Analysts say Americans have now paid $21.7bn more to fill their tanks since the start of the US war on IranExxon and Chevron quarterly earnings fall despite soaring oil pricesSign up for the Breaking News US newsletter emailThe average price for a gallon of gas in California rose to $6 this week as fuel prices across the US reached their highest level in almost four years.The American Automobile Association reported on Friday that California consumers were paying an average of $6.06, while the national average hit $4.39. The Golden state is the most expensive US market for gas but costs have also risen nationally with a 27-cent rise this week following two weeks of falling prices, AAA said in a statement. Continue reading... ...read more read less