Diesel rose 8.2 cents to $4.104 a gallon, the fourth straight increase and the highest price since October, while gasoline rose for an eighth week, the U.S. Department of Energy reported to NASSTRAC this week. Gasoline rose 7.3 cents to $3.611 a gallon and has risen 35.7 cents in eight straight weeks of increases. Both fuels’ prices are the highest since Oct. 22, when diesel was $4.116 and gas was $3.687. The diesel price increase follows last week’s increase of 9.5 cents, for a combined two-week jump of 17.7 cents, the biggest price increase in nearly two years. Diesel has risen 22 cents in four weeks of increases, after dropping 14 cents in seven consecutive previous declines. Each week, DOE surveys about 350 diesel filling stations to compile a national snapshot of average prices.