Increase in MPG/K&N

[darrsi]

Does everyone who has fitted a K&N filter notice an improvement in long-term fuel economy?
It may be freer-flowing, but should that make a difference?
The mixture is regulated by the carbs themselves according to the velocity and density of the air passing through, the throttle doesn't spit in a set quantity of fuel dependent on how far you twist the grip.
MPG is dependent on so many things: rider behaviour, road conditions, how fresh the oil is, temperature, tyres etc., that it is hard to point a finger at a particular item and say it's responsible for an increase in economy unless all the other factors can be eliminated.

Just a general breathing difference i reckon, with much better throttle response, which to me is a huge improvement in itself.