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If you drive a Mercedes-Benz GLA and want to reduce oil contamination in the intake tract, choosing the right oil catch can matters. A properly selected catch can helps limit oil and sludge buildup that can foul intake valves, reduce turbo efficiency, and increase maintenance needs. This guide presents seven shortlisted options that fit the Mercedes-Benz GLA and explains the key criteria we used to evaluate them. Read on to understand the practical benefits and the factors to consider before you install a unit on your vehicle.
Looking for other parts? See all Mercedes-Benz GLA 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 (4 oz) |  |
| Most Popular A crowd favorite that many people choose with confidence | RULLINE 350ml Universal Baffled Oil Catch Can |  |
| Best Quality Built to a higher standard if you want something more solid | EVIL ENERGY Air Oil Separator (3 oz) for 5.3L/6.2L GM V8 Applications |  |
| Best Budget The cheapest option that still gets the job done reliably | ZNDAW 2-Port Aluminum Oil Catch Can Kit with Breather Filter and Drain Valve |  |
| Most Sold A high-volume bestseller chosen again and again | RALZAOTO Oil Catch Can Separator (anodized aluminum) |  |
| Best Value for Money The sweet spot between price and what you get | TEMSONE Universal 2-Port 750ml Aluminum Baffled Oil Catch Can with Breather Filter |  |
| Best Overall The best all-around choice for most situations | EVIL ENERGY 300ml Baffled Oil Catch Can with 5ft NBR Hose Kit |  |
1. BOMLING Billet Oil Catch Can Kit with Z-Bracket (4 oz)
| Capacity | 4 ounces |
|---|---|
| Fit Type | Vehicle Specific |
| Product Grade | Replacement Part |
| Manufacturer | XUZHONG |
This billet oil catch can kit is built to intercept oil and blow-by vapors before they reach the intake, condensing them into a 4-ounce reservoir that you can drain during maintenance. It installs inline with the PCV/UPR plumbing using the included billet hose ends, forged fittings, and a new Z-bracket for a compact, secure mount. In use the internal baffling and diffuser encourage vapor to cool and condense so mostly clean air returns to the intake system while oil collects in the can. The kit is vehicle-specific and comes with hoses and mounting hardware that simplify installation, though hoses must be trimmed to length and some trimming or cover removal may be needed for tight engine bays. The small 4 oz capacity means more frequent checks on high-mileage or boosted engines, but the lightweight billet construction and straightforward drain make it an effective reliability upgrade for preventing oil deposits in the intake tract.
Best for: Reliability-focused drivers who prioritize preventing intake contamination and extending engine life by adding a direct, mechanical solution to manage crankcase vapors.
Less Ideal for: Drivers seeking a zero-maintenance solution or larger capacity for high-boost or heavily modified engines should consider larger catch cans or purpose-built systems instead.
- Vehicle-specific kit with dedicated bracket and fittings for a tidy installed fit
- Billet construction and forged fittings provide a durable, OEM-style feel
- Internal baffling and diffuser help condense vapors and retain oil instead of sending it to the intake
- Includes hoses and hardware for a mostly complete install
- Compact footprint makes it easy to access for periodic draining
- 4-ounce reservoir is small and requires frequent emptying on engines that produce more blow-by
- May require removing or modifying engine covers or trimming hoses for fitment in tight engine bays
Verdict A durable, vehicle-specific catch can that improves long-term engine cleanliness but needs regular draining because of its small 4 oz reservoir.
2. RULLINE 350ml Universal Baffled Oil Catch Can
| Capacity | 350 Milliliters |
|---|---|
| Fuel Type | Gasoline |
| Product Grade | Performance Part |
| Fit Type | Universal |
This RULLINE 350ml oil catch can captures oil and moisture from the PCV/CCV stream before they reach the intake, helping reduce carbon and sludge buildup in the intake tract of a Mercedes-Benz GLA. It installs inline between the PCV outlet and intake and includes three adapter fittings, a braided hose, a dipstick for quick fluid checks, and a threaded bottom for service. The can is fully TIG welded from aluminum with internal baffling and an O-ring sealed drain cup to limit leaks. Practical benefits for GLA owners include easier maintenance of intake cleanliness, a small service interval visibility via the dipstick, and a durable braided hose that is less likely to perish than cheap rubber. Be prepared to plan a custom mounting solution and verify hose diameters on your GLA, since the universal fittings and included bracket may not match factory locations or hose sizes exactly. The 350ml capacity is useful for periodic catch but will require occasional emptying on higher-mileage or turbocharged applications.
Best for: A convenience-driven buyer who wants a simple retrofit to reduce intake contamination on a Mercedes‑Benz GLA without complex fabrication and prefers visible, easy-to-check maintenance items.
Less Ideal for: If you want a plug-and-play system with vehicle-specific brackets and pre-sized hoses, choose a catch can kit engineered specifically for the GLA instead.
- Baffled, TIG-welded aluminum body resists corrosion and provides a sealed reservoir.
- Includes braided hose and three adapter fittings for common installations.
- Dipstick and threaded drain make monitoring and servicing the can straightforward.
- Universal fittings and small mounting bracket may require custom hoses or a bespoke mount for proper fitment.
- 350ml capacity will need regular emptying on heavily-used or turbocharged engines.
Verdict A compact, well-made universal catch can that simplifies oil separation for GLA owners but may need custom mounting and hose matching for a neat factory-style installation.
3. EVIL ENERGY Air Oil Separator (3 oz) for 5.3L/6.2L GM V8 Applications
| Fitment | Select Chevy/GMC 5.3L and 6.2L V8 models (specified years) |
|---|---|
| Filter type | Fine mesh aluminum |
| Included items | Hoses, custom brackets, fittings, installation instructions |
| Reservoir capacity | 3OZ |
This EVIL ENERGY air-oil separator is a compact catch can assembly intended to intercept oil vapor on the PCV side of the engine and return cleaner air to the intake. It uses a fine mesh aluminum filter to condense and capture oil, and the kit includes pre-routed hoses, custom brackets, fittings, and installation instructions to simplify swap-in mounting. In practice the unit is used inline between the crankcase and intake; owners report modest collection volumes after a few hundred miles and note the small reservoir requires regular checks and draining. The package leans toward straightforward, mostly plug-and-play installation, though some buyers replace the plastic hose fittings with heavier parts for long-term heat resistance and secure the mounting screws against backing out. The main limitations are the small 3 ounce reservoir and the supplied hoses, which some users say can degrade under high underhood heat, so expect periodic inspection and possible hose upgrades for heavy-duty driving or performance builds.
Best for: Performance-oriented owners who prioritize engine protection and cleaner intake air during spirited driving and expect a straightforward, mostly plug-and-play installation approach.
Less Ideal for: Drivers seeking a large-capacity or maintenance-free solution for extreme duty or long-interval service should consider a larger reservoir or a heavy-duty aftermarket unit tailored for high-heat applications.
- Includes custom brackets, hoses, and fittings for near-direct replacement installation
- Fine mesh aluminum filter captures fine oil vapor to reduce intake contamination
- Compact, milled housing with prelubed O-ring for a solid seal and tidy engine-bay fitment
- Many users report easy installation and effective oil separation on V8 engines
- Small 3 oz reservoir requires frequent checking and draining during regular use
- Some supplied hose fittings are plastic and may soften or fail under sustained high underhood heat
Verdict A compact, performance-minded catch can that provides effective oil separation and easy installation but needs frequent emptying and potential hose upgrades for heavy use.
4. ZNDAW 2-Port Aluminum Oil Catch Can Kit with Breather Filter and Drain Valve
| Capacity | 5 Fluid Ounces |
|---|---|
| Material | Aluminum |
| Fit Type | Universal |
| Includes | Breather filter, drain valve, adapters, O-rings, hose clamp |
This ZNDAW oil catch can is a budget-oriented kit that captures oil and water vapor from the PCV/valve cover vent to help keep the intake and intake valves cleaner. It installs inline between the crankcase ventilation and intake, using one of the included adapter fittings and a breather filter when a return to the intake is not desired. The 150 ml aluminum reservoir is baffled and includes a bottom drain valve for straightforward oil removal without disassembly. Practical details include multiple adapter sizes, O-ring seals for a leak-resistant fit, and a compact footprint for tight engine bays. As a cost-conscious option it offers durable aluminum construction and corrosion resistance, but the universal fit approach means you may need to choose the correct adapter and routing for a Mercedes-Benz GLA application and fabrication or bracketry might be required for an optimal, secure mount. Expect basic functionality and solid materials at an affordable price rather than a vehicle-specific, bolt-on solution.
Best for: Budget-conscious Mercedes-Benz GLA owners who want to reduce intake oil contamination without spending on a vehicle-specific catch can and who are comfortable selecting adapters and doing light custom routing or mounting.
Less Ideal for: Buyers seeking a direct-fit, vehicle-specific solution with integrated mounting or those who prefer a large-capacity can that needs less frequent maintenance.
- Billet aluminum body offers corrosion resistance and heat tolerance
- 150 ml baffled reservoir with drain valve allows easy, mess-free oil discharge
- Includes multiple adapter sizes and O-rings to fit a range of PCV and breather ports
- Compact design fits into tight engine bays common on the Mercedes-Benz GLA
- Universal fit kit is not vehicle-specific so mounting hardware or routing changes may be needed for a clean GLA installation
- Small 150 ml capacity will require more frequent checks on engines with heavy blow-by
Verdict A low-cost, durable universal catch can that cleans intake vapors effectively for Mercedes-Benz GLA owners willing to handle minor fitment and mounting work.
5. RALZAOTO Oil Catch Can Separator (anodized aluminum)
| Compatible engines | 5.3L & 6.2L |
|---|---|
| Fitment years | 2014-2018, 2015-2020 (vehicle fitment) |
| Exterior | Anodized |
| Model | Oil Separator |
This RALZAOTO oil catch can is a compact aftermarket separator that installs inline with the PCV plumbing to capture oil vapor before it reaches the intake. It is supplied with custom brackets, hoses, and fittings intended for a direct-fit installation, and the fine mesh aluminum filter inside captures condensed oil so the intake stays cleaner over time. Typical use is periodic inspection and draining every 500 to 1,500 miles depending on driving; many users report straightforward installs when factory hoses are flexible, though older stiff hoses can make routing trickier. The anodized aluminum body resists heat and pressure found in engine bays, and the kit is sized for vehicles with limited under-hood space. Limitations include a relatively small reservoir that will require more frequent draining on high-mileage or heavy-duty duty cycles and the package does not include printed instructions in all cases, which may challenge less experienced installers. For a risk-averse buyer seeking a simple, affordable way to reduce oil blow-by to the intake, it delivers practical results with minimal modification.
Best for: A cautious, risk-averse buyer who wants a straightforward, factory-quality minded upgrade to reduce oil vapor in the intake and prefers a mostly plug-and-play solution with minimal modification.
Less Ideal for: Drivers who regularly run heavy towing, constant high-mileage commuting, or extended track use and want a high-capacity or service-free system should consider larger or more service-oriented alternatives.
- Anodized aluminum construction resists heat and engine-bay conditions.
- Includes custom brackets, hoses, and fittings for direct-fit installation.
- Fine mesh aluminum filter captures oil vapor to reduce intake contamination.
- Compact footprint fits in tighter engine bays.
- Small reservoir capacity requires more frequent draining for heavier use.
- Some units ship without clear printed instructions which can complicate installation for novices.
Verdict A compact, budget-friendly catch can that makes a measurable reduction in intake oil contamination but needs regular draining due to its small reservoir.
6. TEMSONE Universal 2-Port 750ml Aluminum Baffled Oil Catch Can with Breather Filter
| Fit Type | Universal |
|---|---|
| Manufacturer | TEMSONE |
| Fuel Type | Gasoline |
| Capacity | 750 ml |
This TEMSONE catch can is a straightforward, budget-friendly unit that captures oil and vapor from crankcase ventilation before those contaminants reach the intake. It installs inline with the PCV/CCV hoses and uses an internal baffle plus a top breather to separate liquid from vapor; the included drain valve makes routine servicing simple. The 750 ml aluminum reservoir is larger than many economy cans, reducing how often you need to empty it, and the metal body and threaded fittings feel durable for an inexpensive part. The kit includes basic fittings and a breather but does not include lengthy reinforced hoses, so plan to source correct hose for installation on a Mercedes-Benz GLA. Some users report the internal brass screen can be restrictive on certain turbocharged engines, and winter condensation can reduce effectiveness in cold climates. Expect a pragmatic, mechanical solution that helps reduce carbon buildup at a low cost rather than a vehicle-specific, plug-and-play system.
Best for: A practical optimizer looking for the most engine protection per dollar who wants a durable, no-frills catch can to reduce intake contamination on a Mercedes-Benz GLA.
Less Ideal for: Drivers seeking a vehicle-specific, bolt-on Mercedes-Benz GLA kit with supplied hoses and precise fitment or those who prefer a thermostatic or electrically heated solution for severe winter use should consider alternatives.
- Large 750 ml reservoir cuts down on maintenance frequency
- Durable aluminum construction resists corrosion
- Includes breather filter and drain valve for easier installation and servicing
- Baffled internal design aids oil/vapor separation
- Universal kit requires sourcing proper hoses and fittings for Mercedes-Benz GLA installation
- Some units have a restrictive brass screen that may need modification for certain turbo engines
Verdict A roomy, well-built universal catch can that gives strong value for money for Mercedes‑Benz GLA owners willing to source hoses and do a modest amount of installation work.
7. EVIL ENERGY 300ml Baffled Oil Catch Can with 5ft NBR Hose Kit
| Capacity | 300 Milliliters |
|---|---|
| Hose length | 5ft (1.5m) |
| Hose inner diameter | 3/8" |
| Thread size | M16×1.5 |
This EVIL ENERGY kit is a compact, baffled oil catch can designed to collect oil vapor and moisture before they re-enter the intake. It installs in the crankcase ventilation line and can be used with or without the supplied breather filter depending on whether you retain the GLA’s factory PCV routing. The aluminum can and threaded cap feel solid and the removable baffle plus included stainless wool improve coalescing so liquid drains to the can instead of the intake. The kit includes M16x1.5 threaded ports and a 5ft NBR hose that is heat and wear resistant, but some owners route extra hose for cleaner installs. Practical benefits for a Mercedes‑Benz GLA include reduced intake valve and throttle-body gunk and an easier-to-service, visible reservoir for periodic draining. Limitations are the modest 300ml capacity which will require occasional checks on oil-prone or high-mileage engines, and the universal hardware may need bracket or hose-size changes for a neat, factory-like installation in the GLA engine bay.
Best for: A balanced all-round buyer who wants to protect a Mercedes‑Benz GLA’s intake from oil vapors without spending on a premium brand and values straightforward, serviceable hardware.
Less Ideal for: Drivers seeking a completely vehicle-specific, bolt-on solution with larger capacity and pre‑matched mounting hardware should consider dedicated GLA-specific kits instead.
- Baffled internal design with removable baffle and steel wool to improve oil/moisture separation.
- Solid aluminum construction and threaded cap provide a durable, serviceable can.
- Includes 5ft NBR hose rated for heat and wear for reliable routing in the engine bay.
- M16x1.5 threaded inlet/outlet fittings give a secure mechanical connection to hoses and adapters.
- 300ml capacity is relatively small and needs more frequent emptying on high blow-by engines.
- Universal fit kit may require additional hose, clamps, or bracket modification for a clean GLA-specific install.
Verdict A well-built, affordable baffled catch can that cleans crankcase vapors effectively for a Mercedes‑Benz GLA but may need extra hose or bracket work and more frequent draining due to its 300ml capacity.
Choosing the Right Mercedes-Benz GLA Oil Catch Can: Key Factors to Consider
Vehicle Fitment and Mounting
Correct fitment matters because tight engine bays vary by model year and trim. Confirming mounting points and bracket designs reduces the need for custom fabrication and helps maintain factory routing of PCV and breather hoses.
A catch can that includes a vehicle-specific bracket or adjustable mounting options saves installation time and reduces the risk of vibration-related loosening. Consider clearance around heat sources, access for draining, and whether hoses can be routed without kinking. Thinking about fitment up front also helps preserve engine bay appearance and avoids interference with other components during routine service.
Filtration and Separation Method
How the unit separates oil from vapor affects how much liquid and aerosol it traps. Baffle systems, mesh or filter media, and coalescing elements each have tradeoffs in capture efficiency and maintenance frequency.
Choose a separation approach that balances high capture rates for fine oil mist with manageable service intervals. Units that allow inspection of the element or provide a clear sight tube help you know when servicing is needed. Effective filtration reduces carbon deposits on intake components and helps maintain turbocharger performance by keeping oil out of the intake tract.
Capacity and Drain Design
Bigger reservoirs reduce the frequency of emptying, which is helpful for drivers who log long intervals between maintenance. However, overly large cans can be harder to locate and may require more complex mounting solutions.
Look for user-friendly drain options such as twist drains, quick-release valves, or easily accessible threaded plugs. A visible level indicator or clear collection cup makes it easier to judge when to service the can. Consider how easy it is to drain without removing the unit or risking spills in the engine bay.
Materials and Build Quality
Durable materials resist corrosion and withstand engine bay heat and exposure to oil and fuel vapors. Common construction options include billet aluminum, stainless steel, and high-temperature plastics, each offering different durability and weight characteristics.
Pay attention to the quality of fittings, hose barbs, and seals. Metal housings with machined fittings tend to be more robust for long-term service, while well-engineered plastic units can be lighter and still reliable. Good build quality reduces the chance of leaks and maintains consistent separation performance over time.
Hose and Fitting Compatibility
Proper hose diameter and secure fittings are essential to maintain crankcase breathing and prevent vacuum leaks. Check that included hoses and clamps match the engine's PCV and breather outlets to avoid improvised adapters.
Thread size standards or push-fit designs influence how simple the install will be. Reliable clamp types and secure swivel fittings reduce stress on hose ends and minimize the risk of detachment. Ensuring compatibility up front keeps the system sealed and functioning as intended.
Maintenance Accessibility
Routine service is unavoidable, so units designed for easy access lower long-term ownership friction. Features such as tool-free drains, removable internal elements, and straightforward mounting fasteners speed up servicing.
Consider how often the design requires cleaning and how clearly the collected oil level is indicated. Systems that allow you to inspect elements without disassembling the entire unit reduce the chance of skipped maintenance, which keeps separation performance consistent and protects engine components.
FAQ
What does an oil catch can do on a Mercedes-Benz GLA?
An oil catch can collects oil and condensate from the crankcase ventilation stream before it reaches the intake. That reduces oil deposits on intake valves and inside the intake tract, which can help maintain turbo responsiveness and lower the frequency of intake cleaning.
How often should I drain a catch can?
Drain intervals vary depending on driving style and engine condition, but many owners check levels every oil change or every few thousand miles. Vehicles with frequent short trips or high boost use may accumulate oil faster and need more frequent checks.
Will installing a catch can affect engine vacuum or PCV operation?
A properly designed and correctly plumbed catch can should not adversely affect PCV function. It is important to match hose diameters and use secure fittings so the system maintains proper crankcase venting and avoids introducing restrictions that could alter pressure.
Can I install a catch can myself on a Mercedes-Benz GLA?
Many catch cans are designed for DIY installation if you have basic mechanical skills and tools. Vehicle-specific brackets and clear routing instructions simplify the process. If you are unsure about hose connections or potential interference, professional installation can ensure correct fitment.
Does an oil catch can require special maintenance products?
Maintenance typically involves draining the collected oil and occasionally cleaning or replacing the internal element if present. Most services require only common tools and a solvent for cleaning. Avoid harsh chemicals that could degrade seals or filtration media.
How We Chose the Best Mercedes-Benz GLA Oil Catch Can
We evaluated units specifically for the Mercedes-Benz GLA using filters that reflect real-world ownership priorities. Primary criteria included fitment and mounting options to ensure easy installation in common engine bays, and filtration performance measured by separation method and micron rating or expected oil capture. We also considered build quality and materials, looking for corrosion-resistant housings and reliable seals, and ease of maintenance such as drain access and visible sight tubes. Compatibility with the vehicle breather and PCV routing, and whether a kit included necessary hoses and fittings, were also important. Quiet operation and minimal crankcase pressure disruption were additional checks. We excluded products that lacked clear vehicle-specific fitment data, used unproven separation methods, or had poor user-serviceable designs. The final list reflects a balance of installation practicality, engineering approach to oil separation, and owner-friendly maintenance features.
Our full evaluation process is outlined in our review methodology.
Conclusion
A good catch can for the Mercedes-Benz GLA balances correct fitment with effective oil separation and convenient servicing. Prioritize units that mount cleanly in the engine bay, use a proven separation method, and offer easy drain access so you maintain performance without frequent hassle. Recognize the tradeoffs between capacity, ease of installation, and long-term serviceability. Choosing a unit that aligns with your driving patterns and maintenance habits will deliver the most consistent benefits for intake cleanliness and turbo health.
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