Marcel Krähenbühl lets the Petrologistics tractor-trailer combination roll slowly on to the scales: 39,980 kilograms, bang on target. The three compartments of the tanker semitrailer with the big BP logo on the side are full to the brim with petrol and diesel fuel. The first trip of the day can begin. “A good thing that I still do a lot of sport,” says Krähenbühl with a smile. He was once a semi-professional in Switzerland’s third soccer league. “If I’d been 20 kilos overweight, it would have been a close call!” The 45-year-old then carefully steers his Antos 1843 Loader from the premises of the tank depot in Rümlang near Zurich and merges with the existing traffic.