K&N Drop in filter question (for those who bought them)

chalmene

Considering these filters, do they come pre-oiled or will I need to oil them off the bat?

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old guy

Pre oiled

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BettyZ

If by "pre-oiled" you mean "return them and buy Z1 cold air intakes", then yes.

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Quicksilvers

Yes they come pre-oiled already when new. When it is time for you to clean your K&N air filters after they are dry then reoil them but don’t over oil them.

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Chuck33079

All of the K&Ns I've bought have come over-oiled. Let is sit on some paper towels overnight before you install.

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Rusty

The last thing you want to do when reoiling the K&N filters is to over oil. A light coating will do. When you over oil. The oil gets sucked into the inlet pipes and manifold. Plus it coated the MAF sensors and throttle body blades too. Leading to other issues. I clean mine once a year. When I park it for the winter.

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Quicksilvers

To each in their own experience. All the K&N air filters I purchased new appeared to be pre-oiled the correct amount. Once every year I use the K&N recharge kit and clean and oil my air filters. Some of the benefits are better fuel mileage, cleaner intakes,make more power etc. I have seen from my tuner that the installation of K&N air filters on our cars will make power I’ve seen 1-5 whp nothing you will ever actually feel though on the butt dyno.

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stansens

Bought mine on sale when car was new. They have 4 years of use and 34k kilometres of use and show very little dirt. They have provided a slight increase in power and have never set a dtc code. A good buy in my opinion. I kept the oem filters just in case all of the complaints on this forum might come true. Use very little oil when cleaning and recharging as per all of the comments and you should be fine for many years.

370zBoyz

good thing about these filters is you don't have to buy new ones ever again and paired with the Z1 tubes they work well

sold mine to upgrade to the stillent gen iii but had no issues with them

Sierra

I recently bought a couple of K&N filters and fitted them. After about 1,000km there was a CEL resulting from the mixture going out of range on one bank.
When I checked I found one of the filters had so much oil it was draining out into the filter housing.

I cleaned the housing, intake hose, both MAF sensors and put the stock filters back in, then had the Nissan dealer reset the fueling.

I've cleaned the filters and will lightly oil them when they're dry but i'm pissed off with K&N for being incapable of doing such a basic task correctly.

I bought a K&N filter for my other car[i20N] but returned it because the manufacturing was so bad the adhesive used had compromised the effective area available for the air flow.

filip00

Surprised to hear people have issues with drop in K&N filters. I'm using those on all my cars for the last 10+ years, never had any issues.

When I wash them, I just make sure to give them a thorough clean, thorough dry, and then lightly spray it with regular oil. Simple as that.

I am sad to hear that obviously they have dropped their quality, I don't remember them being that bad.

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stube40

I am just about to get an Uprev tune from an experienced tuner and his thoughts were that I wouldn't see much benefit from a major intake upgrade (eg Stillen Gen II) and to just replace stock paper filters with the K&Ns since in his experience they have been a really good product with good results that are cost-effective.

Saying that, if they are overloading the filters with oil at the start then maybe he's not in the loop with what happens after a few 1000 miles when the oil starts to get pulled through the intakes.

So it makes me wonder whether you should clean all the excess oil off of brand new K&Ns right at the start? In fact, I think someone earlier in this thread said the same thing?

filip00

I currently run them at two cars at home, and none seemed to come with too much oil from the factory.

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ZoomZ

You can run K&N filters dry. Not sure if its a good idea but there are plenty of dry filter options out there.

Having said that, if worried, a light oil coat is all you need. Will that do much and are you wasting money on the oil kit? or just keep it dry.

Perhaps the dry filter options use a tighter weave or other materials to achieve the same thing. Not sure.

Hers one example. Looks the same as a KN but again, maybe different materials:

https://afepower.com/afe-power-31-10...y-s-air-filter

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