don't put it in, just use honda filters.  k&n filters let through
significantly more grit than any other filter - this will decrease your
engine life accordingly.  they're fine for racers as they don't expect
long engine life anyway, but it's unlikely you'll see much difference in
performance compared with a clean factory filter unless you do extensive
engine work.  with factory filtration, you can get 300k+ miles out of
that motor.  google is your friend - there's real-life testing reports
out there on filtration performance.  there was a link from tegger.com,
but it's broken.

my, you /are/ susceptible to advertising aren't you!  it's just a
solvent/detergent, just like any other fuel component cleaner.  use is a
good idea.  paying extra for differentiation that doesn't exist is not.

Possibly you could go on the K & N site and see that they promise no
increase in HP or MPG for the filter alone, but do for CAI kits.

I had a K & N filter on my truck for ages.  Didn't see any increase in
MPG or performance, but on the other hand, did not experience the
negative effects that you would expect if the filter was not working
acceptably as a filter.  No excessive ring, cylinder, valve wear
manifested as oil use or compression loss, no seal leakage.

BTW, with regard to warranty, Toyota offers Borla as a factory option
which includes a high flow exhaust and a K & N style filter.  It is
badged Borla, but has the same sticker that K & N uses and looks a lot
like a K & N or one of their competing permanent, oil impregnated
filters.  I would suspect it is private branded to Borla.  I don't
think Toyota would void my warranty because of a factory authorized
options.  According to K & N no other manufacture will either.  I'm
waiting for non troll evidence that this has been done.

I believe the fuel cleaner is unnecessary if you use a good fuel.
Some have injector cleaners as additives.  Chevron/Texaco has techron
in my geographic area.

My $.02 worth

Frank

Then go with OEM.

K&N MIGHT get you one hp or so, but this will come at the cost of
greatly accelerated cylinder bore and ring wear. K&N filters allow quite
a lot more grit to enter the engine along with that extra air.

K&N filters also are susceptible to accidental over-oiling, which can
damage the mass-airflow sensor, a critical part of your emissions
control system.

K&N filters were originally designed for racing, not road use. In racing
you want every fraction of a hp you can wring out of your engine, and
you do not care if the engine is still running past the checkered flag.
Road-car users generally want the exact opposite of that.

You do not have to use anything at all, especially in a car that new. By
EPA edict, modern gasolines are chock-full of detergents already.

Now, if the car sits undriven for long periods of time, or is driven for
many very short trips where it never gets up to full operating
temperature, it would be wise to administer a bottle of Chevron Techron
once a month or two.