K & N

[judybe83]

Originally Posted by [email protected]

The OBC uses a flow meter to calculate MPG and if anything it is consistent--manually dividing the gallons at the pump into the miles traveled is not very accurate--every pump nozzle shuts off at different times and you never get a fillup unless you overflow the tank--and that will trip a fault in the computer. Also the gas from the underground tank may be cold--pump it into your tank and it will warm up and expand--
BTW this is the 21st century--computers replaced pencil and paper

hhmm lets see if i understand

our hand held GPS says we've traveled 100 miles and the OBC says 105 = OBC correct

our hand held calculator says 20 MPG calculated by using OBC provided miles divided by gals provided by pump, OBC says 21.5 MPG = OBC correct

these calculations have been made for every (almost) tank of gas for 40000 miles = OBC correct

ab

[judybe83]

Originally Posted by YANNIS

what ???????????

the cost in europe for a K&N filter is usd 180 !!!

are you sure ?

we paid $48.00 (US) 3 years ago.

ab

[[email protected]]

Originally Posted by judybe83

hhmm lets see if i understand

our hand held GPS says we've traveled 100 miles and the OBC says 105 = OBC correct

our hand held calculator says 20 MPG calculated by using OBC provided miles divided by gals provided by pump, OBC says 21.5 MPG = OBC correct

these calculations have been made for every (almost) tank of gas for 40000 miles = OBC correct

ab

This would hold true on a flat road--stretch out a length of ribbon 3 foot long and pretend it is a road--then put some gentle curves in it and measure it--it got shorter if measured on a straight line--this is what the GPS sees--if you are in hills the car OBC measures actual surface distance traveled up and down the hills--the GPS sees a coordinate location by triangulating two locations from the satellite and will usually show shorter distance. I noticed this with my portable Garmin in 2 different cars--the Garman always posted less miles. And again using the gallons shown on the gas pump is very inaccurate as stated in my last post--no two pumps are the same on shutoff levels--can vary up to 1 gallon--and who knows the accuracy of the pump flow meter itself. Although automakers may fudge the parameters in their favor slightly--the fact still remains that the flow meter and OBC will be very consistent compared to reading gas pumps. Happy motoring

[judybe83]

Originally Posted by [email protected]

This would hold true on a flat road--stretch out a length of ribbon 3 foot long and pretend it is a road--then put some gentle curves in it and measure it--it got shorter if measured on a straight line--this is what the GPS sees--if you are in hills the car OBC measures actual surface distance traveled up and down the hills--the GPS sees a coordinate location by triangulating two locations from the satellite and will usually show shorter distance. I noticed this with my portable Garmin in 2 different cars--the Garman always posted less miles. And again using the gallons shown on the gas pump is very inaccurate as stated in my last post--no two pumps are the same on shutoff levels--can vary up to 1 gallon--and who knows the accuracy of the pump flow meter itself. Although automakers may fudge the parameters in their favor slightly--the fact still remains that the flow meter and OBC will be very consistent compared to reading gas pumps. Happy motoring

[[email protected]]

Originally Posted by judybe83

HUH????

[xnsf]

the topic changed?

[rebound]

Originally Posted by xnsf

the topic changed?

This:

Originally Posted by [email protected]

This would hold true on a flat road--stretch out a length of ribbon 3 foot long and pretend it is a road--then put some gentle curves in it and measure it--it got shorter if measured on a straight line--this is what the GPS sees--if you are in hills the car OBC measures actual surface distance traveled up and down the hills--the GPS sees a coordinate location by triangulating two locations from the satellite and will usually show shorter distance. I noticed this with my portable Garmin in 2 different cars--the Garman always posted less miles. And again using the gallons shown on the gas pump is very inaccurate as stated in my last post--no two pumps are the same on shutoff levels--can vary up to 1 gallon--and who knows the accuracy of the pump flow meter itself. Although automakers may fudge the parameters in their favor slightly--the fact still remains that the flow meter and OBC will be very consistent compared to reading gas pumps. Happy motoring

...has nothing to do with K&N filters. Hence, ""

[BM2W]

I have one in my '04 3.0, with no noticeable increase in intake honk. I got it for $39 online somewhere. I've been using K&N's on bikes and cars since the mid-70's. My experience has been that they do help MPG slightly ( ~.5 - 1.5%). I've also had Autothority CAI rigs (with conical K&N filters) on an '87 325is and a '96 328is and both were good for +1-2 mpg, better throttle response, a lovely intake noise, and a small seat-of-the-pants performance gain. YMMV

[YANNIS]

Originally Posted by mhainen

Jannis, the cost in US $ was correct. I purchased at "Auto Zone". Maybe I should pack one in my luggage this summer and bring it to Europe for you We are thinking of Greece this year, but I may go back to Munchen for some more of that great beer!

Bis spüter!
Mark

SURE THANKS !!!! SEE YOU HERE