Mileage decrease with K & N filter
Elder User
Joined: Sep 2002
Posts: 772
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From: White Sands, NM
Well, I never heard of anybody taking the filter out before going in for service. Why would you do that?
Also, I suspect that those few who claim their MAF needed cleaned because of the filter, probably used too much oil when they cleaned the filter.
Also, I suspect that those few who claim their MAF needed cleaned because of the filter, probably used too much oil when they cleaned the filter.
Junior User
Joined: Sep 2003
Posts: 52
Likes: 0
From: chicago
i guess it is all a personal opinion. the main question is why he is losing mileage. there are many opinions on that as well. i know that i wont be taking out the filter when i go in for service. is there anything that says i have to use motorcraft parts? i am not sure, i guess i should read some of the paperwork.
Senior User
Joined: Sep 2003
Posts: 150
Likes: 0
From: NC
Originally posted by AegisSailor
Well, I never heard of anybody taking the filter out before going in for service. Why would you do that?
Also, I suspect that those few who claim their MAF needed cleaned because of the filter, probably used too much oil when they cleaned the filter.
Well, I never heard of anybody taking the filter out before going in for service. Why would you do that?
Also, I suspect that those few who claim their MAF needed cleaned because of the filter, probably used too much oil when they cleaned the filter.
And I do know from experience that over oiling will hose the MAF sensor.
As I stated earlier, all my engines have K&N filters (except my lawnmower), and I have yet to see a problem. I could just be lucky, but I think I'll keep going with the K&Ns. The only vehicle I've had Dyno'd with K&N was my bike. It went from 122 rwhp to 130 rwhp. When I rebuilt that motor, cylinder wear was a non factor.
I'll take my luck in this.
Senior User
Joined: Sep 2003
Posts: 150
Likes: 0
From: NC
Originally posted by wendall
i guess it is all a personal opinion. the main question is why he is losing mileage. there are many opinions on that as well. i know that i wont be taking out the filter when i go in for service. is there anything that says i have to use motorcraft parts? i am not sure, i guess i should read some of the paperwork.
i guess it is all a personal opinion. the main question is why he is losing mileage. there are many opinions on that as well. i know that i wont be taking out the filter when i go in for service. is there anything that says i have to use motorcraft parts? i am not sure, i guess i should read some of the paperwork.
Cargo Master
Joined: Aug 2002
Posts: 2,013
Likes: 6
From: Cajun Country
Ive read posts where Ford voided warranties due to aftermarket filters like K&N being the problem of the service call.I didnt mean going in there with an empty filter housing!(some people
)
So,Joe Blow goes and buys a K&N filter and over oils it.Now his truck is running like s*** because his MAF is coated with oil.Now hes got to figure out why its running this way.Or Joe Blow does not oil his enough and lets all that dirt and dust to just be sucked right thru the filter into the engine.I think I prefer not being Joe Blow and keep my factory designed filter in there.
)So,Joe Blow goes and buys a K&N filter and over oils it.Now his truck is running like s*** because his MAF is coated with oil.Now hes got to figure out why its running this way.Or Joe Blow does not oil his enough and lets all that dirt and dust to just be sucked right thru the filter into the engine.I think I prefer not being Joe Blow and keep my factory designed filter in there.
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