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If you own a Ford Focus and want to protect the engine from oil-laden blow-by, choosing the right oil catch can can make a practical difference. The correct unit helps reduce oily residues in the intake and on intake valves, which can help maintain performance and lower the risk of long-term buildup.This guide covers seven shortlisted oil catch cans for the Ford Focus. We evaluated each option for vehicle-specific fitment, filter media and separation efficiency, ease of installation, and maintenance needs. Read on to find models that match your priorities and intended use.
Looking for other parts? See all Ford Focus parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | J&L Oil Separator Co. 3.0 Oil Separator (Front PCV Side) |  |
| Best quality Built to a higher standard if you want something more solid | EVIL ENERGY 300ml Baffled Oil Catch Can with 5ft NBR Hose Kit |  |
| Best Value The sweet spot between price and what you get | WENJTP 150ml Universal Baffled 3-Port Oil Catch Can with Breather Filter |  |
| Best budget The cheapest option that still gets the job done reliably | YESHMA 750ml Billet Aluminum Baffled 2-Port Oil Catch Can with Breather Filter and Drain Valve |  |
| Highest Rated A top-rated pick with lots of positive feedback | EVIL ENERGY 300ml Baffled Oil Catch Can Kit with NBR Hose |  |
| Most popular A crowd favorite that many people choose with confidence | RULLINE 350ml Baffled Aluminum Oil Catch Can |  |
| Best Seller A high-volume bestseller chosen again and again | EVIL ENERGY 300ml Baffled Oil Catch Can Kit with Breather Filter |  |
1. J&L Oil Separator Co. 3.0 Oil Separator (Front PCV Side)
| Model | 3021F-B |
|---|---|
| Exterior | Machined |
| Tank capacity | 3 oz |
| Manufacturer | J&L |
This J&L 3.0 oil separator installs in the front PCV line to capture oil mist before it reaches the intake on 2013–2018 Focus STs. The machined tank uses a fine mesh stainless filter that lets vapor condense and collect as droplets in the 3 oz reservoir, while a knurled base and O-ring make draining straightforward and leak resistant. Most owners report a straightforward installation using stock hoses and included hardware or brackets for a factory-fit appearance, and periodic checks after the first 1,000 miles help dial in service intervals. Practical benefits include cleaner intake tract, reduced valve and carbon buildup on a GDI engine, and visible proof of oil being caught during regular inspections. The unit is relatively small so it fills between 2,500 and 3,500 miles in many cars, which means it requires periodic draining. Instructions and hose routing can be clearer for some engines, and removing or working around the intake manifold may be needed on tighter installations, which adds install time for less experienced DIYers.
Best for: Balanced, all-round Focus ST owners who want a reliable, well-made catch can to reduce intake oil contamination while retaining a factory-style appearance and straightforward maintenance.
Less Ideal for: Buyers seeking a completely maintenance-free solution or those unwilling to perform periodic draining and occasional re-routing during install should consider other options.
- Machined aluminum body with O-ring seal for a leak-resistant, durable assembly
- Fine mesh stainless filter to condense and trap oil vapors before they reach the intake
- Knurled removable base simplifies draining collected oil
- Includes hoses, brackets and hardware for a near-factory installation in many cases
- Small 3 oz reservoir requires regular draining under spirited or high-mileage driving
- Installation may require extra time or partial intake removal on some cars due to hose routing
Verdict: A durable, factory-style oil separator that effectively removes oil vapors from the PCV line for cleaner intake performance on 2013–2018 Focus STs.
2. 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" |
| Port thread | M16×1.5 |
This EVIL ENERGY catch can is a compact, performance-focused unit designed to intercept oil and moisture before they re-enter the intake. Install it in-line with the PCV/CCV plumbing or use the breather filter option for pre-PCV setups; the removable baffle and included steel wool increase coalescing surface area so condensate and oil droplets collect inside instead of traveling into the throttle body and intake tract. The kit includes a 5ft NBR hose with 3/8" ID and M16*1.5 threaded ports for a secure connection and comes with basic mounting hardware and clamps. In practice the 300ml capacity is large enough to avoid frequent emptying while staying small for tight engine bays, and users report solid fit, durable aluminum construction, and straightforward installation. Important limitations are its universal-fit nature: depending on your Focus model you may need additional hose, different fittings, or extra clamps to route and secure it cleanly, and in very cold climates moisture can freeze so more frequent cleaning or reverting to OEM routing in winter may be necessary.
Best for: Performance-oriented owners who prioritize protecting the intake and valves from blow-by contamination and who are comfortable adapting a universal kit to their Focus for cleaner combustion and longer engine life.
Less Ideal for: Drivers seeking a direct factory-style replacement or a model-specific plug-and-play kit should consider purpose-made catch cans for their exact Focus year and engine to avoid extra fitting work.
- Baffled design plus steel wool for improved oil and moisture separation
- Compact 300ml capacity balances space and collection volume
- Sturdy CNC-machined aluminum body and tight threaded fittings
- Includes 5ft NBR hose with good heat and wear resistance
- Simple universal kit that installs in-line with PCV or as a breather system
- Universal fittings may require additional hoses or adapters for a clean install on some vehicles
- O rings supplied can be tight to install and are at risk if overtightened
- Requires more frequent cleaning in freezing conditions to avoid moisture-related freezing
Verdict: A well-built, performance-minded 300ml baffled catch can that delivers effective oil separation but may need extra hoses or fittings to fit a Ford Focus neatly.
3. WENJTP 150ml Universal Baffled 3-Port Oil Catch Can with Breather Filter
| Capacity | 150 Milliliters |
|---|---|
| Ports | 2 inlets, 1 outlet (3/8-18 NPT) |
| Material | 6061 Aluminum, anodized |
| Fit Type | Universal |
This 150 ml baffled catch can is a compact, budget-focused solution that traps oil and moisture from crankcase ventilation before they reach the intake. It installs in-line between the PCV and intake using the included adapters and offers two inlet ports and one outlet so you can route multiple hoses or consolidate lines. The internal baffle and bronze micron filter improve separation compared with an open-can design, and a drain valve makes periodic service straightforward. The kit also includes a 360 degree adjustable bracket for flexible mounting in tight engine bays like the Ford Focus. Downsides are the small 150 ml capacity, which means more frequent draining compared with larger cans, and reports that some fittings and mounting hardware are basic and may need upgrading for long-term durability. Also the tapered thread and added thread tape can prevent adapters from threading fully, which could complicate a neat installation. For a practical optimizer on a Focus, it provides solid filtration at a low cost if you accept smaller capacity and occasional hardware swaps.
Best for: A practical optimizer looking for an inexpensive, effective way to reduce intake oil contamination on a Ford Focus without investing in a high-end unit; ideal for DIYers who will maintain the can regularly and adapt fittings as needed.
Less Ideal for: Not recommended for owners who want a maintenance-free, high-capacity solution or for those unwilling to replace supplied hardware for a cleaner long-term installation.
- Baffled design with low-micron bronze filter to improve oil/mist separation
- Three-port layout lets you route multiple PCV lines or use consolidated plumbing
- 360 degree adjustable mounting bracket for flexible placement in tight bays
- Drain valve and removable internals make cleaning and reuse straightforward
- Small 150 ml capacity requires more frequent draining on engines with high crankcase blow-by
- Some supplied fittings and mounting hardware are low quality and may need replacement
- Tapered thread and added thread seal tape can prevent adapters from seating fully, complicating assembly
Verdict: A compact, low-cost baffled catch can that delivers solid oil separation for a Ford Focus if you accept small capacity and occasional hardware upgrades.
4. YESHMA 750ml Billet Aluminum Baffled 2-Port Oil Catch Can with Breather Filter and Drain Valve
| Fuel Type | Diesel, Gasoline |
|---|---|
| Fit Type | Universal |
| Manufacturer | YESHMA |
This YESHMA catch can is a budget-friendly way to reduce oil and crankcase vapors entering a Ford Focus intake. It mounts in-line with the PCV or crankcase ventilation and collects oil mist in a baffled 750ml reservoir while letting vapors pass through the breather filter. The billet aluminum body is anodized for durability and the kit includes fittings, a hose clamp, and a quick-drain valve for routine maintenance. Real-world benefits are cleaner intake valves and reduced deposit buildup under spirited driving or turbocharged operation, which can help maintain power and throttle response over time. Downsides to expect at this price are variable machining quality and occasional fit issues that may require minor cleaning or trimming before installation, plus the unit’s physical length can interfere with tight engine bays. This catch can is practical for owners who will inspect and service it regularly but may need some adaptation to fit without modification on certain Focus model years.
Best for: Budget-conscious Ford Focus owners who want a low-cost preventative upgrade to reduce intake valve and intake tract deposits while accepting minor fitment work and hands-on installation.
Less Ideal for: Owners looking for a direct-fit, vehicle-specific bolt-on solution or those who prefer a plug-and-play product without any trimming or prep work.
- Solid billet aluminum construction with anodized finish for corrosion resistance and durability
- Baffled 2-port design that separates oil and lets vapors breathe to reduce intake contamination
- Includes breather filter, hose connectors, clamp, and a drain valve for easier servicing
- 750ml reservoir capacity reduces how often you need to empty it compared with very small cans
- Universal fitment means it may require trimming, different hose lengths, or bracket work to fit some engine bays
- Some units show inconsistent machining or debris in ports that need cleaning before installation
Verdict: A cost-effective, serviceable catch can that cleans intake vapors for Ford Focus cars but may need preparatory cleaning and minor fitment work to install.
5. EVIL ENERGY 300ml Baffled Oil Catch Can Kit with NBR Hose
| Capacity | 300 Milliliters |
|---|---|
| Fit Type | Universal |
| Hose length | 2.6ft (0.8m) |
| Hose ID/OD | 3/8" ID, 2/3" OD |
| Inlet/Outlet thread | M16×1.5 |
This EVIL ENERGY catch can is a compact, baffled aluminum separator intended to trap oil and moisture from crankcase ventilation before vapors reach the intake. It installs inline with PCV/CCV hoses or as a vented breather on pre-PCV systems and includes a removable baffle and steel wool to improve coalescing. The kit ships with an NBR fuel hose, clamps, fittings with M16x1.5 threads, O-rings, a mounting bracket, and a 300ml reservoir that is easy to check with the supplied dipstick. In practice the can reduces oiling of the intake and helps limit carbon buildup on throttle bodies and intake valves, which supports longer-term reliability for the engine. Installation is generally straightforward for a universal kit but routing may require extra hose length or slight bracket modification on some cars. In cold climates the manufacturer warns moisture can freeze, so more frequent drains or temporary removal of the catch can is advised. Overall it offers solid build quality and functionality at a value price, with a few minor fitment and accessory trade-offs to plan for before install.
Best for: Reliability-focused buyers who prioritize protecting the engine from intake contamination and want a cost-effective preventive upgrade to reduce long-term valve and intake deposits on a Ford Focus.
Less Ideal for: Drivers seeking a vehicle-specific, plug-and-play factory-style kit or those unwilling to do minor routing or bracket adjustments should consider a model made specifically for their Focus variant.
- Baffled internal design with removable baffle and steel wool improves oil/moisture separation.
- Compact 300ml aluminum can is sturdy and easy to mount in tight engine bays.
- Includes NBR hose and fittings with secure M16x1.5 threaded ports for a sealed connection.
- Supplied dipstick and O-ring sealed cap make inspection and draining straightforward.
- Universal kit components work for a wide range of engine layouts with basic modification.
- Bracket and provided hose length may not fit cleanly without additional hose or minor fabrication.
- O-rings and some small fittings can be fiddly to fit and may require care to avoid damage.
- Potential for moisture to freeze in very cold climates requiring more frequent maintenance.
Verdict: A well-built, budget-friendly baffled catch can that reduces oil backflow into the intake to help preserve engine cleanliness and reliability.
6. RULLINE 350ml Baffled Aluminum Oil Catch Can
| Capacity | 350 Milliliters |
|---|---|
| Material | Aluminum |
| Fit Type | Universal |
| Product Grade | Performance Part |
| Fuel Type | Gasoline |
This RULLINE catch can is a compact, baffled oil separator intended to intercept oil and moisture from PCV/CCV lines before they reach the intake. It mounts in the engine bay and connects inline between the crankcase ventilation and intake plumbing to collect emulsified oil and fuel vapors in its 350ml reservoir. The can is TIG-welded aluminum with an anodized finish, a removable bottom and an included dipstick for quick fluid checks without disassembly. It ships with three adapter fittings and a braided hose to fit several hose diameters and a simple bracket for mounting. Practical benefits for a Ford Focus include reduced carbon build-up on the intake and throttle body and easier visual checks of collected contamination. Limitations are that the universal fittings and hose may require additional hose or clamps to match Focus PCV and intake fittings, and the small 350ml capacity needs more frequent emptying on cars with heavy blow-by. Installation also usually requires creating or modifying a mount point in the Focus engine bay.
Best for: A convenience-driven buyer who wants a simple, compact solution to reduce intake contamination on a Ford Focus and prefers an easy-to-check, bolt-on part over more involved engine work.
Less Ideal for: Drivers seeking a maintenance-free long-capacity solution or plug-and-play fitment without any hose or bracket modification should consider model-specific kits instead.
- TIG-welded aluminum body and anodized finish for corrosion resistance and durability.
- Baffled reservoir design helps separate oil and moisture from intake vapors.
- Includes dipstick for quick level checks without disassembly.
- Comes with three adapter fittings and a braided hose to handle multiple hose sizes.
- Universal fittings and supplied hose may not match Ford Focus PCV/intake diameters without additional hoses or clamps.
- 350ml capacity is relatively small and will require regular draining on engines with higher blow-by.
Verdict: A compact, affordable baffled catch can that helps keep a Ford Focus intake cleaner but may need minor hose and mounting tweaks and frequent emptying due to its 350ml size.
7. EVIL ENERGY 300ml Baffled Oil Catch Can Kit with Breather Filter
| Capacity | 300 Milliliters |
|---|---|
| Fuel Type | Gasoline |
| Fit Type | Universal |
| Manufacturer | Speedwow Tuning |
This EVIL ENERGY catch can is a compact, universal baffled separator meant to intercept oil and blow-by from the crankcase before it reaches the intake tract. It is typically installed in-line with PCV hoses or used as a vent on pre-PCV systems using the included hose and optional breather filter. The 300ml aluminum tank, internal baffle and stainless wool element help trap oil droplets while the dipstick makes level checks straightforward. For a Saturn Vue, the kit is suited to owners who want a simple add-on to help limit intake valve deposits and keep the intake cleaner between services. Installation requires routing the provided hose and securing the can in the engine bay where there is room, and the universal fittings mean shop adjustment or small adapters may be needed for some hose sizes on specific Vue model years. The kit is practical and affordable but small capacity means more frequent inspection and draining than larger catch cans, and universal fitment lacks vehicle-specific brackets or fittings.
Best for: Risk-averse mainstream Saturn Vue owners who prioritize protecting the intake from oil contamination with a straightforward, low-cost add-on and prefer something simple to install and inspect.
Less Ideal for: Owners seeking a vehicle-specific kit with dedicated brackets, larger capacity, or a plug-and-play harness should look for purpose-built options designed specifically for the Saturn Vue.
- Baffled internal design and stainless wool help separate oil from PCV air
- Includes breather filter option for venting on pre-PCV setups
- Compact 300ml aluminum tank is lightweight and corrosion resistant
- Dipstick provided for easy fluid level checks
- 300ml capacity requires more frequent draining compared with larger cans
- Universal mounting and hose sizes may need adapters or custom brackets for clean installation on a Saturn Vue
Verdict: A compact, affordable baffled catch can kit that gives Saturn Vue owners a simple way to reduce oil vapor entering the intake and help keep the engine cleaner between services.
Choosing the Right Ford Focus Oil Catch Can: Key Factors to Consider
Fitment and Compatibility
Correct fitment matters because space in the engine bay and existing PCV routing differ by model year and engine variant. A direct-fit or vehicle-specific bracket reduces installation time and the risk of improper hose routing.
If the can is too large or the bracket poorly placed, you may need extra modifications or extended hoses that can compromise reliability. Verify mounting points, hose lengths, and clearances to ensure the catch can integrates without interfering with other components.
Separation Efficiency and Filtration Media
The core purpose of a catch can is to separate oil vapor from crankcase gases before they reach the intake. Different internal baffles, mesh packs, or filter media capture oil droplets at varying efficiencies, which affects how much residue reaches the intake over time.
Higher separation efficiency lowers the frequency of intake cleaning and can reduce valve and throttle body deposits. Ask how the unit achieves separation and whether the manufacturer provides any performance data or explanations of the internal design.
Capacity and Drain Design
Canister capacity determines how often you must service the unit. Larger capacity means longer intervals between drains but can add bulk. Drain design is equally important; a quick-drain petcock or threaded drain makes servicing faster and less messy.
Consider your driving habits and maintenance schedule when choosing capacity. Regular inspection intervals and a user-friendly drain reduce the likelihood of overflow and make upkeep straightforward.
Materials and Corrosion Resistance
Materials affect durability and long-term appearance. Aluminum, stainless steel, and high-quality polymers each have trade-offs in weight, corrosion resistance, and heat tolerance. Protective finishes and anodizing can help resist corrosion from oil and moisture.
Choosing a robust material and finish reduces the chance of leaks or degraded fittings. Also check hose material compatibility with oil and heat exposure to avoid premature failure.
Installation Complexity and Kit Completeness
Some catch can kits include vehicle-specific brackets, hoses, clamps, and fittings that simplify installation. Others require additional adapters or fabrication. If you plan a DIY install, look for clear instructions and all necessary hardware.
Complex installs may demand removal of components or routing that complicates future maintenance. A complete kit with labeled hoses and robust clamps reduces errors and supports a clean installation.
Maintenance Accessibility and Serviceability
Regular servicing is necessary for reliable performance. Consider how easy it is to remove the can or drain it in place, and whether the internal media is replaceable or cleanable. Accessibility in the engine bay affects how often you will actually perform maintenance.
Units that allow quick inspection and cleaning encourage consistent upkeep and help maintain separation performance. Poor access can lead to neglected maintenance and reduced effectiveness over time.
How We Chose the Best Ford Focus Oil Catch Can
We started by focusing on units designed or easily adaptable for the Ford Focus platform, prioritizing direct-fit options and kits that include the necessary hoses and mounting hardware. Key evaluation criteria included separation efficiency of the filter media, the canister capacity and drain options, mounting points and bracket quality for secure installation, and clarity of installation instructions and kit completeness. We also considered build materials and corrosion resistance because long-term exposure to oil and moisture affects durability. Maintenance accessibility and ease of draining without removing the entire unit were factored in to assess real-world ownership convenience.We excluded universal or highly generic units with unclear fitment that would likely require extensive modification. We also excluded products lacking basic filtration details or those without clear hose routing guidance. The final list balances fitment, performance of oil separation, and long-term serviceability for Ford Focus owners.
Our full evaluation process is outlined in our review methodology.
FAQ
How often should I empty a Ford Focus oil catch can?
Frequency depends on driving style and engine condition but often ranges from every few thousand miles to at least every oil change. Inspect the can periodically and drain when the level approaches the maximum mark to prevent overflow and preserve separation efficiency.
Will installing a catch can affect engine performance?
A properly installed catch can should not harm performance. It redirects crankcase vapors through filtration rather than allowing oily vapors to coat the intake. Ensure hose routing and connections maintain proper crankcase ventilation to avoid introducing vacuum or pressure problems.
Can I install a catch can myself on a Ford Focus?
Many owners can install a vehicle-specific catch can with basic tools if the kit includes brackets and fittings. Plan time for careful routing and tightening of clamps, and follow instructions closely. If routing is unclear or access is tight, a professional installation can ensure correct fitment.
Does a catch can help with turbocharged engines in the Ford Focus?
For turbocharged variants, a catch can can reduce the amount of oil vapor entering the intake and turbo inlet, which may help keep compressor and intake surfaces cleaner. Effectiveness depends on the can's separation efficiency and proper installation into the PCV and intake plumbing.
What maintenance should I perform on a catch can?
Regularly check fluid level, drain the collected oil, and inspect hoses and clamps for leaks or degradation. Clean or replace internal filter media if the design allows. Keeping service intervals consistent preserves separation performance and avoids buildup.
Conclusion
Choosing the right oil catch can for a Ford Focus comes down to fitment, separation performance, and ease of maintenance. Prioritize units that offer clear vehicle-specific fitment, effective internal filtration, and a convenient drain system so you will maintain them regularly.Expect tradeoffs between capacity and packaging space, and balance material durability with installation complexity. Focus on long-term serviceability and proper hose routing to preserve intake cleanliness and engine reliability.
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