I was gettin 11.5-12 before I put my Airaid on. It got a tad better milage in town but no differance on the highway. I removed the Airaid and went back stock, hated the noise, but I replaced the OEM paper filter with a WIX paper filter. The Wix has about 30 - 50 % more paper to it. Longer or taller pleats. I put that in and milage picked up to 12.5- 13 now.
My average over 8200 miles has been a solid 12.4. That includes a road trip from DFW to Colorado and back with a bike in the bed. Drive like grandma on my way to work and get as much as 15. But when I get home after traffic and a lot of full throttle manuvers it reads 11.5. AHhahaaaaa.
My worst tank was an average of 8 mpg. It sure was fun because it was all in town on city streets!
BDRAG
I love terrorizing DFW with full throttle exhaust sounds.