I bought a brand new maxima in april 06...it has about 6000 miles on it. On the highway I average about 27 to 30 mpg but in the city i average only about 14 to 17 mpg. I used mobile 1 5w30 since 1000 miles, change the oil again at 6000 miles. I put an KN air filter, and installed activetuning grounding kit....Anybody have any ideas? Please help me out...or is this normal because the car is not broken in yet.
