What's the fuel consumption for the 2.0 car on the highway?

Constant fuel consumption of 6 liters per 100 kilometers.

My fuel economy is 5.6 liters per 100 kilometers.

It depends on how you drive. If you maintain a speed around 110 km/h, then about 6 liters is no problem. But if you're always pushing the limits, then 8 liters or even more is possible.