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Highlander Air Filter Installation and Type
7 messages, Last post on Jun 20, 2010 at 9:13 AM
You are in the Toyota Highlander Forum.What is this discussion about? Toyota Highlander, SUV
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#1 of 7 Air filter installation and type by marc52
Apr 05, 2010 (10:55 am)
Has anyone changed the air filter on a 2009 Highlander? Has anyone used a K & N replacement? Is there any mileage or horsepower gain?
#2 of 7 Re: Air filter installation and type [marc52] by steve_ HOST
Apr 05, 2010 (12:13 pm)
Replying to: marc52 (Apr 05, 2010 10:55 am)
K&N makes no claims for mpg improvements with their air filters.
#3 of 7 Re: Air filter installation and type [marc52] by mdhutton
Apr 05, 2010 (5:21 pm)
Replying to: marc52 (Apr 05, 2010 10:55 am)
I have not installed a K&N filter in my '08 HL yet, but on my last vehicle ('02 Envoy,) I did notice a small HP increase, but no change to MPG.
#4 of 7 Re: Air filter installation and type [marc52] by backpak
Jun 12, 2010 (1:46 pm)
Replying to: marc52 (Apr 05, 2010 10:55 am)
I purchased a 2009 Highlander in Aug, and on the way home I stopped and picked up a K&N filter, first thing I did was install it and put the Toy filter in the K&N box! Sure glad I did we just got back from a trip to Georgia (we live in CA) went through two dust storms in Arizona, cleaned it this morning looked like MUD 
coming out of it, installed the Toy filter in for a few days I'm going to clean the K&N again to make sure the dirt is gone!! I don't know if there was mileage or HP increase but I would not drive and car with out a K&N installed!!!!!!! 
Buy the K&N an keep the engine clean!!
- marc52 (Jun 13, 2010 5:36 am)
- wwest (Jun 15, 2010 9:47 am)
Replies to this message:
#5 of 7 Re: Air filter installation and type [backpak] by marc52
Jun 13, 2010 (5:36 am)
Replying to: backpak (Jun 12, 2010 1:46 pm)
It seems as though there are a few connsections that have to be removed first. Was it difficult and what did you do first? Also, please let me know if you notice any more mpg or horses. Thanks.
#6 of 7 Re: Air filter installation and type [backpak] by wwest
Jun 15, 2010 (9:47 am)
Replying to: backpak (Jun 12, 2010 1:46 pm)
K&N "oil" type filters are simply marketing SNAKE OIL...!! A very high percentage of that Arizona dust was probably ingested by the engine.
Nothing is "free", more inlet airflow, lower inlet restriction, will always mean more dirt into the engine.
Life is a series of compromises.
- backpak (Jun 20, 2010 9:13 am)
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#7 of 7 Re: Air filter installation and type [wwest] by backpak
Jun 20, 2010 (9:13 am)
Replying to: wwest (Jun 15, 2010 9:47 am)
No "SNAKE OIL" ~~~ K&N OIL ~~~ 
Have use them on many vehicles off/on road and much dust, always check them when clear and never found any dust/ sand in the out flow side!
Think what you must, But I'll keep using them till I quit driving!
P.S. N\K&N on a 1992 Explorer sold it to by the Highlander with 170,000 mi on the Odometer, and compression was equal on all 6 cylinders!
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