and a secure bracket. Notable features include a baffled internal design to help separate liquids, a 750 ml aluminum reservoir that is corrosion resistant, a threaded drain valve for easy emptying, and an included breather filter for open-vent installs. In practice the large capacity reduces how often you need to check or drain the can and the metal body stands up well to engine bay heat. Limitations are that hoses are not included, some buyers report a restrictive internal brass screen on certain engines, and universal fitment means you will need to confirm clearances and may need adapters for factory fittings. For a practical optimizer on a Scion xB this offers a durable, lower-cost way to cut oil vapors returning to the intake, but plan for a short installation and minor tailoring to the xB's PCV plumbing.
Best for: A practical optimizer who wants an affordable, durable way to reduce oil vapors and slow carbon buildup on a Scion xB without paying for a vehicle-specific kit.
Less Ideal for: Drivers who want a completely plug-and-play, vehicle-specific kit with hoses and custom brackets included should consider a Scion-specific system instead.
- Large 750 ml aluminum reservoir reduces frequency of draining
- Baffled internal design and breather filter help separate and trap oil/vapor
- Threaded drain valve makes routine emptying quick and clean
- Durable aluminum construction resists corrosion and engine-bay heat
- Does not include hoses so additional parts are required for installation
- Universal fittings may need adapters or Teflon tape to seal on some PCV ports
- Some units reported a restrictive internal screen that may need modification
Verdict A tough, budget-friendly catch can with a large 750 ml tank that works well for Scion xB owners willing to source hoses and do a modest install themselves.
7. EVIL ENERGY 300ml Baffled Oil Catch Can with 5ft NBR Hose Kit
| Capacity | 300 Milliliters |
|---|---|
| Hose length | 5 ft (1.5 m) |
| Hose inner diameter | 3/8" |
| Thread size | M16×1.5 |
This EVIL ENERGY catch can is a compact, universal kit that separates oil vapor and moisture from PCV/CCV ventilation before those contaminants reach the intake. It is typically mounted in the engine bay inline with PCV hoses or used as a breather on pre-PCV setups; the kit includes a removable internal baffle and steel wool to improve coalescing, a threaded cap with O-ring, and a 5ft NBR hose and clamps for routing. In practice the can collects noticeable oil residue and keeps intake components cleaner, which helps reduce carbon buildup and preserve throttle body and valve condition. Installation is straightforward for a DIYer, though some users replace or extend the supplied hose for cleaner routing and may need different fittings for exact Scion xB connections. The 300ml size is small enough to tuck into tight spaces but large enough that you will not be emptying it constantly. Be mindful in very cold climates where moisture can freeze and check the can regularly to avoid blockages.
Best for: Balanced buyers who want a practical, value-oriented protection upgrade to reduce intake contamination and extend engine life on their Scion xB without committing to an expensive performance-only part.
Less Ideal for: Drivers who need a vehicle-specific plug-and-play kit with exact factory-matching fittings or who prefer professional installation included with the product.
- Baffled internal design with supplied steel wool improves oil separation and reduces intake contamination.
- Solid aluminum construction and tightened fittings give a durable, premium feel for the price.
- Includes 5ft NBR hose and clamps so the kit is ready to install on many engine bays.
- 300ml capacity balances compact mounting with useful volume so it does not require constant emptying.
- Hoses and fittings are universal and may require purchasing different hose diameter or extra clamps for a clean Scion xB install.
- O-ring on the cap can be tight to fit and requires care when reinstalling to avoid damage.
- In freezing temperatures moisture can accumulate and potentially freeze, requiring more frequent maintenance.
Verdict A well-made, compact baffled catch can that offers strong value and effective oil separation for Scion xB owners willing to adapt hose fittings for a tidy install.
Choosing the Right Scion xB Oil Catch Can: Key Factors to Consider
Fitment and Compatibility
Correct fitment matters because available engine bay space on the Scion xB is limited and mounting points vary. A catch can designed for this model reduces the need for custom brackets or rerouted hoses. Proper compatibility also ensures the hoses reach the PCV and intake ports without undue stress, which lowers the risk of leaks or premature hose failure.
When a unit fits well, installation time and complexity drop, and the can sits clear of heat sources and moving parts. That placement helps preserve hose and clamp integrity and makes visual inspection easier during routine maintenance.
Filtration Method and Efficiency
Different catch cans use baffling, mesh, or filter elements to separate oil droplets from blow-by gases. The chosen method affects how effectively the device captures condensate versus letting fine aerosol pass into the intake. Higher separation efficiency reduces oil accumulation in the intake tract and on valves, which can improve long-term engine cleanliness.
Consider whether a design is optimized for heavy short-trip city driving or for sustained highway operation, since condensation and blow-by characteristics vary with duty cycle. Also check if the internal media is serviceable or if it loses effectiveness over time.
Reservoir Capacity and Drainage
Reservoir volume determines how often you must empty the can and how it handles prolonged operation before maintenance. Smaller canisters may require frequent checks, while larger reservoirs increase service intervals but add weight and bulk.
Drain access and valve quality matter for clean, spill-free maintenance. A well-placed drain or quick-disconnect fitting simplifies servicing in tight spaces, and a clear sight window or level indicator helps you monitor fill without disassembly.
Materials and Corrosion Resistance
Catch cans operate in a hot, moist, and chemically active environment. Corrosion-resistant materials such as anodized aluminum or stainless steel and durable seals extend service life and reduce the chance of leaks. Nonmetallic elements must withstand oil exposure and engine bay temperatures without deforming or cracking.
Pay attention to thread and seal quality on removable parts. Durable finishes and robust hardware reduce the likelihood of seizing or failure during routine maintenance.
Mounting Hardware and Installation Complexity
Mounting options range from vehicle-specific brackets to universal clamps. For the Scion xB, vehicle-specific mounting hardware minimizes fabrication and ensures secure placement away from hot or moving components. Installation complexity affects whether you can do the job in a driveway or need professional help.
Check the length and quality of included hoses and clamps. Clear instructions and labeled hardware speed up installation and reduce the chance of misrouting or improper hose connections that could cause leaks.
Maintenance Requirements and Accessibility
Routine maintenance involves draining and sometimes cleaning the internal filter or baffle. Accessibility of the installed can determines how often owners will perform these tasks. If the can is hard to reach, maintenance may be neglected, reducing effectiveness.
Consider whether replacement parts or service elements are available and whether the design allows quick inspection. Units that require simple hand tools and minimal disassembly encourage consistent upkeep.
FAQ
Do I need a catch can on my Scion xB?
A catch can can help reduce oil and condensate entering the intake system, which is especially useful if you notice oil residues or frequent intake cleaning needs. Whether it is necessary depends on your driving patterns and maintenance tolerance. For drivers who do many short trips and want to limit buildup, a catch can often reduces long-term maintenance.
How often should I empty the catch can?
Drain frequency depends on driving style and reservoir size. Short, stop-and-go trips typically produce more condensate and may require checking monthly, while highway driving often extends that interval. Inspect the can regularly at first to establish a personalized schedule and look for a visible fill indicator if available.
Will installing a catch can affect engine performance?
A properly installed catch can should not adversely affect engine operation. Its purpose is to trap oil-laden vapors before they reach the intake. Installation must preserve hose routing and avoid creating vacuum leaks. If hoses are connected correctly and clamps are secure, performance impact should be neutral or positive over time due to cleaner intake surfaces.
Can I install a catch can myself on a Scion xB?
Many owners can install a vehicle-specific catch can with basic tools and moderate mechanical familiarity. Choose a kit with clear instructions and vehicle-specific brackets to simplify the process. If you are unsure about hose routing or vacuum connections, seek help from a qualified technician to avoid leaks or misinstallation.
How do I choose between a baffled unit and a filter-type catch can?
Baffled designs use internal chambers to condense and trap oil, while filter-type units rely on a media element to capture droplets. Baffles often require less frequent media replacement but may be bulkier. Filter-type cans can offer fine separation but need periodic element changes. Consider maintenance access and separation efficiency when deciding.
Will a catch can help if my Scion xB is turbocharged?
If the vehicle is turbocharged, managing oil vapors becomes more important because trapped oil can affect the turbo intake and intercooler over time. A catch can designed for the vehicle and its specific turbo plumbing can reduce oil migration, but installation must be compatible with the forced-induction system to avoid pressure issues.
How We Chose the Best Scion xB Oil Catch Can
We focused exclusively on products designed to fit the Scion xB without modification and excluded universal or multi-vehicle kits that require custom plumbing or brackets. Selection prioritized airtight fitment, reliable baffle or filter designs suited to blow-by condensation, and materials that resist corrosion in under-hood environments. Key evaluation criteria included physical compatibility with Scion xB engine bay geometry, filtration method and particle separation efficiency, construction materials and corrosion resistance, mounting hardware and required installation steps, and ease of routine drain and inspection. We also considered oil retention capacity relative to typical service intervals and the clarity of installation instructions. Exclusions were products lacking clear vehicle-specific fitment, designs without a removable or serviceable reservoir, and kits that rely solely on non-sealed adapters. The result is a focused list of catch cans that meet practical installation and maintenance expectations for Scion xB owners.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a Scion xB oil catch can, prioritize a unit that fits the engine bay, offers effective separation, and is easy to service. Balance reservoir size with available space and pick a mounting solution that keeps the can away from heat and moving parts. Accept tradeoffs between compact units that are easier to tuck away and larger reservoirs that reduce service frequency. Regular inspection and timely draining are key to preserving intake cleanliness and maximizing the benefits of any catch can system.
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