I knew I was going through this tank faster than I thought I should. I tracked my mpg for the last three tanks...I'm currently averaging 24.8mpg. I drive 10 miles each way - all highway. I am between 60-65mph the whole way. I probably add another 10 or so miles at 40-45mph once a week.
Before the last few tanks, I was at around 30mpg. I'm not using the A/C anymore than I used to, I'm not idling the car. Nothing has changed in my driving habits. It got real hot for a few days but has stabilized.
I guess I'm just floored. I expected much better than this. Heck, with my old HHR I got 22mpg even with A/C on and city only driving.
My car is a 2013 Cruze LS. I use 87 octane - no ethanol.