I've been using K&N filters in my cars for more than 25 years, never had any problems ever and their million mile warranty is awesome. Just keep them clean and easily re-oil em' up and they look like new...

 

I agree , theres nothing wrong with K&N filters , i have used them for years , the only time you might have a problem is if you have a highperformance motor with a mass air meter , if the filter gets over oiled , some of the oil can get sucked into the air intake & foul the air meter if its over oiled , if its oiled the right way you won't have this problem , im sure K&N knows this problem & think soon they will make an oil less filter for these applications soon ...Lew

 

Just go look at the vid! it was made just a couple of years ago and is still required for all Ford MSE's

 

If you look at the flow data, WIX HP filters flow 98+% of K&N and have a much smoother flow post filter plus excellent filtering, for a fraction of the price! The OE’s have an excellent air intake system. What many view as an issue (is the plastic intake tube with it’s noise canceling design) actually increases air pressure. It is the same hydraulic concept used by fire fighters creating water supply where psi is low. By having the air cross the path at a 90 degree angle, the pressure is increased proportionally. Fire fighters use what is called a “4-way valve” or “Blake Valve” at the hydrant where the water is cycled through the fire engine (pump) and sent back into the valve crossing the water flow at a 90 degree angle. In this case it also acts as a sound canceling device! At low speeds, this can reduce the flow a tad (which is what most “feel”), but in terms of peak hp/tq, a good high flow filter is all that is needed. You can use a WIX OEM HP replacement filter in the OEM plastic manifold box and either remove the plastic tube and replace it with a piece of pipe/hose, etc or remove the tube completely and replace the tube by building an air ram type intake into the air box manifold (where the pipe use to attach)- make sure ti terminates above the fan shroud to avoid water intake or fan induced pulsations.

 

I used to use K&N, people say they only stop squirrels. I think they are okay as long as you keep them oiled. I have a S&B on my SuperDuty now and really like it, great engineered product overall!

 

I think the people who usually have problems think the million mile warranty means, "no maintenance till 1,000,000 miles, yeah, just lazy people not doing routine maintenance, I haven't had a problem as well in 3 different vehicles.

 

On mine, the K&N was installed right from the factory box, damaged 3 sensors in 90 days (each within 30 days) on a brand new Ford. On the 3rd round, Ford engineers issued the advisory regarding the oil contamination, replaced the unit with a printed directive not to use any oil impregnated filter- I pulled the K&N out in formt of the service advisor and have not had another single failure in 14 years. this is all document on OASIS btw....K&N's response in 1997, "that couldn't happen".

Previously I ran K&N's on my dirt bikes and even my 1990 F150, but the components are different- if you are lucky and haven't had a problem great! But the factory is even training techs (vids) on this and they are posted on flatratetech.com- specific to warranty claims and modifications to vehicles including oiled filters.

 

It damaged your MAF correct? Did they blame too much oiling or all oiled air filter elements?

 

Correct- it damaged the MAF

They stated "oil contamination on element- remove oil impregnated filter and replace with OEM unit"

FYI- at that time, ford also had a policy that if the unit is damaged as a result of contamination, do not attempt to clean, replace the unit. I know many have had success cleaning the units with alcohol.

 

I had one on a 97 expy that went 250,000 miles with one and never had a problem.. Matter of fact, when I sold that truck, I pulled it and put it in my 2003 F250...

 

Yes...and previously i ran one on my 1990 F150 the day it was delivered until 2006 when I sold it. But, it had a different system...the fact is that Ford, GM & Chrysler train it's techs regarding the damage that these "oiled" units may and have caused. Given the validaed info, the 3rd party testing that verifies that both in terms of filtering capacity, flow and post-filter flow patterns, cotton filters provide greater performance than K&N specific filters unless they have been specifically designed for a particular system...a one off so to speak (like the new Shelby's).