j2catfish
Newport, NC, U.S.of.A.
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Joined: 08/23/2004
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I have run the K&N filter on my real truck for about 140,000 miles out of a total of 172,000 miles. I use an oil analysis program on my engine, and have only had one report of slightly higher silicon. That was due to not properly seating the K&N after cleaning the filter - my bad. Your experience/use may vary, but not all folks are unhappy with K&N.
F350 Diesel; Teton 5er;
Native Texan - Transplanted Tar Heel
Retired USMC
Semper Fi !
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Dave H M
IL
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Joined: 08/11/2006
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save you money and get one of those mega size exhaust pipe extensions. 
I WOULD recommend a K&N for someone I really don't like.
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camping man
Central Fla.
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Joined: 09/01/2001
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They were great back in the 70's ,when we didn't know better. Also I'd forget running a programmer too, unless you want to be your own warranty center. My buddy bought a programmer for his Duramax, now he doesn't really like the way it operates his tow/haul mode, so he took it out, but he probably already kissed his engine warranty good bye if it left a footprint.These trucks can already pull a house of it's foundation, why more power?
05 Dodge 2500 Quadcab CTD NV5600/3.73rears
97 27ft.Sprinter 5er
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Ram4Sam
So Cal
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Joined: 09/28/2001
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j2catfish wrote:I have run the K&N filter on my real truck for about 140,000 miles out of a total of 172,000 miles. I use an oil analysis program on my engine, and have only had one report of slightly higher silicon. That was due to not properly seating the K&N after cleaning the filter - my bad. Your experience/use may vary, but not all folks are unhappy with K&N.
I have used them on a number of different vehicles and when installed properly, they work fine. I have also done oil analysis which have showed just that. Science and chemistry trumps old wives tales and internet rumors.
Sam
2001 Dodge QC2500 coal burner, 6spd,BD brake,other stuff!
Chipped and loving it, see you at the top!
2008 Thor Jazz 2870UK 5er
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8.1 Van
Millstone NJ
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Joined: 03/20/2008
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I would never use a K&N filter on a turbo-diesel and use a stock AC Delco air filter on my 8.1 van. I use a K&N oil filter on my 8.1 because it's a great oil filter with 1" nut welded to the bottom that makes it easy to put on and take off. I did have a Gale Banks Stage III setup with SS headers and K&N ram air setup on my 34ft MH that worked great but that was a 7.4 big block. On my 7.3 & 6.0 PSD's I used stock air filters.
FKA PSDExcursion
2002 Chevy Express LS 3500 8.1 155" WB passenger van 3.73 posi (GT4/G80)
41 Ft 2003 Thor Citation 41-ZBSR TT w/ Hensley Arrow
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amxpress
Clayton, NC
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Joined: 04/14/2007
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I put one in my M-I-L's vehicle at her request....Well, I TOLD her I put one in.
Even I wouldn't do that to her...
2007 Dodge RAM 2500 Quad Cab w/6.7 Cummins
2008 Palamino Sabre 31RKTS
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Travel in peace...leave the M-I-L at home.
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Jarlaxle
New England
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Joined: 11/18/2006
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I run them on several vehicles (including my truck)...never had any problems, and the one in my Caddy has over 100K. On some vehicles, it makes a noticeable power increace (my Caddy is one).
John
1984 Ford B-700 school bus conversion, Thomas body
A bunch of other vehicles
3 nutty cats (Maya, Vierna, Briza)
One lazy dog (Marmaduke)
One wife (Liz)
"A wasted youth is better by far than a wise and productive old age"
-Jim Steinman
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LarryJM
NoVa
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Joined: 11/09/2007
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Tripwire wrote:I'm picking up my new Ram 3500 Diesel tomorrow from Dave Smith in ID, I've been told by several people to use a K&N air filter as it lets in more air and that this is a good thing...then a guy I know who drives an 18 wheeler says..NO!! bad things, lets in too much particulates and will trash my new eng....
So...what's the word from those of you who have really used a K&N...does it help? with power and fuel usage?
Tripwire
Based on everything I have read for the past 7 years on Ford diesel sites, I would pass on putting a K&N on a diesel. I do run the Amsoil foam filters on my Van, but I also do an OA every oil change and so far they have done a great job.
Larry
2001 standard box 7.3L E-350 PSD Van with 4.10 rear and 2007 Holiday Rambler Aluma-Lite 8306S Been RV'ing since 1974. TRAILER MODS
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92DakotaHD
Indiana
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Joined: 09/13/2006
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On a normally aspirated vehicle it may be an advantage. My Tahoe got a noticable gain in MPG with a K&N. But when you have a turbo cramming air into the motor, the filter doesn't really matter.
Your limitations are probably going to be the intake itself and the exhaust. A buddy I know just had his turbo get louder with a new air-box replacement, but what really helped was a 5" exhaust.
1992 Dakota 2WD 5.9L V8 (NOT Stock)
Headers, FMS Injectors, Ported TB, MP PCM (not good for towing),
2005 Chevy Tahoe Z71- Bermuda Blue, A/T Revo 265/70 "E"
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A newbie, any tips please share!
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wayne_tw
South Dakota/Georgia
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Joined: 07/21/2007
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You should do EXACTLY what the people who designed and built your engine say to do. And that does not include a K&N air filter. Lets think about it....if it did all it claims to do, don't you think it would already be on your truck???
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