I get about 400 on mine primarily highway driving, 91 octane and average 70mph. I noticed that if you drive highway for the whole tank once the empty light comes on if necessary you can get about 60 miles before empty..bad habit of mine sometimes that I would not recommend though

 

170k and get 27 mpg. On hwy I think I can go 400 when the light turns on.

 

im in canada so im in KM, i have gotten over 650km to a tank which is over 400 mpg consistently with a mix of highway/city driving. im sure i can get more if it was straight highway.

 

I'm getting between 300 and 350 using 93 octane. Just filled up with 89 on Tuesday to do a comparison. Same driving conditions (mostly Highway, little City).

 

On the long trips through AZ, I got around 400 miles from the tank. This was when cruising for 350+ miles at 70mph. At my regular driving I am at 13-15mpg, but it is my driving and not the car.