This might come as old news to some, but it was just brought to my attention that thereÆs another oiled cotton element air filter option out thereà and this one might even be superior in design and function to the K&N.
(YouÆll have to decide that one for yourself):

[b]GREEN High Performance Air Filters[/b]



Isuzu Applications àààààààààà... Model Number àààà.ààà Price

2.6 àààààààààààààààààààààà #2092 ààààààààà.. $79.52
2.8 àààààààààààààààààààààà #2048 ààààààààà.. $53.55
2.2 àààààààààààààààààààààà #2116 ààààààààà.. $61.49
3.2 (SOHC) ààààààààààààààààà #2116 ààààààààà.. $61.49
3.2 (DOHC) ààààààààààààààààà #2116 ààààààààà.. $61.49
3.5 àààààààààààààààààààààà #2116 ààààààààà.. $61.49

Filter Cleaner & Oil Recharging Kit àààà #2000 àààààààààà $13.22



After reading about the differences between this filter and the K&N, I may just be ordering one of these things myself.


Cheers! <img src="/forums/images/graemlins/cheers.gif" alt="" />
Smiley

Who was it that brought this to your attention ? <img src="/forums/images/graemlins/smile.gif" alt="" />

Red vs. Green sounds like something the New Mexico state legislature needs to be deciding on <img src="/forums/images/graemlins/lol.gif" alt="" />

You know me....the skeptic.

1. I didn't see the comparison to K&N, just regular filters. Did I miss it on the 5-page PDF "Why go green?" They don't mention being over twice as expensive, either.

2. They say it's better for the environment to use this filter over and over rather than throw away paper filters and keep saying you should "Go Green" (implying an envirnmental benefit). Never mind all the oil you wash into the waste system (or directly into the ground water if you don't do it in the sink) as you oil and wash this thing over and over; oil helps keep seagulls shiney and waterproof.

3. They tell you that you know they're good because a couple of race teams use them. You know, people we pay to use our filters put them in their vehicles <img src="/forums/images/graemlins/rolleyes.gif" alt="" /> GreenAmigo has already painted his Amigo to match; he's a natural sponser.

4. Wow, a filter with pleats! Look at our pleats! Pleats! No one ever thought of that in a filter before. Pleats!

5. "It's colored green so even when it's dirty, it's green." Huh? How do you know it's dirty? Why not just say it, "It's colored green to distinguish ourselves from the guys we copied, K&N Red")

Nothing I see says it's any better than K&N and I got mine for $25 or $30 from PepBoys down the street. Here the 2.6 filter is $80 and I have to special order it.

Pleats.

They do have a nice catalog featuring lingere clad women holding the filters between their thighs. That took out some pleats. <img src="/forums/images/graemlins/ignore.gif" alt="" />

Wayne - True to form; you sure don't disappoint! <img src="/forums/images/graemlins/pfft.gif" alt="" />



The key differences as I observe them are as follows:

#1: Rather than having a single cotton gauze filtration element, theirs is woven and multi-layered.

#2: Theirs lists a particle filtration capability down to 5-microns, whereas nowhere in K&NÆs information have I ever found any sort of specific particle filtration rating of any kind.


Is theirs better than a K&N? --- I donÆt know.
Could it be better? --- Perhaps.
Is it worth the added expense? --- Maybeà If its capable of filtering-out even smaller particles than a K&N, then for my own purposes, IÆd have to say æYesÆ.


Cheers! <img src="/forums/images/graemlins/cheers.gif" alt="" />
Smiley

In K&N's faq I found this:

The price is waaaay high. Also K&N do just the job...and I wouldn't expect much performance gain from k&n swap to the green.

Yeah, but at what particle size, and what flow rate? A rock is a 100% efficient filter, but the flow rate is abysmal <img src="/forums/images/graemlins/wink.gif" alt="" />. For example, a HEPA filter, such as is required for asbestos and lead cleanup, is specified as filtering 99.97% of all particles down to 0.3 microns in size.

I have always suspected that a K&N does not filter small particles as well as a paper filter, but I have nothing to back that up. But I do know that a K&N works on a different capture principle than a paper filter. It is primarily an inertial impactor, where the particles impact the sides of the convoluted passages as they pass through the filter and are retained by the sticky oil. A paper filter works by simply having passages too small for the particles to fit through, although electrostatic attraction plays a role as well.

This means that a paper filter actually becomes more efficient as it becomes dirty, because the passages through the filter are getting narrowed by the caught particulates. But, this is at the cost of reduced flow rate. Whereas a K&N generally will retain most of its flow until it becomes very dirty, because the passages are larger.

I have also always wondered if the capture efficiency of the K&N-type sticky oil is as good at subzero temps as it is in warmer temps...I suspect not, but again have no hard data to back that up.

Man, I just love a good Can-O-Worms! <img src="/forums/images/graemlins/coolg.gif" alt="" />


This is exactly the sort of intelligent discussion that I was hoping to see... Keep `em coming! <img src="/forums/images/graemlins/kewl.gif" alt="" />


Cheers! <img src="/forums/images/graemlins/cheers.gif" alt="" />
Smiley

Originally posted at E-ZooZoo, by Mr_Mojo_65:

ôI was until just recently part of the K&N camp, but have recently
moved to the Green camp. I have no complaints about my K&N except
maybe the cotton element is a bit more fragile. Green claims to be
able to filter out to 5 microns right out of the box, whereas K&N
makes no claims as to filtration rates. They both work off the same
principles, the differences being that Green has IMHO a better cotton
design/idea than K&N. K&N is a gauze type, whereas Green is woven
cotton of different thicknesses. I have also read elsewhere that Ford
doesnt allow K&N on some of their diesels, or you will void the
warranty, but they do allow Green. I'll see if I can confirm this.ö



Thereà
Now you can take the heat! <img src="/forums/images/graemlins/nana.gif" alt="" />


<img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" />


Cheers! <img src="/forums/images/graemlins/cheers.gif" alt="" />
Smiley

The oil does more than just make the cotton sticky . The oil also attracts particles by chemical attraction, kinda like a magnet. Oiled filters work better dirty also. I just recently replaced my old K&N with a Green and the Green was actually less expensive here locally than the K&N, but not by much. Upon inspection the Green is manufactured to a much higher quality than my old K&N and seals much better in my stock airbox. There is also a claim out there that Ford will revoke your warranty on some of their diesels if you use a K&N but they are OK with the Green. This claim needs to be substantiated tho. I dont see any scientific reason why cold oil shouldnt work. If the oil freezes on the filter imagine whats happening to your engine oil before startup !!!!!