Gill wrote:
> C. E. White wrote:
>> "My Name Is Nobody" > wrote in message
>> news:OoQij.6492$6F6.2631@trndny09...
>>> "C. E. White" > wrote in message
>>> news:478b5998$1@kcnews01...
>>>> "mrsunshine" > wrote in message
>>>> ...
>>>>
>>>>> I would like to know if anyone has experience with the K&N 63 series
>>>>> aircharger system on a Mustang GT. Is the reported 15 hp boost
>>>>> there? More importantly, has anyone had challenges with their Ford
>>>>> warranty as a result of installing this item? Thanks!
>>>> See http://home.mindspring.com/~ed_white/id5.html for my opinion.
>>>>
>>>> Ed
>>>>
>>> While I agree K&N filters are a potentially dangerous and certainly a
>>> pain in the ass, this statement "Claims of greatly improved fuel
>>> mileage for K&N Filters are bogus." Is absolutely FALSE!
>>>
>>> I still have the mileage records of every fill up for a 1994 Taurus
>>> SHO that I bought new with 7 miles on it, to over 70,000 miles. This
>>> car was a daily driver commuter car that went 70 mostly freeway miles
>>> each weekday. The first 25,000 miles it consistently recorded 24.5
>>> MPG each fill up. A K&N air filter was installed into the stock air
>>> box, zero other changes. The fuel mileage took an immediate (and
>>> documented over 50,000 miles) jump up to 26.5 MPG, and stayed there.
>>
>> But why? Explain how the K&N could increase fuel economy on a fuel
>> injected engine. Except at WOT, the air filter restriction is trivial
>> compared to the throttle restriction. The MAF and other part of the FI
>> control system are measuring the mass of flow through the induction
>> tract, and they don't know whether the flow is restricted by the air
>> filter or the throttle plate. With an older carbureted engine, I can
>> see how a restricted air filter upsets the fuel air ratio and affects
>> gas mileage. This is not the case for modern fuel injected engines. I
>> don't know why your mileage jumped, but I suspect other factors are at
>> play.
>
> Exactly, I don't believe an air filter will change mileage. The auto
> makers would be on it and so would the rest of this small world.

Ever notice that an engine running with a dirty filter sees a drop in
gas mileage? The same principle applies to an OEM filter verses a
filter that flows better (i.e. a K&N etc.). There are two things that
can happen when air flow through an engine is made more efficient. One
is an increase in horsepower and the second is an increase in mileage.
Sometimes both can happen simultaneously. If you don't believe me then
take your air filter and clog it up and run your car for a tank of gas
then put in a new one and see whats happens to your gas mileage and
power output. I'll bet the farm that they both will see a substantial
increase when a clean filter is installed.

> I do however see a two mile per gallon decrease when using the now,
> "required by law in Oregon" E10. ****es me off!

That's because the overall specific energy of E10 is less than pure
gasoline. This is why going to biofuels is a horrible idea, IMO. We
use up our top soil to fill our tanks and at the same time increase the
cost of food substantially. I would rather eat for a reasonable cost
than fill up my tank with something that gives me less mileage, for
about the same cost, than evil old 100% gasoline.

>>> I personally would NEVER use a K&N oil bath air filter again. My
>>> preference is to filter my intake air as well as I possibly can and I
>>> don't think the K&N's do that as well as the stock paper filters....
>>> But throwing out a blanket statement that fuel mileage gains from
>>> their use are bogus, is simply bogus. You may or may not like K&N
>>> filters, I don't, but for crying out loud, don't post bull**** about
>>> them.
>>
>> I don't believe my opinion is BS. I don't see any reason to expect a
>> K&N filter to increase the fuel economy of a modern fuel injected
>> engine. Not even K&N makes the claim that their filters will increase
>> fuel mileage Go read K&N's carefully worded FAQ on this subject
>> (http://www.knfilters.com/faq.htm#1) - "we do not go so far as to make
>> a general claim that our air filters and intake systems will provide
>> an increase in mileage." K&N is willing to let you think their filters
>> might increase fuel mileage, but they are not so foolish as to claim
>> that they will.
>>
>> Ed
>>
>
>