Best thing you could have done.

This is the problem.
Some change it for the mileage and those of us with willpower stay off the throttle and get added mileage driving like Gramma.
Others of us change it, become more addicted to the right pedal and lose a little mileage due to driving style.

My average before my CAI was 20 ish

Then after install it was 21 ish

Now with new computer and excellent running engine i think i got 20 on this tank and 17.5 before that. I should replace the O2 sensor just to see if that helps... I have pulled above 21 only rarely.

I haven't put enough miles on to tell, since I did my intake over the weekend, but I agree, you can get addicted to the "Happy Pedal". I try to only use it when I need it, to get up to speed on an entrance ramp, or to pass a truck on the freeway or something, but when I do need to do that, Oh man, it'* good.

Pretty much it comes down to this: People with high self control see a gain. People with little/no self control....well, their mileage falls through the floor

Drive an L67 and we'll see what happens to your self control Logan.

Let CorvetteCrazy drive the same car w/you in the passenger seat and we'll see what happens to the bladder control...lol (He was at NEBF.. He left more rubber than DriverJohn at WCBF )

JDB < K&N sound

I got addicted to the sound and can't keep my foot off the pedal now, and milage still went up 3! (23.5 to 26.5 highway)

Life'* too short for self control...let 'er rip!