(CNN)– U.S. energy costs are at a grim milestone. The average price of diesel is back up to about $5 a gallon, according to AAA. Most tractor-trailers run on it, so experts say the spike could put inflationary pressure on a long list of products. This isn’t the first time during the Iran War that diesel has been this expensive but the price had subsided on hopes of ending the conflict. Some experts warn gasoline soon could reach $4 a gallon. AAA says the average cost of regular in South Carolina is $3.67 a gallon which is up seven cents from Wednesday, July 16. Categories: Local News, National News, News, Politics Tags: AAA, gas price, Gas Prices, Iran, Iran Missile Attack, Iran Missile Strikes, Iran War, national gas prices, Oil Prices, SC gas prices, South Carolina gas prices, U.S. economy ...read more read less