[Alan Cohen]

Cold air intakes do work , they do this by allowing the engine to breath better. But there is a down fall to allowing more air into the motor. The filters medium used in the cold air intakes do not filter the air as well as the original paper filters.
Another thing you can do is put a free flowing exhaust system in to complement the cold air intake. Doing this will help the engine breath even better.
I would recommend having someone reflash the engine control computer so the changes can take effect. Without a reflash of clearing of the engine control computer, it will take a long time for the changes to take effect.
Using a good synthetic motor oil like MOTUL 5100 T4 will cut down on the internal friction of your engine improving the mileage. I use it in my car and I've noticed a 5% increase in fuel mileage.
For more information like this and to find high quality, honest shops to do the installation, go to [link removed by moderator].