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07-06-2009, 08:29 PM | #1 |
I've made a post!
Drives: 2007 Yaris Join Date: Jul 2009
Location: 84015
Posts: 1
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K&N Filters
Hi everyone, I just joined the forum and have a question about K&N filters. Are they a good idea for the Yaris? I have a 2007 three door, I've heard the oil used on the filter can cause problems for the sensors. I'm looking for real world experince on this subject. Thanks in advance.
Ken |
07-06-2009, 08:41 PM | #2 |
Drives: 2008 Yaris 5 speed HB Join Date: Oct 2008
Location: NH
Posts: 171
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I put one in mine when the car was new and one in my wife's Scion XB (which has essentially the same motor) at about 20K . I expect there is more oil floating around from the engine itself than from the filter. Both vehicles have 30K mi with no problems.
I can only verify about 0.5 Mpg improvement, but the better deal is less waste, and my wife thinks her car has a little more pep. Another advantage is the warning sticker that says `Permanent Filter - Do NOT dispose'. Useful for the 1 or 2 times that I don't change my own oil in the winter, and the shop tries to sell me an air filter, transmission fluid, and just about every other replaceable the car has. Amazon.com or AutoAnything.com have reasonable prices and the cleaning kit of oil. |
07-06-2009, 08:46 PM | #3 |
Drives: 2008 HB, A/T, Power W/L/M Join Date: Oct 2008
Location: LI, New Yawk
Posts: 2,063
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I have 15,000mi on mine in my '08 and no problems.
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Never take eyes off opponent - Bruce Lee |
07-06-2009, 11:44 PM | #4 |
Drives: 08 Sedan Join Date: Oct 2008
Location: Tyler, TX
Posts: 899
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I have 35,000 on my 07 and 24,000 on my 08 and I have had no problems with their K&N filters or the cars.
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07-07-2009, 06:07 AM | #5 |
Beware of hybrid hype!
Drives: 2009 Toyota Yaris 5 door Join Date: Jun 2009
Location: Delaware, USA
Posts: 25
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For the folks that have been running the K&N air filters for several thousand miles, have you seen an improvement in fuel economy, and if so, how much of an improvement?
Thanks! |
07-07-2009, 08:06 AM | #6 |
daily driver
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i use one in my stock airbox all winter...i get about +1MPG
i recommend k&n drop-ins vs stock paper in any car, its a great money saving item (mainly that you don't have to pay to replace the paper one)
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07-07-2009, 10:55 AM | #7 |
Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009
Location: Middletown, NY
Posts: 1,502
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Although I haven't been running a K&N in my Yaris (as I just got it) I have had one in my Celica for the last 6+ years with absolutly no problems.
As I see it, engines have to "breath" freely and anything that helps like a K&N has be a +. |
07-07-2009, 01:02 PM | #8 |
Drives: yaris sedan Join Date: Oct 2008
Location: venezuela
Posts: 78
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you can use the filter without oil too .. i have two years cleaning with wather and soap and no problems
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07-07-2009, 01:30 PM | #9 | |
Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009
Location: Middletown, NY
Posts: 1,502
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Quote:
Oiling the filter (applying the correct amount) is not dificult at all. The oil "problem" is simply a myth perpetuated by competing filter technology vendors. As I said in another thread, Toyota offers a K&N type filter themselves so, they obviously have no problems with it. A TRD filter is made exactly like the K&N and may even be made by K&N. |
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07-07-2009, 03:11 PM | #10 | |
Drives: 2013 Chevy Spark 1LT 5-speed Join Date: Oct 2008
Location: Oklahoma
Posts: 1,185
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Quote:
My view on oiled filters, for a stock Yaris like mine, is it'll save money when you're able to re-use it, but it's sure not worth it if you're thinking it'll give you big savings at the pump and will give you power that can be felt. ...and I'm sure the dealers have no problems charging customers for a computer analysis, cleaning, and sometimes even replacing MAF meters; pretty sure they stock and sell them all the time.
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1997 Lincoln Town Car - SOLD 2008 Scion xD (w/ automatic) - SOLD 2008 Yaris HB - SOLD Last edited by 1stToyota; 07-20-2009 at 08:59 AM. |
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07-07-2009, 05:58 PM | #11 | |
Drives: bone f*ing stock Join Date: Dec 2008
Location: CA east bay
Posts: 234
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Quote:
your mistake is believing the customer, customers are lying snakes when it comes to getting their cars fixed they will always claim, "i did nothing out of the ordinary...." and finish with, "then all of a sudden...." I have used oil-gauze filters on so many different cars and bikes that i have owned and have never had a problem. I have only seen a problem on cars with this kind of filter when the person fucked up. I have also personally experienced the "i don't know it is not driving normally" we popped the air box and pulled the filter and there was a puddle of oil sitting in the bottom of the air box. |
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07-07-2009, 06:40 PM | #12 | |
Drives: 2013 Chevy Spark 1LT 5-speed Join Date: Oct 2008
Location: Oklahoma
Posts: 1,185
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Quote:
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07-08-2009, 01:33 PM | #13 | |
Drives: 08 Sedan Join Date: Oct 2008
Location: Tyler, TX
Posts: 899
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Quote:
Fuel Economy Fuel economy testing and mileage claims are a tricky business. Just ask the EPA, whose website states, “EPA’s fuel economy estimates are designed to allow consumers to comparison shop. Your fuel economy will almost certainly vary from EPA’s fuel economy rating. This is based on a number of factors, such as weather, road conditions, your driving and maintenance habits, and your use of air conditioning.” A lot of exaggerated claims are made in the marketplace by products claiming to improve gas mileage. K&N makes no general fuel economy claims, however we encourage you to try our air filter for yourself. Keeping air filter restriction as low as possible can be an important tool, among others, for maintaining high mileage. Also you said that K&N filters are suppose to give you "power that can be felt," but K&N states, "Our automotive OE (original equipment) replacement air filters generally add 1-4 horsepower." So I wouldn't call 1 HP something you can "feel." By the way, how old was the Avalon and how many miles did it have? |
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07-09-2009, 08:40 AM | #14 | |
Drives: 2013 Chevy Spark 1LT 5-speed Join Date: Oct 2008
Location: Oklahoma
Posts: 1,185
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Quote:
Don't remember exactly on the Avalon, sure wasn't a beater; fairly late model (I do rembember that it was OBDII) and appeared to be very well taken care of. Main thing about the Avalon was that the MIL was on, couldn't get above about 55% calculated engine load @ WOT on the datastream, and had fresh oil buildup on the sensor, not the typical gray/tan dry ash coating that I come across.
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1997 Lincoln Town Car - SOLD 2008 Scion xD (w/ automatic) - SOLD 2008 Yaris HB - SOLD Last edited by 1stToyota; 07-09-2009 at 11:07 AM. |
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07-07-2009, 09:27 PM | #15 |
Banned
Drives: 2008 Yaris Join Date: Oct 2008
Location: Pennsylvania
Posts: 1,034
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I had one for a brief while. I read some studies which showed that the filtration rate of a K&N is not as effective as some other filters. I went out and bought one of those instead. I change the filter about every other oil change or when I can no longer see daylight through it, which ever comes first.
Gene |
07-09-2009, 09:12 PM | #16 |
Banned
Drives: 2008 Yaris Join Date: Oct 2008
Location: Pennsylvania
Posts: 1,034
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Friend who has a Dynamometer claims that K&Ns on average do nothing for horsepower, sometimes even slightly reduces it. One of his friends put it best - "If GM could gain some HP from K&N they'd at least offer it as a factory option, if not a Dealer option".
Gene |
07-09-2009, 09:21 PM | #17 |
Drives: 2007 Yaris Hatchback Join Date: Jul 2007
Location: Beaufort, South Carolina
Posts: 388
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the drop-in filters claim no hp gain, however they do have an airbox replacement filter, which may gain a few hp b/c they are changing the shape and length of the air inlet+piping (the box is gone i believe), on k&n's website they have a 'dyno chart' to prove it-- but I strongly doubt any claims to be translatable to in real world usage
Last edited by scape; 07-09-2009 at 09:41 PM. |
07-13-2009, 11:45 AM | #18 |
HardlyDangerous
Drives: 09 Yaris LE, H/B, auto Join Date: Jul 2006
Location: Ridgeway Ontario
Posts: 573
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have you ever wondered why you never see a K&N filter on any stock machine?
if they were so great why don't they use them Simple cotton filter are the worst filter type for filtering fine dust that will cause premature engine wear. Even K&N recommends a foam prefilter for dusty conditions do think you car sees much dusty conditions? don't wash under the hood for a couple months and look how much dust built up collects on the engine cover, not X that by XXXXXXXXXX the amount of air you engine sucks in everyday and think about how much of that dust is going into your engine. As a motorcycle mechanic I have seen hundreds of engines destroyed by using K&N filters. #1 they do throw off the jetting sometime lean other times they reduce the intake velocity and cause the engine to run too rich or just poorly overall. Even FI bike need to have the fuel systems re-mapped for a K&N. for you K&N owners take a clean white rag and go wipe out the intake pipe to the manifold and then tell us its clean in there. I have shown dozens of owners this for YEARS and most people withh agree they SUCK. if the MFG could gain and extra MPG from a different air filter don't you think they would have installed it?
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