I've put a K&N air filter in my V70R, and while I got a good seat-of-the-pants kick in full throttle performance, it's gas mileage actually decreased (mostly pretty sedate highway driving except for the ocassional pass where the other damned driver accelerates to _try_ to keep me from passing). I disconnected the battery for 5 minutes (as I've heard recommended to clear the computer of "memories" of the old filter) after installing it, too.

I've gone about 3000 miles since then, and I've actually lost 1.5 mpg. I'd keep the filter in just for the performance benefits, but I was wondering if anybody knew of something more that needs to be done to get the computer to change it's program based on the new air flow...

I tried searching on K&N, but I got too many hits with no useful information :-)

On an unrelated note - anyone know of a computer chip / replacement in the works for the 2000 R?

Thanks!

Mike