Hi Phil.
Don't think you are alone regarding filters.
K&N filters have their uses but also have their downside. They are great for extracting a few horses on high revving, tuned engines. They perform well on older carburettor engines and engines that don't conform to current emission regulations.
The downsides though can lead to expense. They don't filter as effectively as good quality paper filter can do, the addition of oil on a modern engine with it's various sensors can cause havoc, they also require more maintenance and their effectiveness at filtration drops as the oil gets sucked into the engine.
Fuel consumption and power wont improve as the ECU via the various sensors will compensate for any small increase of air.
At the end of the day though it's your choice Phil
