Which AIR Filter Do You Use?

I use stock for the time being, have tried the K&N oil but didn't notice any gains in anything whatsoever. It runs the same either way.

 

Stock anything else is a waste of $$

 

same here. I have a K&N Cold Air Intake and plan on putting it back to stock.

 

I have a K&N Air Filter in the stock configuration. I was so impressed with the stock plumbing that I thought the stock style K&N would work fine and it has. Never any issues.

However, I am going to buy another so I can have a spare. That way I do not have to wait for it to dry after cleaning and get back on the road.

 

K&N cold air plus I replaced the plugs with C3 plugs big difference. Replaced ft rotors with EBC & EBC yellow pads.

 

Cheaper to buy stock paper filter and keep it in a plastic bag when not using it.

 

Stock, have used pro dry s an pro dry r and k and n. All of them let dirt threw except stock paper filter.

 

Just curious, for those who say they've seen dirt with certain filters where are you seeing the dirt? I've been using the trd filter for at least 6 months and haven't seen any dirt anywhere in the intake up to and including the throttle body. The only dirt I can see is the dirt on the filter itself.

 

Mine was in the intake tube. Very fine dust like stuff . My opinion is the high flow filters don't filter as well. Probably not enough dirt to hurt anything though. Very minor amount.

 

Use oil analysis, and I've seen engines with 75k on them with scoring on the cylinder walls.

I ran a K&N drop-in in my '94 and it was an oil burner by 100k.

On used oil analysis, I've had reports with Blackstone commenting specifically on the silicon levels, indicating that they recommend I check the intake system for bad seals, leaks, and proper seating of the filter.

IOTW: They thought that unfiltered air was getting past the filter.

 

stock. but when it's time to change it ill buy a pro dry for it's lifetime use. this is my "ten year minimum" truck

 

I run the stock Toyota brand filter

 

Just bought a K&N pop-in. I'll see how I like it.

 

Stock paper ftw. Chuck it in the trash when its clogged every few months

 

I've serviced thousands of vehicles from motorcycles to big-rigs and construction equipment that run on and off road. I will NEVER trust a K&N or any of those cotton gauze filters oiled or not. Foam, hit & miss, mostly miss. Standard paper, even a shitty one, do best. Every time I see a dirty intake hose or MAF sensor it's been with some kind of aftermarket "performance" filter. The other problem is that many performance filters lack any amount of useful structure (that perforated metal mesh backing). I've seen stock filters plugged so bad that the thing was deforming from the vacuum, but it held together and stayed sealed. Many performance filters lack this and if it plugged up could deform enough to break the seal. Of course they rarely do as they won't hold enough fine particles to actually clog. I've also done several tests before/after and have found none that give performance gains. I've done air box deletes on a few of my cars, all with paper, and some will gain a little bit. It has to be a restrictive system otherwise you'll gain nothing but the fallacy of being faster; I have time slips to prove it. Some say that this fine dust is no big deal, it just makes the oil dirty a little faster and as long as you change it nothing matters. The air (dirt) has to get past the pistons & rings and across the cylinders to reach the oil.....thinking yet? The oil filter is only really effective down to about 20 microns assuming it's not full and bypassing altogether. Yay, early rebuild opportunity! The exception is a bypass filter which can be good to 1 micron.....generally made of what? Paper.

The amsoil does filter well, but it's expensive, a time consuming bitch to properly service, and likely doesn't outflow a paper. By the time it's starting to pay off the seal is shot anyway (my one only experience with a LONG term amsoil filter user). It's the only reusable I'd condone, but it's only a benefit if you're a tree hugger afraid to trash a dirty piece of paper once every 30-50 thousand miles. Of course a proper tree hugger will have to consider where the water/degreaser/oil/dirt runoff is going to be eternally stored so it never reaches the ground or ocean while also considering the manufacturing processes of a mostly 'plastic' product and it's service oil & cleaner.

In the end, it's your motor and you'll run what you like. I have no vested interest in keeping stuff working as I make a living off broken vehicles. None of my friends, family, or customers run these things if I can avoid it.

Now IF you're just looking to bore out your cylinders slowly and cheaply, then yes, a high flow filter is a cost effective way to go about it.

PLEASE-can anyone name a vehicle manufacturer that installs one of these filters instead of paper? Million mile diesel trucks-American performance warriors like Mustang, Camaro, Corvette-Italian supercars-sport bikes-construction equipment....any that use something other than paper? Even a friggin vacuum cleaner uses paper as it's filtering media.

 

I run an Injen microfiber dry filter.



Amsoil also sells them.

 

Never seen or tried that one, but hear good things about it.

 

It really comes down to what environment your truck is in. For the PNW you could easily use a K&N filter and be good for the life of your truck, but the new stock filters work great and flow just as good. I have a k&n I ran for a couple hundred miles but I put stock back in and I couldn't tell the difference. So in all honesty I will be running either stock or the K&N for up in the mountains

 

I don't think any part of our country has dust free zones.

 

I ran a comparison between the K&N and stock filter. The first time I ran them 1200 miles each. The second time it was 2000 miles. I drove the same trip to work and back and tried to drive the same. I used an UltraGuage. The K&n gave 1mpg better one time and .8mpg better the second.

I had an 86 4runner that good 485,000 miles on the engine without a single repair needed while using a K&n since new. I did a lot off of roading in the dust, so I figure it must have worked ok. I did go through 3 transmissions though.