Now for the excuses. It was wet: very, very wet. And it was very, very wet for almost the entire trip, save for about 20 minutes of sunshine yesterday going past Liverpool. Strong winds were another issue, especially heading south today. We saw an economy figure as high as 85.9mpg yesterday, but it dropped to 82.6mpg today.
The weather made the trick of slipstreaming lorries very tricky as the spray made it hard to see, especially in the dark. I stopped short of any other eco tricks such as taping up gaps and over inflating the tyres, as this doesn’t really prove anything about a car’s capabilities off the shelf.
This was all about careful use of the right foot and reading the road ahead.
I knew from previous experience in attempting 1000 miles in a Seat Leon Ecomotive last year that there was 75 miles of range left when the indicated range and needle both read zero, allowing me to travel 925 miles on a tank. So using this shaky logic, the Golf had about 850 miles of range available in these conditions on a sole tank of diesel.
But the plot thickened somewhat when we came to refuel the Golf; having burned off an estimated three litres (driving a bit quicker than 50mph…) on the way to a fuel station, the tank was full to bursting after 40.97 litres from the black pump.
So again using some rather shaky maths (forgive me, I’ve no calculator to hand and can only see the back of slow moving lorries in my head…), our 781 miles were covered using around 43 litres of diesel. Say the reserve was seven litres, then to use that at the same average economy figure we’d have managed an extra 125 miles when the range dropped to zero, pushing us above 900 miles.
Still short of the full 1000, mind. But close enough to think that with kinder weather, we might have got closer still. I’ve no doubt it could do 1000 miles on one tank in optimum conditions around a test bowl or even smoother, and less hilly roads elsewhere in the world.
As for achieving this on a UK motorway route like our one, it would need a bigger fuel tank. Like it’s (heavier) Mk6 Golf predecessor, which had a 55 litre one. Next time...