Diesel rose 8.2 cents to $4.104 a gallon this week, the fourth straight increase and the highest price since October, while gasoline rose for an eighth week, the Department of Energy said. Gasoline rose 7.3 cents to $3.611 a gallon and has risen 35.7 cents in eight straight weeks of increases, DOE figures showed. Both fuel prices are the highest since Oct. 22, 2012.