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k&n filter?

 
  #61  
Old 02-07-2017, 06:57 PM
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I just bought an 05 F250 with the 5.4 and it came with a cold air intake. after reading this, I want to rip it out and put the OEM system back in.
 
  #62  
Old 02-07-2017, 07:02 PM
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I just changed my oil yesterday. Im going to send in my oil to get checked by black stone. Might try a dry filter too. I don't really wanna put my stock intake back on but I will if it means protecting my motor. The next time I have to change my oil I'll send it in again to get it analyzed to see the difference. I'll know if my investment was worth it or not.
 
  #63  
Old 02-09-2017, 06:25 PM
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I just bought a 93 Vette,I saw a K&N sticker on the fan shroud.Due to work & crappy weather I havent had a chance to check it out,if it does Im trashen it.
My old 85 Vette &90 had a MAF sensor so I wouldn't even think of a oil impregnated air filter,Just my 1/2 cent input.

Component disassembly to reach the mass airflow sensor (MAF).
Mass airflow (MAF) sensor problems on these engines typically cause lean fuel conditions and possibly hard starting or even no starts. If the sensor element becomes contaminated with dirt, fuel varnish or oil (from oiled aftermarket low restriction air filters), the sensor won’t read accurately. MAF sensors can often be cleaned with aerosol electronics cleaner.
 
  #64  
Old 08-19-2017, 10:07 PM
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Walking through the local Walmart's Auto section. They recently changed the department around and I was making sure they still had the MC filters. This is what they replaced on the shelf that use to have the MC Oil Filters. They have the whole top shelf loaded with K&N Filters. Those for from what I can tell are Ford applications had the Ford Racing logo.





Either way in work, one of my co workers swear by K&N filters. He said it has been the only thing that gets the best mileage and he has seen any where between 2-5 MPG on any vehicle he used the filters on. I said they might work but I would not trust them as they could cause problems for the engine down the road. The same co worker was even trying to get management to get on board with the filter saying it would save the company money in fuel costs.
 
  #65  
Old 08-28-2017, 04:52 PM
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If you throw all the science aside, the 3rd party ISO certified testing facility docs in the trash, I can tell you about my own personal experience in regards to K&N's warranty....of which they do not honor....this dates back to 1997 and my own personal OASIS documented experience with K&N.... I installed an oem replacement unit on our new 1997 Cougar Sport (1 week old, factory special order), the filter was purchased directly from K&N. For those who may not know, the Cougar Sport is essentially a mustang GT with 4-wheel independent suspension except it is built on the MN12 chassis (LSC Coupe) which gives extra stiffness. Within 90 days, multiple intake location specific sensors (paraphrasing here) went bad...throwing codes. After Ford verified and replaced under warranty twice the sensors during this period, when they analyized the parts, they determined oil residue from the K&N caused the component failure. Ford recommended the filter (K&N) be removed...and there has been no other failures to date (2017) on these components (20 years later).

I called K&N and advised them (very nicely) of the issue....back then the K&N filter was around $60 iirr......they stated if you are not happy with the filter and have the original box we will take it back and refund the $. Even with full documentation, K&N never (including multiple visits with their staff at their offices and at conference meetings) would ever take any action and just kept insisting there must be another cause for this with the car...there wasn't. K&N has made repeated references throughout the years on multiple chat sites that this situation has never occurred, yet the oasis documentation is very well established.
 
  #66  
Old 08-28-2017, 06:36 PM
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Use at your own risk. I've had my K&N on my 6.7 diesel for over a year. I installed it wanting a little bit more HP while towing. I got what I purchased it for. There are people saying the filters are junk and allow more dirt into the motor. I have no evidence of this in regards to my truck. I only have 1 oil change on my filter. I sent a sample to blackstone lab. Everything came back normal. I did have a few CEL. Always the same code. I can't remember the number, but it was a difference in air pressure psi between the map and the mas. Its amazing that any air gets into the shock air box. When I installed the K&N I took off massive amounts of plastic. With the K&N now my truck can breath. The CEL was traced to the air filter... it was over lubed. I cleaned the sensors and haven't had any issues. K&N wasn't my top pick but I didn't have a lot of options. I don't live in a free state... I have to get my 2011 diesel truck smoged every year to pay for my registration. In this state you need a CARB compliant air intake. It was on sale, out the door just over 200.
If you gonna just it i suggest using a dry filter and getting your oil tested.
 
  #67  
Old 08-31-2017, 07:36 AM
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I have been a K&N user for over 30 years... Yes oil-film can cover sensors...

I now run the AEM oil-less washable air filter... very well made.
over 1 year now.
Look into it.
 
  #68  
Old 08-31-2017, 10:47 AM
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I just find it interesting that people had issues with the K&N filter. However, I don't know how to take it this as Ford is giving what appears to be applied consent to using the filter with Ford products. Ford like any manufacturer is trying to lower their after sales cost (warranty) Does this mean if the dealer tech performing a warranty service to a vehicle finds this filter in the air box he or she is OKing it as not being the problem? Are they still going to deny the claim since there was an "aftermarket" component that may or may not have caused the original trouble? I see a slippery slope here as if Ford could deny for aftermarket even though the clearly place their Racing logo on the product.
 
  #69  
Old 08-31-2017, 10:24 PM
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I have used K&N's for many years now. The main reason is economics. There are some over oiling issues but once you figure out how to clean and re-oil them the problems go away.

I keep a paper filter to swap in and will actually wait a couple of days after I clean and re-oil. Letting it soak in and dry is the key.
 
  #70  
Old 09-02-2017, 12:38 PM
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I am not an authority on this, but will add my two cents. Back in the old, old days motor vehicles came from the factory with oil bath filters. They were standard equipment up until about 1959. Despite the convenience of the paper air filter cartridge, the oil bath system is proven to be far more efficient when it comes to particulate removal. Its demise was due the fact that draining, cleaning and refilling were no where near as convenient as swapping out a paper filter cartridge.
 
  #71  
Old 01-24-2019, 09:40 PM
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Common sense will tell you that if the filter is less restrictive, you get better airflow. More air passing the filter element, allows for more contaminants. With an oiled filter, you are trusting the oil to trap particulate contaminants, as air passes.

Myself, and many others, have used K&N oiled filters for decades. Mostly with success. Occasionally, somebody adds too much oil to the filter.

Whether you get performance or mileage gains is debatable. Obviously, when you change a part from OEM specs, not everything stays the same. But is it enough of a difference? Sometimes, that depends on the car. Unbelievable, but true, that there are instances of mileage improvement. As for performance, it's nothing that you will actually feel, or win a race with.

With the numbers on an engine dyno, there may be a minute change. Run an engine, just the engine, on an engine dyno, and measure the power output. The change will be so small, that it will not translate to that engine mounted in a car, and actually adding more power to the wheels on the road. But, it's there. And if you are bolting on accessories, an intake or oiled filter is something that goes right along with all of the other bolt on accessories. Don't forget the stickers that came in the box. Stickers not only add HP & torque, they intimidate the competition, and draw the attention of the police.
 
 
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