Diesel fell 0.7 cent to $4.027 a gallon, turning around last week’s 5.8-cent gain, while gasoline fell for the seventh time in eight weeks. Gasoline dropped 4.3 cents to $3.394 a gallon. The motor fuel has declined 45.6 cents since early October, rising only once, a 0.8-cent gain last week. The diesel decline leaves trucking’s main fuel 9.6 cents over the same week a year ago, while gasoline is 10.4 cents higher than the same week last year. Last week’s diesel jump was the biggest in three months, since a 6.3-cent increase on Aug. 27. It had declined 17.4 cents in five consecutive declines before last week’s gain.