Hands-on Review: K&N Oil Catch Can for 14-20 Chevy 1500 (5.3L & 6.2L Gas)

Look, if you drive an EcoTec3 V8 truck, you've probably heard about the absolute mess that is crankcase blow-by. Modern direct-injection gas setups constantly recirculate dirty crankcase air right back into your intake. What you get from that over time is a sticky layer of carbon baked onto your intake valves, which slowly kills your fuel economy and hurts your throttle response. This K&N oil separator is built to step right in and intercept that sticky oil mist, catching it inside a heavy-duty canister before it gets anywhere near your clean top-end components.When you look at dialing in your truck's layout—whether that means changing up your exterior style with clean parts like Kuryakyn Phantom Mirrors to get a sharper look or keeping your engine healthy under the hood—spending money on parts that actually do their job is everything. This system bolts right up into your engine bay, taking the place of your stock crankcase line. It catches all that sludge in a clean aluminum reservoir so your motor only breathes clean air, helping you avoid annoying engine knock down the road.

A Massive 6-Ounce Canister with No-Tool Maintenance

One thing I really like here is that K&N didn't skimp on size. They used a large 6-ounce reservoir capacity, which is roughly double what you get with those tiny, generic 3-ounce generic catch cans online. That means you aren't stuck under the hood emptying it out every single week. When it does get full, you don't even have to hunt down a wrench. The bottom half just unscrews smoothly by hand. Plus, the kit comes out of the box with proper OEM-style quick-connect fittings that click straight onto your factory lines without any annoying cutting.

Why This Kit Actually Matters

• Stops carbon buildup dead: Keeps greasy oil vapors out of your intake manifold, keeping your valves clean and saving you from rough idles.
• Holds twice as much fluid: The 6oz black aluminum canister requires way fewer garage checks than standard compact setups.
• No cutting or splicing required: True factory-style snap connectors mean you just click the new hoses straight into place.
• Unscrews completely by hand: You can dump the trapped oil during your normal service stops without touching a tool.
• Protects your engine's power: By keeping dirty oil mist out of the cylinders, it stops dangerous pre-detonation and power loss.

Exact Vehicle Fitment Information

This specific kit is engineered to bolt straight onto 2014 to 2020 Chevrolet Silverado 1500 trucks running the 5.3L or 6.2L V8 gas engines. It also works perfectly on 2015-2020 Chevy Suburban and Tahoe models, alongside 2014-2018 GMC Sierra 1500 trucks with those same gas powerplants. Just keep in mind that this is designed strictly for gas motors and won't fit any diesel truck variants.

• Manufacturer: K&N Engineering
• Official Part Number: 81-0805
• Inventory SKU: knn81-0805

Common Questions from Truck Owners

Is it difficult to install this catch can in a driveway?

Not at all. It takes most guys about 20 or 30 minutes at most. Since K&N includes custom brackets and factory-style quick-disconnect fittings, you just need a couple of basic sockets to bolt it down. No drilling or permanent cutting needed.

How often do you really have to empty the reservoir?

It depends on your mileage and weather, but since it has a larger 6-ounce container, you usually only need to unscrew the base and dump the trapped oil whenever you do a standard engine oil change.

Can I legally use this kit in California?

No, this specific K&N 81-0805 kit does not carry a CARB exemption number right now. Because of local emissions regulations, it isn't legal for street use or installation on registered vehicles out in California.