My fuel tank holds 80 litres.
If I put 75 litres in and save 10c a litre.. I've earned 7.50€. To earn that, it's another 1.88€
That gives me. A notional 9.38€ to spend on beer.
A litre of Lidl beer is 98c.
So for almost no effort, I'm 9½ litres of free beer better off.
It would be madness not to do it.
That's why Yorkshireman happily drive to Spain.
Its called " Yorkshire-nomics.".