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If you drive a Scion xD, fitting an oil catch can can reduce oil and residue entering the intake and intake tract over time. Picking the right catch can matters because fitment, filtration efficiency, and how the unit mounts will determine how well it prevents buildup and how easy it is to service. This guide covers our shortlist of the seven best oil catch cans chosen for fit and function on the Scion xD and explains the features we prioritized. Read on to learn which design and installation approach will suit your maintenance style and engine goals.
Looking for other parts? See all Scion xD parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | BOMLING 6.4L Billet Oil Catch Can Kit with Z‑Bracket for 5.7 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 | RALZAOTO Oil Catch Can (Anodized) |  |
| Best Value for Money The sweet spot between price and what you get | ESPEEDER Universal Aluminum Baffled Oil Catch Can with Breather Filter (300ml) |  |
| Best Overall The best all-around choice for most situations | EVIL ENERGY 300ml Baffled Oil Catch Can with 5ft NBR Hose Kit |  |
1. BOMLING 6.4L Billet Oil Catch Can Kit with Z‑Bracket for 5.7 HEMI
| Capacity | 0.12 Liters |
|---|---|
| Product Grade | Replacement Part |
| Fit Type | Vehicle Specific |
| Manufacturer | XUZHONG |
This billet oil catch can kit installs inline with the PCV/vent system to capture oil and blow‑by before it reaches the intake tract. It is supplied as a vehicle‑specific kit with a new Z‑bracket, billet hose ends, forged fittings and a diffuser to make routing and mounting straightforward on compatible HEMI engines. In everyday use it condenses oil vapor into the canister so you check and drain it during routine maintenance instead of letting oil and sludge coat intake components. The compact 4 oz reservoir means frequent checks on high‑blow‑by engines, but reviewers report noticeable sludge collection after a few thousand miles, which confirms it works. Installation can require removing engine covers and trimming supplied hoses to length, and the kit does not include detailed instructions so a basic mechanical aptitude or reference to an install video helps. The kit is a practical reliability upgrade for engines prone to PCV oil contamination but expect periodic draining and modest installation effort.
Best for: A reliability‑focused buyer who prioritizes protecting the intake and valve train from PCV oil contamination and is willing to perform basic DIY installation and routine maintenance.
Less Ideal for: Drivers who want a completely maintenance‑free solution or very large capacity systems for heavily modified or high‑boost engines should consider larger commercial units.
- Vehicle‑specific design with Z‑bracket that mounts to factory locations for a neat installation.
- Billet construction and forged fittings improve durability over basic plastic units.
- Includes hoses, hose ends and a diffuser so you get a complete kit for hookup.
- Effective at collecting oil vapor and sludge before it reaches the intake, reducing carbon and intake contamination.
- Small 4 oz reservoir requires more frequent inspection and draining on high‑mileage or high‑boost engines.
- No printed instructions included which can make the first install slower for less experienced users.
Verdict A compact, billet catch can kit that reliably reduces PCV oil contamination on compatible HEMI engines but needs periodic draining and some DIY installation work.
2. SPEEDWOW Universal Baffled Oil Catch Can Kit (300 ml)
| Fit Type | Universal Fit |
|---|---|
| Fuel Type | Gasoline |
| Item Weight | 2 pounds |
| Item model number | 1 |
This SPEEDWOW catch can is a small, user-serviceable unit designed to intercept oil and moisture from the PCV/CCV stream before it reaches the intake. It installs inline between the crankcase vent and intake on compatible engines and includes a removable baffle, a dipstick that doubles as a suction/drain port, and a removable bottom for easy draining. The kit ships with NBR 3/8" hose, hose clamps, an aluminum mount and Teflon tape so you can fit and secure it without sourcing parts. In practice the baffle and internal filter capture brown oily condensate and reduce carbon build up on intake components, which helps maintain combustion stability on older engines. Downsides to note for Scion xD owners: the supplied bracket and clamps are serviceable but some installers prefer stiffer or slotted brackets and stronger hose clamps for a tidier, more secure install, and condensation can collect in cold climates so frequent checks are needed in winter. The unit is otherwise straightforward to fit and easy to service for routine emptying and inspection.
Best for: Convenience-driven buyers who want a mostly complete kit that installs quickly and is easy to service to keep a Scion xD intake cleaner with minimal parts sourcing.
Less Ideal for: Drivers seeking a long-term, high-capacity or race-oriented solution should consider larger professional-grade catch cans and heavier-duty hardware instead.
- Complete kit includes hoses, clamps, mounting bracket and Teflon tape for a near-ready install.
- Removable baffle and bottom plus dipstick make inspection and draining simple without disassembly.
- NBR 3/8" hose provided is oil-resistant and rated for engine bay heat.
- Compact 300 ml can fits easily into tight engine bays like the Scion xD and still provides meaningful oil separation.
- Included hose clamps and aluminum bracket are functional but may require replacement or modification for a cleaner, more secure installation.
- Small 300 ml capacity means more frequent draining on engines with heavy blow-by or during cold, moist conditions.
Verdict A compact, user-friendly catch can kit that makes adding oil separation to a Scion xD quick and low-effort, though installers may want to upgrade clamps and the bracket for a neater fit.
3. EVIL ENERGY Air Oil Separator (Oil Catch Can)
| Fitment note | Installs on PCV side of engine |
|---|---|
| Recommended check interval | Inspect after 500–1000 miles |
| Vehicle coverage | Designed for compatible V8 GM engines listed in fitment |
This air oil separator installs inline with the PCV plumbing to trap fine oil vapor before it reaches the intake, helping keep the intake tract and valves cleaner. It uses a fine mesh aluminum filter and a small reservoir to separate and collect condensate, and comes with brackets, hoses, fittings, and installation instructions for a direct replacement-style fit. In use it reduces milky deposits and visible blow-by in the intake, and reviewers report easy installation and solid mounting on compatible engines. The unit’s compact reservoir means you will need to check and empty it regularly, and some buyers noted factory-sourced hoses can degrade under high under-hood heat so upgrading hose material improves long-term reliability. The package’s smaller fittings and plastic hose ends are convenient for plug-and-play installs but may be the first parts to replace on a performance vehicle subjected to high boost or heat. For a performance-oriented build this catch can offers effective vapor separation at a value compared with premium branded units, provided you plan routine maintenance and consider heavier-duty hoses for high-stress use.
Best for: Performance-focused DIYers who prioritize cleaner intake charge and reduced valve/combustion chamber deposits and are willing to perform regular maintenance and occasional minor upgrades.
Less Ideal for: Drivers seeking a maintenance-free, sealed long-interval solution or those unwilling to periodically inspect or replace supplied hoses should consider a larger or higher-end canister option instead.
- Fine mesh aluminum filter captures small oil vapor for cleaner intake and combustion.
- Includes custom brackets, hoses, and fittings for straightforward install without fabrication.
- Compact, milled housing with solid mount reduces risk of rattles or loss of fitment.
- Widely reported easy installation and direct-fit guidance for compatible engines.
- Reservoir is small so it requires frequent checking and draining during normal use.
- Some supplied hoses and plastic fittings have shown heat-related degradation on high-heat engines.
- Does not include a dipstick or larger capacity option for extended intervals.
Verdict A compact, performance-minded catch can that cleans intake vapors effectively for enthusiasts willing to maintain it and upgrade hoses for long-term heat resistance.
4. AOCISKA Aluminum Baffled Oil Catch Can Kit, 300ml
| Capacity | 300 Milliliters |
|---|---|
| Fit Type | Universal |
| Material | Aluminum |
| Product Grade | like new |
This aluminum baffled catch can collects oil and water from the crankcase ventilation system to reduce intake contamination and slow carbon buildup. It installs inline with PCV/CCV hoses and is typically mounted in the engine bay where hose routing and a small bracket or fabricated mount are required for a universal kit. Notable features include a removable bottom for easy draining, a built-in dipstick for level checks, and an internal baffle that can be rotated or augmented with a steel ball to improve condensing surface area. The aluminum body should offer decent durability and resistance to regular engine-bay conditions. As a budget option it gives practical protection for direct-injection engines like the Scion xD by catching oil before it reaches the intake, but being a universal kit you may need to fabricate or buy a mounting bracket and possibly extend hoses to fit specific Scion xD layouts. Assembly attention is important since incorrect baffle placement reduces effectiveness. Expect basic functionality at a low cost rather than a vehicle-specific plug-and-play solution.
Best for: Budget-conscious owners seeking an inexpensive way to reduce intake oil contamination on a Scion xD and willing to do minor fabrication or routing to fit a universal kit.
Less Ideal for: Buyers who want a guaranteed, bolt-on catch can with vehicle-specific brackets and fittings or those who prefer professional installation without any modification.
- Baffled internal design improves oil/steam separation compared with a plain can.
- Removable bottom and dipstick make draining and monitoring straightforward.
- Aluminum construction offers good strength and heat resistance for engine-bay fitment.
- Comes as a kit with hoses and fittings for a complete installation starting point.
- Universal fit requires custom mounting or additional hose for a clean install on some vehicles.
- Not a vehicle-specific kit so instructions and bracketry are minimal or absent.
Verdict A low-cost, aluminum baffled catch can that protects the Scion xD’s intake on a budget but requires some DIY mounting and hose work.
5. RALZAOTO Oil Catch Can (Anodized)
| Compatible models listed | Various GM 5.3L and 6.2L trucks and SUVs (see fitment guidance) |
|---|---|
| Material | Anodized aluminum |
| Installation time | About 30 minutes |
| Filter type | Fine mesh aluminum |
This oil catch can captures oil and blow-by vapor from the PCV system before it reaches the intake, using a fine mesh aluminum filter to condense and trap oil. It is supplied with hoses, custom brackets and fittings for direct replacement and claims a roughly 30-minute install when access and hoses match. For day-to-day use the catch can sits inline on the PCV plumbing and collects condensate that you check and drain every 500 to 1,000 miles. The anodized aluminum body resists heat and pressure and should tolerate under-hood conditions on gasoline engines. Reported benefits include noticeably less oil in the intake and simple, straightforward plumbing that fits without major modification. Limitations are its relatively small reservoir capacity which some owners report requires frequent checks on high-mileage driving, and the need to confirm hose routing because a few users found instructions sparse. This is a practical, low-cost separator for owners who want to reduce intake carbon and oil deposits, but plan periodic emptying and careful installation.
Best for: Risk-averse mainstream buyers who prioritize reducing intake oil buildup with a straightforward, factory-replacement style add-on and prefer a low-cost, proven solution they can install or have installed quickly.
Less Ideal for: Users seeking a large-capacity or maintenance-free system, or those unwilling to perform periodic inspections and draining should consider higher-capacity or serviced options instead.
- Anodized aluminum construction resists heat and under-hood conditions.
- Includes hoses, brackets and fittings for a direct replacement-style installation.
- Fine mesh aluminum filter captures fine oil vapor to reduce intake contamination.
- Simple bolt-on installation typically completed in about 30 minutes.
- Relatively small reservoir means more frequent checks and emptying on daily-driven vehicles.
- Instructions and labeling can be minimal, requiring some mechanical familiarity for correct hose routing.
Verdict A budget-friendly, heat-resistant catch can that reduces intake oil contamination but requires regular draining due to its small reservoir.
6. ESPEEDER Universal Aluminum Baffled Oil Catch Can with Breather Filter (300ml)
| Capacity | 300 Milliliters |
|---|---|
| Material Type | Aluminum |
| Fit Type | Universal Fit |
| Fuel Type | Gasoline |
| Product Grade | Performance Parts |
This ESPEEDER catch can is a simple, budget-oriented solution for reducing oil vapor and moisture in the PCV/boost plumbing. It installs inline between the valve cover and intake or on a breather port on naturally aspirated engines and uses an internal dual-chamber baffle plus a breather filter to condense and collect oil in a 300ml reservoir. The anodized T-6061 aluminum body and TIG welded seams give it a factory-quality feel, and a built-in dipstick plus removable bottom make level checks and draining straightforward. The kit includes multiple fittings, a vented breather option, and basic mounting hardware, but the supplied rubber hose and some fittings are lightweight so you may want to fit high-temp vacuum hose and sturdier clamps for a Scion xD application. For a practical optimizer seeking improved intake cleanliness without a large expense, this catches moderate amounts of oil and is easy to service; it is not a precision, vehicle-specific engineered unit and will need careful hose routing and mounting on the xD to avoid heat exposure.
Best for: A practical optimizer who wants an affordable, do-it-yourself way to reduce intake oil contamination on a Scion xD and prefers parts that are easy to install and service.
Less Ideal for: Drivers seeking a vehicle-specific, performance-tuned catch can with precision fittings and guaranteed fitment or those unwilling to fabricate a secure mount on the xD should consider other options.
- Anodized T-6061 aluminum body and TIG welds provide durability and a polished look
- Internal dual-chamber baffle and breather filter improve oil and moisture separation
- Built-in dipstick and removable drain make inspection and servicing easy
- Includes multiple fittings, mounting bracket, O-rings, and hose clamps for installation
- Supplied rubber hose and some fittings are lower quality and may require replacement for high-temperature or long-term use
- Universal design means no vehicle-specific mounting hardware or guaranteed fitment details for the Scion xD
Verdict A cost-effective, serviceable catch can that cleans intake vapors for a Scion xD but requires some upgraded hose and careful mounting for long-term reliability.
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 | M16 x 1.5 |
This EVIL ENERGY catch can is a compact, universal 300ml baffled separator designed to trap oil and moisture before crankcase vapors re-enter the intake. It is typically mounted inline with PCV/CCV hoses or used as a breather on pre-PCV systems. The kit includes a removable baffle, stainless steel wool for coalescing, an aluminum canister with threaded ports, and a 5 ft NBR hose rated for heat and wear. In practice the baffled core and wool do a good job collecting oily residue, reducing valve and intake deposits on everyday driven engines. Installation is straightforward for a Scion xD with some planning for hose routing and mounting clearance; users report the included fittings seal tightly and the can’s compact profile fits under the hood without blocking access to routine service points. Limitations: the kit is universal so some vehicles need extra hose or different fittings for a clean install, and in very cold climates moisture can freeze without regular maintenance. Expect occasional draining and periodic cleaning of the wool for best performance.
Best for: Balanced all-round buyers who want a practical engine protection upgrade for a Scion xD and value a durable, easy-to-fit aftermarket solution to reduce intake contamination.
Less Ideal for: Owners seeking a vehicle-specific plug-and-play kit with exact factory-style fittings or those unwilling to perform occasional maintenance in cold climates should consider other options.
- Effective baffled design with removable baffle and steel wool to capture oil and moisture
- Solid billet-style aluminum construction that seals tightly and resists corrosion
- Includes 5 ft NBR hose with good heat and wear resistance for routing in the engine bay
- Compact 300ml capacity fits neat locations and reduces how often you need to empty it
- Can be installed as a breather or inline with PCV hoses for flexible use on different setups
- Universal fittings may require buying extra hose or adapters for an exact fit on some vehicles
- Small O-rings on supplied fittings can be awkward to install and require careful tightening
Verdict A compact, well-built universal 300ml baffled catch can that offers strong protection for a Scion xD but may need minor hoses or fittings adjustments for a perfect fit.
Choosing the Right Scion xD Oil Catch Can: Key Factors to Consider
Fitment And Mounting
Correct fitment ensures the catch can can be securely mounted in the limited space of the Scion xD engine bay. Look for mounting brackets or universal options that allow placement away from hot components and moving parts.
Mount points and hose routing affect ease of installation and long-term reliability. A poorly fitted unit can lead to kinks, strain on hose ends, or interference with other systems, so verify available clearance and bracket adjustability before committing.
Filtration And Separation Design
The internal design determines how effectively the unit removes oil vapor and droplets from crankcase gases. Baffles, mesh, and coalescing elements all influence separation efficiency and how quickly the can fills.
Better separation reduces oil deposits in the intake tract and helps maintain consistent engine performance. Consider whether the design targets fine aerosol removal or primarily larger droplets based on your driving and maintenance habits.
Materials And Build Quality
Durable materials resist corrosion, leaks, and wear from repeated servicing. Look for anodized aluminum, stainless steel fittings, and quality seals to ensure long-term reliability in an under-hood environment.
Solid machining and thread quality reduce the risk of stripped fasteners or leaking drain plugs. Higher build quality also often translates to tighter tolerances and more consistent separation performance over time.
Hose Compatibility And Connections
Proper hose size and secure fittings are essential for leak-free operation. Confirm the recommended hose diameter matches the Scion xD PCV and intake ports and that barbed or push-fit connections are robust.
Secure clamps and quality hose materials reduce the chance of vacuum leaks or disconnections during spirited driving. Also consider whether adapters or hose kits are needed for a clean, reliable connection.
Serviceability And Drain Options
How easy it is to drain and inspect the catch can will govern maintenance frequency and user compliance. Drain valves, threaded plugs, and removable internals make routine service quicker and cleaner.
Units that require disassembly for every service can discourage regular maintenance, so factor in access, drain orientation, and whether you can empty the can without removing it from its mount.
Impact On Engine Vacuum And PCV Operation
A catch can interacts with the PCV and vacuum system, so it should not introduce excessive restriction or disrupt crankcase ventilation. Designs with minimal flow resistance help preserve normal engine breathing and idle stability.
Consider whether the catch can requires additional fittings or check valves to maintain proper PCV operation, especially if the vehicle is modified or used under varying loads.
FAQ
Do I need an oil catch can for my Scion xD?
An oil catch can can reduce the amount of oil and sludge that enters the intake over time, which may help keep intake valves and throttle bodies cleaner. Whether it is necessary depends on your driving habits, engine condition, and maintenance goals, as benefits accumulate gradually rather than immediately.
How often should I empty a catch can on a Scion xD?
Drain frequency depends on driving conditions and the catch can design. Many owners check monthly at first to establish a pattern, then adjust to longer intervals if fill rates are low. Regular checks prevent overflow and ensure the unit continues to separate effectively.
Will adding a catch can affect my Scion xD engine performance?
A properly sized and installed catch can should not harm engine performance and may help keep intake components cleaner over time. It is important to maintain correct hose routing and secure fittings to avoid vacuum leaks that could impact idle or drivability.
Can I install a catch can myself on a Scion xD?
Many installations are straightforward and possible with basic tools, clear instructions, and attention to hose routing and secure mounting. Complexity varies by kit and your experience level, so plan time for careful routing and testing for leaks after installation.
What maintenance steps keep a catch can working well?
Regular draining, inspecting seals and hoses, and checking fittings for tightness are key tasks. Also inspect internal baffles or filters if the design allows, and replace any hoses or clamps that show wear to maintain separation efficiency.
How We Chose the Best Scion xD Oil Catch Can
We focused on components and attributes that directly affect performance and longevity on the Scion xD. Primary evaluation criteria included build quality and materials, such as corrosion-resistant housings and robust fittings; filtration and separation efficiency to limit oil vapor and sludge from reaching the intake; mounting and fitment options that accommodate the Scion xD engine bay and maintain secure routing; ease of installation, including clear hose runs and necessary hardware; serviceability, meaning drainability and accessible filters or baffles; and compatibility with the vehicle's PCV and vacuum systems. We excluded products that lacked clear hardware or mounting guidance for the Scion xD or that used unclear materials and construction methods. The resulting selections prioritize effective oil separation, durable construction, straightforward install processes, and practical maintenance access specific to this vehicle.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing an oil catch can for a Scion xD, prioritize fitment and secure mounting, effective separation design, and materials that will withstand under-hood conditions. Ease of installation and serviceability are important because they determine whether you will maintain the unit consistently. Balance the tradeoffs between compact mounting and separation efficiency, and verify hose compatibility with the vehicle’s PCV system. A well-chosen catch can can reduce intake deposits over time while requiring only routine checks and drains to keep it functioning.
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