U.S. retail gasoline prices moving into the Labor Day holiday are at historic lows, but could be even lower had it not been for refinery problems, AAA said. “Americans should find good deals on gas prices in most parts of the country heading into the busy Labor Day weekend,” AAA spokesman Avery Ash said in a statement. The motor club reports a national average retail price for a gallon of regular unleaded gasoline at $2.42, about 3 percent less than last week and 8.3 percent lower than one month ago. The average price of $2.60 for August was the lowest for than month since 2005, but still high relative to the cost of crude oil. The U.S. benchmark price for […]