I have an LE CC 4X4 with 800 ish miles on it and am getting according to the navigation system, a low of 10.5 and a high of 16.8 we are stiill in the break in period and I'm varying rpm's so we are using more gas. won't really start checking until we get 2000 miles on her or so. I mainly stay in 4th gear on the highway. Trying to help seat the rings. 