CIRCLE, Mont. — Gil Gasper stopped short of emptying his milk jugs when he heard that farm-delivered, weatherized diesel had dropped to $1.73 a gallon. In farm country, where fuel gauges might not hit full for thousands of gallons, a price below $2 is a big deal, especially with grain prices declining. There’s even speculation that lower prices could be on the way. “From my standpoint, related to all the