A rally in China’s diesel prices has pushed the fuel to a rare premium over gasoline as dealers scramble to scoop up supplies amid fears of shortages due to Beijing’s war on smog and possible tax changes.  Led by a spike in benchmark crude prices, wholesale diesel prices have jumped 11 percent since October to 6,700 yuan ($1,011) per tonne on Tuesday in eastern Shandong province, a 320 yuan premium to gasoline, according to consultancy Longzhong Information Group. Diesel, which normally trades at a discount to gasoline, touched a 500 yuan premium earlier this month, the widest premium in at least two years, even though the market remains well supplied. Sponsored “Diesel prices have been rising madly … almost every day […]