One major correction:
Originally Posted by Voyager
I would be leery of a K&N filter if they are esigned anything like their car filters (oiled foam). Two reasons:
1. The K&N filters almost always flow more dirt than stock paper element filters along with their greater air flow.
2. The oil can foul sensors in the FI system.
I haven't seen a K&N filter for the LT, so maybe it isn't oiled foam, but if it is...
K&N does NOT use "oiled foam". They use a fiber media (most likely a cotton/poly blend) permanently trapped between wire mesh.
Since I live in the dust capital of North America:
I've run K&N filters since new in my 1988 Chevy Dually with 210,00 miles, my 1992 Ford 1 ton van with 120,000 miles, my 2002 Mercedes 320 with 40,000 miles and my wife's 2002 Honda CRV with 45,000 miles. Also my 1993 Mazda RX7 twin turbo with 85,000 miles. You know
how sensitive turbos are to dirty air. None of them burn any oil, (except the rotary which is designed
to) and I've never had any issues with sensors. The Chevy has the original throttle bodies still going strong. I always toss in a bottle of Techron every few years right before an oil change that I buy at Costco for about half what I can buy it for at a Chevron station.
The only two that are really easy to see deep into the throttle body or fi system are the Chevy and the Mercedes - they are as clean as a whistle.
I also run one on my blimp! (yeah, I have a real airship and commercial rating to go along with it)
I figure going with the K&N's has literally saved me hundreds of dollars over the life of these vehicles, with absolutely no adverse effects. I'm also not throwing dozens of filters into the landfill.
I would run them on all my bikes but generally speaking they have not offered what I needed, with a few exceptions the past several years, as they have ventured more into two wheel territory.
I would imagine any issues reported have to do with under oiling - which of course will let fine particulates through - or over oiling which may allow some excess to get sucked in. A lot of back yard hacks use transmission fluid on the media since it looks and tastes like the K&N fluid, and of course costs about 80% less. The K&N fluid is definitely
tackier and more viscous.
My .02 cents worth.