I just put in the K&N drop in air filter and I notice surprisingly large throttle response. It almost makes the ascent feel like a lighter vehicle.
Fitted k&n drop in last night, mk7GTI, 100% feel a difference, very subtle but it’s there. I suppose time will tell if there’s a downside. Ever so slight difference in response, coasts slightly further in gear without foot on gas. Drove it a lot today and felt the fuel economy might be a tiny bit better too, but I’ve no solid proof whatsoever, but I drive it a lot so I know it very well. All of which would make sense from a less restrictive filter.
I CLEANED and oiled the K&N filter my truck had when I bought it. It went from 14 mpg regularly, to almost 18 regularly.
I used a K&N oil free washable filter for years without any issues. I only recently took it out when I moved to a CAI. I washed it about every 10K miles. Takes about ten minutes and I would just do it in the evening so it had all night to dry.
I just cleaned mine at 45k. Wasn’t very dirty, but followed instructions to a tee. Just used the cleaner, let it sit for a couple hours, rinsed with water, low pressure. Then I let it dry completely (like 3 days - I put in the original filter I still had as a temp). Once dried, oiled it enough to let it soak in as directed. Made sure nothing dripped. Popped it in and good to go for another 2 years.
I notice a difference immediately after cleaning my K&N, especially if it's after an off road adventure where I'm sucking dust from my lead. I've also noticed minor improvements in MPG when it's fresh and clean. I dunno about idle though, maybe? If yours was 19K miles, then it was 14,000 miles overdue so that's probably why.
regular paper filters I would change around 9-10,000 miles. My K&N I clean every 3,000
Due to restrictions in SCCA Stock class rules, I only run a K&N panel... though dyno time revealed only marginal hp gains (really, its a poor ROI over the stock paper, but the K&N was part of a diagnostics test my team was doing, so it was free).
In my experience they are a waste of money with risk of fouling MAF sensor. I’ve tried them in my diesels and gassers. I never once wasted my time cleaning and re-oiling a K&N. I just threw it out and went back to OEM.
I had a K&N air filter in a NA engine VW. Some particles do get through as I could feel grit on the inside of the intake pipe past the airbox. I washed and oiled the filter per instructions.
Write your review
Help others - share your experience with this part.
Voted AGAINST engine oil RAVENOL on the rating page
The brake pads NIPPARTS got the first review!
The brake discs Hella got the first review!
The brake discs OEM Suzuki got the first review!
For tires OEM Toyota already 25 reviews.
For tires IRONMAN already 25 reviews.
For starter motor OEM Volkswagen already 25 reviews.
In the rating best ignition coil already 13 brands participate!
In the rating best fuel pump already 5 brands participate!
In the rating best turbocharger already 4 brands participate!
In the auto rating headlights for Volkswagen Golf already 5 brands participate!
In the auto rating brake pads for Mazda 5 already 10 brands participate!
In the auto rating brake pads for BMW M2 already 5 brands participate!
Voted AGAINST engine oil RED LINE on the rating page
Voted AGAINST engine oil PENNZOIL on the rating page
