My on-board computer has finally calculated that I can drive 474km on a full tank of bio-ethanol. This is only 77% of the distance, that I used to manage of a full tank of petrol.
I knew in advance that this was going to be the case, but now I have figures to back it up.
In other words, I need 30% more litres of bio-ethanol than petrol to travel the same distance.
Since bio-ethanol costs 0.899EUR per litre, a 30% increase means an effective price of 1.16EUR per litre, which compared to around 1.42EUR for super (95 octane) at the moment, is still a good bargain.
It’s just a shame, that I have to fill up so often!