Quite bad, actually. 3.3 l/100 km at 60 km/h makes 450 g/kWh (1450 kg Crr 0,007 CdA 0,67). The ecoboost has a top BSFC of 250 g/kWh and still very good efficiencies at lower loads. With some P&G, 2.5 l/100 km at 60 km/h should be possible.
Plattner's 2.2 l/100 km is already more impressive.
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