I choose K&N, because it's reusable, and offers the performance I look for in an air filter.
Here is a 2.0 owner with a 1999 GL and 56K on the clock. I decided to use K&N drop in filter as a replacement on the CAI. So here is what I noticed after I put K&N on my puny 2.0: 1. 1.7 - 2.3 EXTRA mpg 2. Better throtle reponse, especially above 3K rpms 3. No problems concerning the MAF and oil flying off the filter I think my $45.87 was well spent!
Your experience is your experience- that's fine. I have seen gains. My fuel economy has gone up about two miles per gallon on average.
I just turned over 9K on my car. installed a K&N on the day I got the car with 34 miles on the clock. After reading your post the other day on this subject, I decided to check my MAF and intake for signs of mineral oil. There were no signs of it. Not on this car, or the Jetta 1.8T I had before this one. I ran that car with a K&N panel filter for for approx. 36,000 miles until I sold it for the GTI. I have owned (6) cars in my life. (4) of them had K&N filters in them. I have never had a problem with any of them as a result of these filters.
Agreed ^^ I did mine a wek ago and the sound is great! The DV is definately audible now and the turbo spools a little quicker and whines louder! You'll get a little better mileage like alreadt stated and I'm sure you'll gain a few HP, but its not very noticeable.
The K&N drop in is nice. I don't want to do a CAI, so it's a good compromise. I don't know if there is much perfomance gains, the 1.8T feels a little stronger with the drop in filter. The sound is great though. I put my new filter in last weekend and took a friend out and he was loving the sound of the turbo and DV coming through the stock air box. Nothing too crazy like a CAI or BOV, but it definetly makes alittle more noise.
K&N Air Filter
I have a K&N in my BMW and it has helped with fuel consumption - however - it was a pro install and has a cold air duct fitted to the front grille. The car was then also dyno tuned to optimise the better airflow. However - I take the benefit in fewer filter changes and better fuel consumption.
Plugs, Coils, Maf, Front 02 sensor have been changed, I am not running motor mounts of any kind, my car feels so Unsmooth compared to other 1.8t´s I have driven this only seems to happen under low load... you can feel the cabin vibrate... not a lot but defenetely the steering wheel, pedals, shift knob. and the car seems to stop and let go, stop and let go (jerky) whenever I let go off the gas pedal in gear... it feels so unsmooth!!!
Many manufaturers, including VW, Ford, BMW etc. have determined that the oil used to assist the paper gauze as a filtering medium is contaminating the MAF sensors. When contaminated, replacement is required as MAF sensors cannot be cleaned. Apparently, Ford has already issued a TSB on this, and I understand VW/AUdi is just about to. Anyway, most Dealer Service depts are now very much aware of this, so it's unlikely they'll cover a contaminated MAF under warranty.
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