Car: 2007 Zafira B, 1.9 CDti 120 withRed box.
Tyres: Pirelli winter
Route: Frankfurt - Lille, unladen.
Fuel: standard Shell diesel, not the Optimax stuff or whatever it's called these days.
Average speed: First 20 miles at 80, then between 60 and 65.
Fuel used: 6.3866 gallons @ 51.56MPG.
I reckon I could get it even better but driving any slower than that for a long distance would just make me self-harm.
Anyone beat those figures?