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Old March 3rd, 2007, 01:43 PM   #1
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Default What's the best air filter?

Can't remember where I read this. But, someone said they put a new air filter in their Jeep and it improved performance and mileage a little. Is that true? If so, what do you recommend for a

2004 Grand Cherokee Laredo 4x4 V6 4.0L?
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Old March 3rd, 2007, 02:15 PM   #2
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a new one
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Old March 3rd, 2007, 02:41 PM   #3
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Just don't buy the cheapest one in the store. The Mopar one we got for the Libby is much better than the schmuck brand it used to have.
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Old March 3rd, 2007, 02:43 PM   #4
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Are K&N any better? Worth the extra money?
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Old March 3rd, 2007, 02:46 PM   #5
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Are K&N any better? Worth the extra money?
yeah they are worth it only because you can clean them and reuse them.
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Old March 3rd, 2007, 04:13 PM   #6
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Are K&N any better? Worth the extra money?

No there not worth it . To start with there an oil based air cleaner , todays sensor riddle autos do not like oil coming through the intake system .

Performance difference is going to be so minimal you will never recope the cost of the air filter . petersens mag did some testing on these type items for fuel v's cost and nothing was really worth the money it cost .

Go get a Fram air hog .
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Old March 3rd, 2007, 04:17 PM   #7
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I use this trueflow because the K&N allowed too much dirt into the airtube.
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Old March 3rd, 2007, 04:22 PM   #8
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K&N has the best marketing department. Their filters don't really stand up to use. The biggest complaint with K&N is letting too much dirt through. After using a K&N, wipe a white cloth on the inside of the airtube. The truth is in the dirt. This is either due to design or improper oiling depending on if you are the consumer or manufacturer.
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Old March 3rd, 2007, 04:27 PM   #9
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Heres another take on the dirt . Any filter will let some dirt past . K&N also leaves the oil you speak of so the dirt sticks where you can find it . With out the oil residue it went into your motor . What is left in the tube is not really the point .

Dont take me wrong the minor amount the oil residue caused to stick in the air tube is nothing compared to the amount that went on down the tube so to speak .
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Old March 3rd, 2007, 04:39 PM   #10
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Quote:
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No there not worth it . To start with there an oil based air cleaner , todays sensor riddle autos do not like oil coming through the intake system .

Performance difference is going to be so minimal you will never recope the cost of the air filter . petersens mag did some testing on these type items for fuel v's cost and nothing was really worth the money it cost .

Go get a Fram air hog .
I have used the K&N on my truck.
It cost me $45. Did I notice any increase in fuel mileage?? no.
But, I have cleaned it 3 times over the 80,000 miles it has been
on my truck. How much are you paying for a throw away filter??
The cleaning/reoiling kit costs $10 (you can get 2 cleanings out of a kit) plus the time you have to spend cleaning it (15 minutes + drying time).
If you do not over oil it, it will not affect the sensors. 1 time I over oiled it, the check engine light came on for a day or 2 then no problems.
Also, Reduce/Reuse/Recycle. It's 1 less air filter to add to the landfill.
May not be much, but, every little bit counts!!
I run K&N filter on my truck, wife's minivan, and daughter's Grand Cherokee. Bought the one for the minivan on ebay for $24! Cleaning kit included!
I say get the K&N. It's your call. But, that's my 2 cents worth!!
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Old March 3rd, 2007, 04:57 PM   #11
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there is no such thing as a better air filter.. a filter is a filter.. ya some are washable. some are big some are small but a filter is a filter
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Old March 3rd, 2007, 04:59 PM   #12
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Quote:
Originally Posted by gmcpower98 View Post
I have used the K&N on my truck.
It cost me $45. Did I notice any increase in fuel mileage?? no.
But, I have cleaned it 3 times over the 80,000 miles it has been
on my truck. How much are you paying for a throw away filter??
The cleaning/reoiling kit costs $10 (you can get 2 cleanings out of a kit) plus the time you have to spend cleaning it (15 minutes + drying time).
If you do not over oil it, it will not affect the sensors. 1 time I over oiled it, the check engine light came on for a day or 2 then no problems.
Also, Reduce/Reuse/Recycle. It's 1 less air filter to add to the landfill.
May not be much, but, every little bit counts!!
I run K&N filter on my truck, wife's minivan, and daughter's Grand Cherokee. Bought the one for the minivan on ebay for $24! Cleaning kit included!
I say get the K&N. It's your call. But, that's my 2 cents worth!!
I thought I said the same thing.
no one ever listens to my .02
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Old March 3rd, 2007, 05:03 PM   #13
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Quote:
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I thought I said the same thing.
no one ever listens to my .02
I just take longer to say it!
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Old March 3rd, 2007, 05:54 PM   #14
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The reason a lot of oil would get in is because of overoiling. Fram air hogs need oiled too. There is such thing as a better filter, go get a purolater and a mopar put them side by side and you will see a huge quality difference.
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Old March 3rd, 2007, 06:09 PM   #15
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Some dude at MIT did a graduate study on all kinds of filters. Yes K&N flowed more air, but as said, it didn't filter as well, no matter what the oil conditions were. If I remeber right, one of the Fram's was top on the list when it came down to filteration and flow combined.
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Old March 3rd, 2007, 06:40 PM   #16
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I put on a snorkel and then a K&N filter. Yeah...I know. Shouldn't use oil based air filters with a snorkel...it said so right in the snorkel instructions. Too many people overoil their air filters tho. When you open up the K&N it is already oiled and you can barely tell if there is oil on it. I clean and wash and dry and oil and reinstall it every time I do an oil change...replacing an air filter was not something that I did every time I used to do oil changes before buying the K&N. When I oil it I am VERY sparing on the oil because I don't want it to clog up my sensors. I always blot the heck out of it and chase the pleats with paper towels. So far so good...maybe not ideal...but I am living with it for now. Every time that I have cleaned it it has been pretty dirty and the rest of the intake hasn't been too oily/dirty.
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Old March 3rd, 2007, 09:43 PM   #17
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I have an aem cold air intake. Yes it does improve gas milage and I get better performance from it. However it needs to be cleaned and re-oiled every 6000 miles an I am afraid that one of these days it will suck up some water or mud. Right now I'm definatly taking off the aem but leaving the trotle body spacer. I am just considering putting on a snorkel or headers.
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Old March 4th, 2007, 12:19 AM   #18
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Quote:
Originally Posted by gmcpower98 View Post
The cleaning/reoiling kit costs $10 (you can get 2 cleanings out of a kit)

But, that's my 2 cents worth!!
I totally agree that the K&N Kit is worth it. But you only got 2 cleanings out of it? I can't remember but I've done 4 or 5 cleanings with it and I think it still has more left in it and I follow the directions every time. I don't use the oil too sparingly but I've only over oiled it the first time when the check engine light came on. Since then I've had no problems. It is usually pretty dirty when it comes out and I've checked inside the tube for oil and dirt and I found nothing more there than when I used disposable filters. Thats my
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Old March 4th, 2007, 12:57 AM   #19
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I run a k&n drop in.

Like Marv posted, all filters let some dirt through.

For those running the aem, k&n FIPIK or other exposed filter, the Outerwears pre-filter helps on filtration, and helps bead off a bit of water.

My personal recommendation is run them on the street, and toss your stock box back in for wheeling in wet/ muddy conditions.
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Old March 4th, 2007, 12:59 AM   #20
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Fram air hog , thats what I use .......
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