I've run K&N on the last three vehicles (Saab 900, Saab 9-3, and my WRX...can't get enough of that turbo, hehe) and have seen no evidence of increased contaminants making it TO the filters, let alone THROUGH them.
This is one of those decisions where you can find ten people to tell you that it's great, and another ten to tell you that it's a bad decision.
Upside is that you'll get better throttle response, better gas mileage, and more HP. Downside is that "better" means "maybe 5% on all the above," and you need to make sure that you clean it at the proper intervals to ensure that schmutz doesn't accumulate and restrict airflow. Upside is that it'll make your engine sound just a wee bit meaner (or maybe that's a downside,) and the filter is the last one you'll have to buy. Downside is that it's fifty bucks.
You can do a simple test yourself. Put a dab of grease somewhere between the filter and the throttle in your intake tube with a stock filter, see how much dirt is on it in a week. Do the same with a K&N.
K&N, oiled foam, either one will allow your engine a less-restricted inhale.
Regardless of brand and technology preference (K&N, Amsoil, oiled gauze, oiled foam), less-restricted intake = greater performance and efficiencly than more-restricted intake.
Here's another battery of tests comparing the performance of various filters. These are done using a naturally-aspirated Mazda Miata, resulting in a more accurate analog of our Tribecas' naturally-aspirated engines.
Here's my take on the K&N filter (mind you I have one in my Accord). The "performance" and "MPG" claims are total horsesh!t. The real reason to get a washable air filter IMHO is to save money in the long run (no matter which brand you choose). I have 200k miles on my 2003 Accord, would have cost me a fortune in paper filters since I'm a heavy driver.
Since our Tribeca is the weekend car, I haven't bothered since we don't go crazy on the miles.
I recently scored a 2007 Tribeca for my son with 75K on it! Love the car but it has some strange issues.
The AC works and blows cold when set to 65 deg and when move it 66 deg the compressor stops and it blows hot air.
I checked the Freon and shows the pressure is good with on one of those auto...
Need help diagnosis on my Subaru while driving today it started to buck like I was rear ended three times then my traction light and cruise and oil and engine lights come on , I drove it slowly to get to my mechanic and after stopping at a light it didn’t want to go when I stepped on gas slowly...
My husband and I just got this 06 B9 tribeca 2 days after we got it, it started to act up. First it stalled on me on the highway and then it wouldn’t start back up we had to tow it home. Then my uncle tried to figure out was wrong we found several issues with it after we got everything fixed we...
So if someone out there wants a nearly-new Tribeca, Carter Subaru in Shoreline just put one out on the lot today:
I am guessing it's a trade-in, and I'm...
'06 Tribeca, 7 passenger, limited, OBP:
We get 15.9 miles per gallon, way under what the manufacturer claims, but its mostly city driving with the a/c on full blast too, yes it gets hot here in houston.