[whiteyjfm]

Driving "days per tank" does not mean anything. The car takes 14 gallons. How many miles are you driving? What is your driving stile? It has a turbo engine, if you drive it hard it will use gas. The range to empty is the average of your current consumption. If you drive in town it will go down faster, if you drive uphill it will go down faster, if you drive downhill it will increase.

For mixed driving you should get around 23 mpg. Next time, you fill up, devide the miles driven by the gallons and see what it is.

 

[whiteyjfm]

Good luck.