Oil Catch Can Maintenance: What to Plan Before You Install One
An oil catch can adds a service item under the hood. Here’s how to plan fitment, access, inspections and maintenance before choosing a kit for your truck.
An oil catch can can look like a small addition to the engine bay, but it adds another part you’ll need to inspect and service. Before buying one, we’d ask two questions: is this the correct kit for the engine, and will you keep up with the maintenance it requires? Both matter more than the finish on the reservoir.
Know what the kit is intended to do
An air/oil separator collects oil carried through the crankcase ventilation plumbing. The K&N 81-0800 oil separator is a vehicle-specific example in our catalog, with a removable reservoir and factory-style hose connections. K&N describes its purpose and service access on the 81-0800 product page.
We would treat it as an additional maintenance component, not a repair for an unidentified engine problem. If your truck has unusual oil consumption, smoke, warning lights or a ventilation fault, have that condition diagnosed first. Buying an accessory before understanding a problem can leave you with the same problem and another item to maintain.
Check the engine and the instructions, not just “F-150”
The manufacturer’s 81-0800 installation document lists specific engines and model years, including 2011–2023 F-150 3.5L EcoBoost applications. It also identifies other selected Ford applications. Don’t extend that coverage to every engine or newer truck simply because the hose connectors look familiar.
Read the whole document before scheduling the work. This particular instruction sheet lists a drill and drill bit among the required tools. That is why we do not describe every catch-can kit as a no-drilling installation. Confirm the mounting method for your application and make sure you’re comfortable with the actual steps, required equipment and access.
Application restriction: K&N identifies 81-0800 as not legal for sale or use in California on pollution-controlled motor vehicles. Check the current manufacturer listing and the requirements that apply to your vehicle and location before ordering. This guide does not establish approval for another jurisdiction or modified configuration.
Make service access part of the buying decision
Look at the proposed location with the engine cool and ask how you will reach the reservoir once the kit is installed. Consider other modifications and nearby service points. If routine access looks awkward now, it probably won’t become more appealing on a busy weekend. We’d rather see a carefully planned installation than a good-looking part that never gets checked.
Keep the manufacturer’s maintenance instructions with your vehicle records. Use its specified inspection and emptying procedure; don’t borrow a fixed interval from someone driving a different engine in a different climate. Record the date, mileage and observations each time you service it. A simple note on your phone is enough to make the next inspection more informed.
Have your installer show you the service points and explain how the system should look when reassembled. If you’re unsure about a connection, damaged component or unexpected change, ask before continuing to use the setup. Maintenance should preserve the intended ventilation routing rather than introduce an improvised open vent.
Our pre-order checklist
- Confirm year, engine size and the manufacturer’s exact application.
- Review the current emissions restrictions before purchase.
- Read the mounting steps and tools list, including any drilling requirement.
- Check access for inspecting and emptying the reservoir.
- Plan who will install it and who will perform routine service.
- Keep installation instructions and service records together.
Common questions
Does a catch can replace oil changes?
No. Continue the vehicle manufacturer’s oil and filter service schedule. The separator is an additional service item, not an alternative to normal engine maintenance.
Can I use one interval for every vehicle?
We wouldn’t recommend a universal interval. Follow the exact kit’s instructions and check with the manufacturer when your use or conditions are not covered.
Can you confirm the kit for my F-150?
Contact us with the year, engine and any relevant modifications. We can check the part application and point you to the instructions before you decide whether the added maintenance suits your truck.
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