Fewer than three weeks into spring, oil speculators are already thinking about the summer. Hedge funds and other money managers boosted bullish wagers the most since February, betting that refineries will need to buy more crude to accelerate gasoline output before the peak U.S summer driving season. Fuel supply is already tight, with consumers paying the most at the pump in seven months. U.S. refineries are processing the most oil since January as plants come out of seasonal maintenance, squeezing crude stockpiles for the first time in 11 weeks. Speculative bets on rising prices for West Texas Intermediate, the benchmark grade, are the highest for this time of year since 2006, U.S. Commodity Futures Trading Commission data show. “Refinery runs are up and as long as they are up, it’s mighty hard to get crude to build,” said Tom Finlon, the Jupiter, Florida-based director of Energy Analytics Group LLC. […]