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If you drive a Ram 3500, managing crankcase vapors can help preserve intake components and maintain peak performance. Choosing the right Ram 3500 oil catch can reduces the amount of oil and sludge that recirculates into the intake, which matters for engine life and turbocharger health if your truck is turbocharged. This guide covers a short list of top-rated options for the Ram 3500, chosen for fitment, separation performance, and serviceability. Below we explain why those criteria matter and how each shortlist item stands out in those areas before the product list.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | BOMLING Billet Oil Catch Can Kit with Z‑Bracket for 6.4L/5.7 HEMI |  |
| Most Popular A crowd favorite that many people choose with confidence | SPEEDWOW Universal Oil Catch Can Kit, 300ml |  |
| Best Quality Built to a higher standard if you want something more solid | EVIL ENERGY 300ml Baffled Oil Catch Can with 3/8" NBR Hose Kit |  |
| Best Budget The cheapest option that still gets the job done reliably | WENJTP 150ml Universal Baffled 3-Port Oil Catch Can Kit |  |
| Most Sold A high-volume bestseller chosen again and again | RANSOTO Billet Oil Catch Can with Z-Bracket for 5.7L/6.4L HEMI |  |
| Best Value for Money The sweet spot between price and what you get | muge racing Universal Baffled Oil Catch Can Kit, 400 ml |  |
| Best Overall The best all-around choice for most situations | EVIL ENERGY Air Oil Separator (Oil Catch Can) for F-150/EcoBoost/Raptor — 3oz |  |
1. BOMLING Billet Oil Catch Can Kit with Z‑Bracket for 6.4L/5.7 HEMI
| 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 vapor before they reenter the intake, helping keep the PCV system and intake tract cleaner on compatible HEMI engines. It installs in the PCV/UPR plumbing using the supplied Z‑bracket, billet hose ends, and forged fittings; hoses are provided but must be cut and routed to fit. The can condenses oil vapor into a 4‑ounce reservoir with internal baffling and a diffuser to let only cleaner air pass back to the intake. In practice it reduces sludge buildup and is easy to drain during routine maintenance, though the small reservoir means more frequent checks on hard‑used or leakier engines. Installation can be fiddly in tight engine bays and some owners remove the large engine cover for fitment. Overall it is a cost effective, vehicle‑specific option for owners wanting a factory‑style capture solution without complicated plumbing changes.
Best for: Reliability‑focused HEMI owners who prioritize protecting the intake and PCV system with a straightforward, vehicle‑specific capture solution and routine maintenance.
Less Ideal for: Drivers who want a maintenance‑free, large‑capacity system or a plug‑and‑play unit that never requires cutting hoses or engine cover modification should consider larger universal options.
- Vehicle‑specific fit and Z‑bracket make mounting straightforward for supported HEMI engines.
- Billet construction and forged fittings give a more durable, OEM‑style appearance and connection security.
- Internal baffle and diffuser design improves oil separation so less vapor reaches the intake.
- Includes hoses and fittings so no additional parts are required for a basic install.
- Small 4 ounce reservoir requires more frequent draining on high blow‑by or heavy use.
- Hoses may need trimming and clamps or zip ties for a secure install, which can add fiddly work.
- May require removal of the factory engine cover for proper clearance on some models.
Verdict A budget‑friendly, billet catch can tailored for HEMI engines that improves long‑term reliability but needs regular draining and some careful installation.
2. SPEEDWOW Universal Oil Catch Can Kit, 300ml
| Fit Type | Universal Fit |
|---|---|
| Fuel Type | Gasoline |
| Item Weight | 2 pounds |
| Model | Reservoirs |
This SPEEDWOW oil catch can is a compact, universal baffled reservoir intended to intercept oil and moisture from the PCV/CCV system before it reaches the intake. It installs using the included aluminum bracket, NBR 3/8" hose, clamps, and fittings and is drained via a removable bottom or the built-in dipstick. In practice it collects condensate and light oil carryover, which helps limit carbon buildup on intake components and can be especially useful on trucks used for heavy towing. The removable baffle and replaceable micron filter let you tune filtration, and the dipstick doubles as a convenient drain port so you can empty the can without disturbing mounting. Expect a straightforward DIY install in a Ram 3500 engine bay but plan to reposition the bracket and use stronger hose clamps or small adapter fittings if factory ports differ. Also check the labels and filter orientation before final assembly and clear the can regularly in winter to avoid condensation freeze.
Best for: Convenience-driven buyers who want a simple, mostly complete catch can kit they can fit themselves to reduce intake contamination on a working Ram 3500 without a lot of parts sourcing.
Less Ideal for: Those seeking a vehicle-specific, bolt-in solution or a large-capacity racing-grade can should look for purpose-built Ram 3500 kits or higher-capacity units designed for extreme blow-by.
- Compact baffled design captures oil and moisture before it reaches the intake
- Includes dipstick and removable bottom for easy level checks and draining
- Supplied hose and clamps eliminate the need to buy extra plumbing for many installs
- Removable baffle and bronze micron filter allow basic customization of filtration
- Bracket and some supplied clamps may be too stiff or weak for final mounting and could require aftermarket clamps or a custom bracket
- Small 300ml capacity means frequent emptying under heavy blow-by or towing
- Markings and arrow orientation have been reported inconsistent so double-check flow direction before install
Verdict A ready-to-install, budget-friendly baffled catch can that’s convenient for DIY Ram 3500 owners but may need stronger clamps or a custom bracket for a robust, long-term fit.
3. EVIL ENERGY 300ml Baffled Oil Catch Can with 3/8" NBR Hose Kit
| Capacity | 300 Milliliters |
|---|---|
| Hose length | 5 ft (1.5 m) |
| Hose ID | 3/8" |
| Port thread | M16×1.5 |
| Fuel Type | Gasoline |
This EVIL ENERGY catch can is designed to trap oil and moisture from PCV/CCV ventilation before those contaminants reach the intake, helping reduce valve and intake carbon buildup on a Ram 3500. The 300 ml aluminum can uses a removable baffle and supplied steel wool to improve coalescing so you collect condensate and oil rather than letting it recirculate. It ships with an M16*1.5 threaded inlet/outlet, a 5 ft NBR hose rated for heat and wear, clamps, and a universal mounting bracket for under-hood installation. In practice the unit is compact enough to fit in tight engine bays and the threaded canister unscrews for straightforward draining and servicing. Expect simpler installs on older or modified Rams where you can route hoses between PCV ports; some buyers needed extra hose length or different fittings for a clean routing on specific engines. In cold climates the manufacturer warns about moisture freezing and recommends more frequent cleaning or reinstalling factory routing when necessary. The can is a practical, performance-focused add-on to help preserve intake cleanliness, provided you verify fitment and hose routing for your 3500 before installation.
Best for: Performance-oriented Ram 3500 owners seeking a compact, effective way to reduce intake oil contamination and protect long-term engine performance.
Less Ideal for: Buyers who want a vehicle-specific plug-and-play solution or who prefer a larger capacity or pre-fitted kit tailored to their exact engine plumbing.
- Baffled internal design with steel wool improves oil separation and reduces intake contamination.
- Compact 300 ml size fits tight engine bays and is easy to service by unscrewing the can.
- Includes 5 ft NBR hose that resists heat and wear for reliable routing under the hood.
- M16x1.5 threaded ports and supplied mounting bracket allow a secure, engine-bay installation.
- Universal fittings may not match Ram 3500 PCV plumbing without additional adapters or hose.
- Bracket geometry can require modification to achieve a clean, serviceable mount in some engine bays.
- 300 ml capacity means more frequent draining on heavily used or high-blow-by engines.
Verdict A compact, well-designed baffled catch can that helps keep a Ram 3500 intake cleaner, but plan for fitting or hose adjustments for perfect installation.
4. WENJTP 150ml Universal Baffled 3-Port Oil Catch Can Kit
| Capacity | 150 Milliliters |
|---|---|
| Ports | 3 ports (2 inlets, 1 outlet) |
| Material | 6061 Aluminum |
| Fit Type | Universal |
This WENJTP 150ml oil catch can captures crankcase oil and moisture before they re-enter the intake, using an internal baffle and a low-micron bronze filter to separate contaminants. It is typically installed in the PCV/boost return lines on a project or work truck to reduce carbon buildup and keep intake and valves cleaner. The kit includes a three-port body (two inlets and one outlet), several adapters, a 360 degree adjustable bracket for flexible mounting and a bottom drain valve for easier servicing. Its small 150ml capacity makes it quick to empty and simple to tuck into tight engine bays, but it also means more frequent checks on high-blow-by engines. Build quality is solid for the price with 6061 billet aluminum construction and anodized finish, though some users report tight threads and limited adapter fitment requiring extra sealant or hose selection. For Ram 3500 owners looking to add a budget-friendly catch can, this offers effective filtration and easy installation with the expected compromises of a compact, universal unit.
Best for: Budget-conscious Ram 3500 owners who want basic crankcase oil separation to reduce intake contamination without spending much, and who prioritize value over high capacity.
Less Ideal for: Not suitable for owners seeking a high-capacity or vehicle-specific factory-quality solution or those who want a plug-and-play kit with guaranteed OEM-style fitment.
- Baffled internals and low-micron bronze filter increase oil and contaminant separation.
- Compact 150ml size fits tight engine bays and is easy to service.
- Includes adjustable mounting bracket and multiple adapters for flexible installation.
- 6061 billet aluminum construction with anodized finish for durability at a low price.
- Small 150ml capacity requires more frequent draining on high-blow-by or work engines.
- Included fittings and threads can be tight or inconsistent, sometimes needing additional sealant or fittings.
- Mounting hardware quality is basic and may need upgrading for long-term vibration resistance.
Verdict A very affordable, compact catch can that delivers solid filtration for Ram 3500 owners on a budget but trades capacity and some fitment refinement for the low price.
5. RANSOTO Billet Oil Catch Can with Z-Bracket for 5.7L/6.4L HEMI
| Compatible engines | 2011+ 5.7L and 6.4L HEMI |
|---|---|
| Material | T6061 billet aluminum |
| Mounting | Z-style bracket |
| Drain | Knurled tool-free bottom drain |
This RANSOTO catch can captures oil vapor and moisture from the PCV system to reduce intake-valve and manifold carbon buildup on 5.7L and 6.4L HEMI engines. It is CNC-machined from T6061 billet aluminum and uses a Z-style bracket to place the can in an accessible location for draining. The kit ships with hoses, clamps, and mounting hardware and features a knurled, tool-free drain at the bottom for routine maintenance. In real-world use the can provides a visible reservoir for trapped oil and gunk, making it easy to confirm the system is doing its job and helping protect long-term engine health. Installation can require minor fitment choices depending on factory components and some owners replace or re-route supplied hoses or fasteners for a cleaner fit. A few users also noted tight clearances on some engine bays and that the included fittings sometimes need different clamps or a shorter bolt to avoid interference.
Best for: A risk-averse mainstream buyer who wants a factory-quality preventive upgrade to reduce intake carbon buildup and prioritize long-term engine reliability.
Less Ideal for: Drivers seeking a completely plug-and-play, guaranteed-fit solution without any minor adjustments or those unwilling to modify supplied hoses or fasteners during installation.
- Billet T6061 aluminum construction for durability and a finished engine-bay appearance
- Z-style bracket positions the can for easier access and routine draining
- Knurled bottom drain allows tool-free emptying and quick maintenance
- Includes hoses and hardware for a mostly bolt-on installation
- Kit hoses and supplied fastener sizes may not fit perfectly and sometimes require replacement or additional clamps
- Tight engine-bay clearance on some applications can make installation or draining awkward
Verdict A well-made billet catch can that protects HEMI engines and appeals to cautious owners, though expect to tweak hoses or fasteners for a perfect fit.
6. muge racing Universal Baffled Oil Catch Can Kit, 400 ml
| Fit Type | Universal |
|---|---|
| Capacity | 400 ml |
| Material | Aluminum |
| Included adapters | Three sizes with o-ring gaskets |
This muge racing baffled oil catch can is a budget-friendly add-on for keeping crankcase vapors out of the intake on a Ram 3500. The 400 ml aluminum reservoir and internal baffle condense vapors into liquid, which collects at the bottom for periodic draining, while the included breather filter lets you run it as an open vent or install the plug to keep the system sealed. The kit ships with three adapter sizes and o-ring gaskets to fit a range of hose connections and a dipstick for quick level checks without disassembling the can. Practical details like reinforced hose clamps and a polished finish make it straightforward to mount under the hood, though several owners note the supplied hose is thin and short and the stock mounting bracket may need modification. Expect to replace the provided hose and be careful with the top vent on applications that are sensitive to vacuum leaks. For a Ram 3500 this unit gives the basic functionality you want at a low cost, but a few simple upgrades will improve long term reliability.
Best for: Practical optimizers who want an affordable, functional oil catch can for routine protection of a Ram 3500 intake without paying for high-end billet kits.
Less Ideal for: Owners seeking a turnkey, vehicle-specific engineered solution or those unwilling to replace flimsy hoses and modify the mounting hardware should consider more robust, purpose-built kits.
- Baffled 400 ml reservoir that condenses oil vapor into collectable liquid
- Aluminum construction with an anodized finish for light weight and corrosion resistance
- Includes multiple adapter sizes with o-ring gaskets to fit varied hose ports
- Option to run as vented with breather filter or sealed using the provided plug
- Built-in dipstick and reinforced hose clamps for easier maintenance and leak prevention
- Supplied hose is thin and short and often needs replacement with heavier fuel hose
- Mounting bracket placement and hole spacing may require fabricating or modifying a bracket
- Top breather can create vacuum leaks on some engines if used as an open vent
Verdict A low-cost, functional catch can that protects a Ram 3500's intake if you plan to replace the supplied hose and adjust the mounting for a reliable installation.
7. EVIL ENERGY Air Oil Separator (Oil Catch Can) for F-150/EcoBoost/Raptor — 3oz
| Compatibility | 2011–2025 F-150 5.0L, 3.5L EcoBoost, 2.7L EcoBoost; 2017–2025 Raptor 3.5L; 2018–2021 Expedition 3.5L |
|---|---|
| Capacity | 3oz |
| Filter | Fine mesh aluminum |
| Mounting | Includes custom bracket and quick connect fittings |
This EVIL ENERGY air oil separator is a purpose-built catch can that traps oil vapor and contaminants from the PCV system to reduce intake valve and intake tract deposits. It installs between factory PCV hoses using the included aluminum quick-connect fittings, custom bracket and hoses, so fitment is straightforward for supported vehicles and requires minimal modification. The unit uses a fine mesh aluminum filter and a baffled, rotatable base that unscrews for draining, plus an O-ring seal to minimize leaks. In practice it captures condensate effectively, keeps oil out of intake plumbing and simplifies periodic drain maintenance compared with ad-hoc venting. A few users note the drain cup threads can seize if not lubricated, and the bracket clearance is tight on some engine bays which can make unscrewing the cup awkward. Also the 3 oz capacity means more frequent checks on high-mileage or heavy-duty use compared with larger aftermarket tanks. For a balanced buyer this offers near-factory fitment and solid filtration at a modest size and price point.
Best for: Balanced owners who want a practical, near-factory replacement that reduces PCV oil contamination without extensive modification or premium cost.
Less Ideal for: Drivers who need a large-capacity solution for extremely heavy-duty or commercial duty cycles should consider larger tanks or professional-grade separators.
- Vehicle-specific fitment parts included for simpler installation on supported engines
- Fine mesh aluminum filtration and baffled design to capture small oil vapors
- Rotating base with O-ring seal for easier drainage and leak resistance
- Aluminum construction and supplied bracket match engine-bay aesthetics
- Small 3 oz reservoir requires more frequent draining under heavy use
- Drain cup threads can seize without anti-seize or lubrication
- Bracket sits close to the can on some installs which can make removal awkward
Verdict A well-priced, vehicle-focused catch can that balances effective filtration and easy fitment, but with a small reservoir that needs regular draining.
Choosing the Right Ram 3500 Oil Catch Can: Key Factors to Consider
Compatibility and Fitment
Making sure the catch can fits the Ram 3500 is the first priority. Correct fitment affects whether hoses reach without kinking and whether the unit can be mounted securely away from heat sources and moving parts.
Look for mounting options and bracket designs that match the truck’s engine bay layout. Compatibility also covers inlet and outlet orientations and hose diameters so you do not need complex adapters during installation.
Separation Efficiency
Separation efficiency determines how much oil and condensate the catch can removes from crankcase vapors before they re-enter the intake. Better separation reduces intake coating, valve deposits, and oil reaching the turbocharger compressor.
Check for multi-stage baffles, coalescing media, or internal baffling designs that promote droplet capture. Higher efficiency often means less frequent draining and a cleaner intake over time, which can help preserve performance and reduce maintenance on related components.
Reservoir Capacity and Serviceability
Reservoir size influences how often you need to drain the unit. A larger reservoir is useful for heavy-duty use or long intervals between service, while a smaller one can be lighter and easier to tuck into tight spaces.
Serviceability covers drain access, clear sight indicators, and ease of disassembly. A visible level indicator or clear bowl lets you monitor accumulation without tools. A convenient drain valve or magnetic plug speeds routine maintenance and minimizes spill risk.
Materials and Durability
Materials affect longevity under hood heat, vibration, and exposure to oil and fuel vapors. Corrosion-resistant metals or high-temperature plastics extend life and reduce the chance of leaks or cracking.
Pay attention to the quality of fittings, threads, and seals. Stainless steel hardware, anodized finishes, and reinforced hose fittings resist degradation. Durable construction also helps maintain a reliable seal under pressure variations and thermal cycling.
Installation Complexity and Hardware
Installation complexity affects whether you can complete the job with basic tools or need specialist equipment. Some kits include vehicle-specific brackets and hoses, which simplifies mounting and routing on the Ram 3500.
Consider whether the kit provides clearly labeled inlet/outlet ports and includes clamps and fittings sized for your truck. Instructions that show routing options for common engine layouts reduce guesswork and lower the chance of vacuum leaks or improper connections.
Maintenance Requirements
Maintenance frequency and steps impact long-term ownership convenience. Units that are easy to inspect and drain reduce the chance of neglect and the accumulation of corrosive sludge.
Understand recommended service intervals and whether the design allows for quick cleaning of internal baffles or replacement of filters. Low-maintenance designs with straightforward access encourage regular checks and better long-term protection for the engine and intake system.
FAQ
How does an oil catch can help a Ram 3500?
An oil catch can captures oil and condensate from crankcase and PCV vapors before they reach the intake. This can reduce buildup on intake valves and in the intake tract, which may help maintain airflow and reduce deposits that can affect engine efficiency over time.
Can I install an oil catch can myself on a Ram 3500?
Many owners can install a catch can with basic hand tools if the kit includes vehicle-specific brackets and hoses. Installation difficulty depends on engine layout and available space. If plumbing requires routing near hot components or tight areas, professional installation is a reasonable option.
How often should I drain the catch can?
Drain intervals vary with driving style and engine condition. Heavy towing or frequent idling typically increases accumulation and may require more frequent draining. Inspect the reservoir regularly, and empty it before it reaches capacity to maintain separation performance.
Will a catch can affect engine vacuum or performance?
A properly installed catch can should not significantly affect engine vacuum. It must be plumbed according to the vehicle’s PCV and crankcase routing and use appropriately sized hoses and fittings. Incorrect installation or restrictive internal design could alter pressures, so follow recommended guidelines.
Are there special considerations for turbocharged Ram 3500 engines?
Turbocharged engines often benefit from effective oil separation because oil entering the intake can reduce compressor efficiency and deposit on the intake tract. Use a catch can designed to handle the higher blow-by volumes and thermal conditions that are common with turbocharged applications.
How We Chose the Best Ram 3500 Oil Catch Can
We started by focusing on units that explicitly list compatibility with the Ram 3500 and have mounting solutions that match the truck's engine bay layout. Key filters included connection types compatible with the vehicle’s PCV and crankcase ventilation routing and clear guidelines for plumbing and routing during installation. Performance criteria prioritized oil separation efficiency under real-world driving conditions and the ability to handle blow-by volumes typical of heavy-duty gasoline and diesel applications. Build quality and materials were assessed for corrosion resistance, secure mounting, and durable fittings. Serviceability also mattered: we looked for accessible drains, clear sight indicators, or easy-to-remove reservoirs to minimize routine maintenance time. We excluded units that lacked credible fitment information, had ambiguous inlet/outlet directions, or used materials unsuited to under-hood exposure. Units intended only for small engines or unrelated ventilation systems were not considered. The final selection balances proven separation performance, robust construction, and practical install and service features for the Ram 3500.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a Ram 3500 oil catch can, prioritize fitment, separation efficiency, and ease of maintenance. Those factors determine how well the unit protects the intake and how much ongoing effort you will need to keep it working. Balance reservoir capacity and material durability against installation complexity. Selecting a unit that matches your truck’s engine layout and service habits will deliver the best long-term protection and the fewest surprises during maintenance.
