newbie to the x, sorry for same old question

[j05gtvert/05lim]

i have an 05 limited 4x4 with 373 gear. she has 23000 miles and i'm getting 14.9 around town and 17.6 on hwy. i noticed people changing o2 sensors on another post, would this be necassary on my beast to get better gas mileage? and would putting the k and n filter kit void my warranty assuming this helps with gas mileage. any other advice to get my mileage up. this is my first x and i love it, i had 3 explorers and on my 13th stang. so i am just learning about the x.

 

[jimboh247]

With only 23000 miles, I would'nt waste the money on O2 sensors. The mileage you are getting is about right. I wouldn't expect much better.