By James Rodger Martin Lewis has advised motorists never to hit the garage for fuel at 5pm. The host of BBC Sounds podcast and regular on ITV shared that those who choose to fill up their cars in the evenings are tipped to get just a “little bit more” petrol or diesel. He revealed: “Talk of filling up at night getting you more is a slight urban myth, as the difference is minuscule pennies at best. Fuel pumps are calibrated by volume, so fill up at night when it’s colder and you get a tiny, tiny bit extra.” According to MoneySavingExpert.com (MSE), drivers stand to gain mildly more petrol if th…