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Thread: What's a good Reusable air filter that's not oil based? Reply to Thread
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  Topic Review (Newest First)
10-10-2019 10:56 AM
Ross To the OP:

My advice to the OP is keep the stock airbox regardless of the filter you use.

AS far as added MPG, my son just bought a XJ, it had the K&N CAI. We soaked it and cleaned it until the water was clean. We reoiled it and ran it. Since this post has come about we replaced the CAI with a stock box and a not as clean K&N air filter (which will be replaced by a paper disposal filter as soon as I get to town which will probably be tomorrow).

My kids XJ has the digital read out which tells you MPG. Since changing to the stock air box he is averaging 18 mpg and was previously averaging 16 mpg. He is driving rural HWYs usually running 45-55 mph. He has 33s and 4:56s gears with the 4.0 and an auto. Your mileage my very. The speedo gear is not correct so the actual MPG may not be accurate but the difference between the 2 intakes can still be seen.
10-10-2019 10:35 AM
Ross
Quote:
Originally Posted by cranbiz View Post
Didn't say anything about being more restrictive, just that it's really the only way to actually get cold air into the engine compartment. A standard JK CAI just replaces the stock airbox with a filter and a straight tube to the intake. It draws it's air from exactly the same place the stock airbox does.
You brought up snorkel so I added my 2 cents.

What I am saying is the added restriction gained by running an extra couple feet of tubing could quickly negate any benefit you would gain buy gathering cooler air from a snorkel. Snorkels have a purpose but efficiently bringing air to an engine is not one of them.

As far as cool air? I am not sure if there is room in the cowl of a JK like there is in a TJ. In a TJ you can run a shorter intake (than a snorkel) into the cowl or even through he cowl like an H1. But even then you may increase restriction?

Another snorkel issue is the vulnerability of that unprotected tube running up the side of your Jeep.

The K&N does have its heat shield and I believe draws the air from the same area has the stock airbox. I agree it isn't offering colder area and possible even warmer Air. The smart guys at Fiat/Chrysler/Jeep probably figured the temp of the air was just fine with the stock air box so I doubt they are an issue with the air temp from K&N "cold air intake". The CAI setups (big exposed cones either paper or other material) do offer far less protection that the stock box, that is their biggest problem.

The OP does mention either using a CAI or the stock housing, not a snorkel.
10-10-2019 08:15 AM
cranbiz
Quote:
Originally Posted by Ross View Post
A snorkel will be more restrictive, that may or may not be an issue. Another thing to think about is the vulnerability of a plastic tube running up the outside of your Jeep.
Didn't say anything about being more restrictive, just that it's really the only way to actually get cold air into the engine compartment. A standard JK CAI just replaces the stock airbox with a filter and a straight tube to the intake. It draws it's air from exactly the same place the stock airbox does.
10-09-2019 10:29 AM
Ross
Quote:
Originally Posted by cranbiz View Post
Do what you suggest with a JK. The CAI's draw air in from the engine compartment, just like the stock filter. There is no way the intake air temp will be ambient. If you want a CAI in a JK, you need to run a snorkel. That is the only thing on the market that actually draws air in from the outside.
A snorkel will be more restrictive, that may or may not be an issue. Another thing to think about is the vulnerability of a plastic tube running up the outside of your Jeep.
10-09-2019 08:51 AM
cranbiz
Quote:
Originally Posted by JohnR1 View Post
I like how people ask a question on this site and everyone offers there opions and wealth of knowledge, or lack of.


The filter you will want to will be aFe dry type S. I recommend that you get a spare filer and plugged filter indicator, k&n make one, part#85-2445 as you really cant look at them at tell that they are now flowing as much as they can. use a outerwears wrap to keep big stuff out of them and it will also not let water get past it.


on my 08 unlimited which has a motech 5.3, I started to have problems with my MAF sensor and it was getting coated with the oil from the specte filters that Robbie was using, so I carried a couple spare MAF sensors and a can of contact cleaner with me. to those who say that a cold air intake doesn't work, purchase a aeroforce defender meter and install is and watch you air intake temp with it. your underhood temp is running around 180 degrees or more. with a proper CAI you should be running ambient.
Do what you suggest with a JK. The CAI's draw air in from the engine compartment, just like the stock filter. There is no way the intake air temp will be ambient. If you want a CAI in a JK, you need to run a snorkel. That is the only thing on the market that actually draws air in from the outside.
10-07-2019 08:59 AM
tahoeJeep To simply answer the OP's question, Amsoil carries high performance filters that are dry (use no oil). Ran one on my 5.7 Hemi TJ and it worked great!
09-28-2019 09:33 AM
Ross I can't people still want cold air intakes on an off road vehicle.
09-28-2019 08:54 AM
JohnR1 I like how people ask a question on this site and everyone offers there opions and wealth of knowledge, or lack of.


The filter you will want to will be aFe dry type S. I recommend that you get a spare filer and plugged filter indicator, k&n make one, part#85-2445 as you really cant look at them at tell that they are now flowing as much as they can. use a outerwears wrap to keep big stuff out of them and it will also not let water get past it.


on my 08 unlimited which has a motech 5.3, I started to have problems with my MAF sensor and it was getting coated with the oil from the specte filters that Robbie was using, so I carried a couple spare MAF sensors and a can of contact cleaner with me. to those who say that a cold air intake doesn't work, purchase a aeroforce defender meter and install is and watch you air intake temp with it. your underhood temp is running around 180 degrees or more. with a proper CAI you should be running ambient.
09-27-2019 02:36 PM
L2R I tend to believe the idea that oil filter is messing with my (new to me) rubicon


Been looking for a paper filter that I could just put on and throw away the K&N oil filter.
Oddly, found this thread just now.


engine light has been going on and off.
Finally caught the code while the engine was hot. P0219 (barometric pressure sensor) or map sensor.
Haven't found whether there is more than one MAP sensor or ??? but it sounds just like what is being discussed here.
09-27-2019 11:13 AM
Douglas Wampler I'm piggy backing on this post. I have a 75 CJ-5 304. Is the K&N worth the money? does it help performance? Looking for informed opinions, Please.
06-18-2019 09:18 PM
ronjenx
Quote:
Originally Posted by Kruzin View Post
The oil messes with and clogs up the MAF sensor.
True, but only on vehicles that have a MAF sensor.
06-18-2019 02:28 PM
vicker I'm not really expecting a big performance boost out of the cold air intake. honestly I like the sound from The increased airflow, I like the way it looks and I like the idea of a rechargeable medium. although I rather not use the oil and I know they make dry reusable air filters.
06-18-2019 12:45 PM
RubiconFreedom For what it's worth, I've had this same K&N filter for 10 years installed on 3 different JK wranglers. The purchase price back then was $45.00 via the K&N site. Never had the desire to want a cold air intake, just a drop in lifetime filter. Using or reusing the same filter has saved us a few hundred dollars over those 10 years. The clue is not to over clean or over spray the filter with the recharging fluid and allow it to cure for at least 24 hours.. I tend to allow 1 week of curing and wipe off any excess spray from around the filter. It's never cause any issues with any of our vehicles. Furthermore, that's one less paper filter in our landfills unless someone has a tip on recycling these paper filters.
06-18-2019 12:22 PM
222Doc total waist of money. especially here, paper and replace as needed. mine its every 3k. MPG with that year auto will be best with stock size tire #1. That year auto needs all of its 3.73 gears to do it well on stock tires. so if say you put on 33s or worse yet 35s and now MPG is like a 70s pickup. The only fix is gears, you cant tune your way out it or add headers or anything else. if your stock your as good as it gets in a jeep. i mean that should get what at least 17mpg? heck even the latest ones dont do much better. our 12jk did 19 at best on stock 32. but it is a Rubi and they did get at least 1/2mpg less then the other that year if they came with 4.1 and auto. still not bad for a heep.

Most any gain with air intake will be the far end of the RPM range As well NONE of these systems even pull cold air, meaning air out side of the engine bay. So the claim of COLD air? yea not true. the 3.8 dont run all that well at its end RPM range. they just dont breath all that well at say 5+rpms. even if it did the system has room anyway. power falls after 5k do to being push rod and no VVT. no cold air will change that. might as well add magnets to fuel lines and other gimmicks that they sell.
06-18-2019 12:15 PM
cranbiz Like another posted said, the stock setup is remarkably efficient. Putting on a CAI is a waste of time and money and will possibly cause damage to your engine.

Any filter that provides more airflow to the motor, by definition, has to filter particulates less.

You are not going to get any additional MPG with this mod. Match your tire size to the gear ration and drive like Miss Daisy and you will get decent mileage.
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