The big picture
Last year, U.S. ground transport fuel consumption was 200 billion gallons, including 146 billion gallons of gasoline and 54 billion gallons of diesel. So our average fueling site in the United States sold 1.3 million gallons annually, or 25,000 gallons per site week.
Assuming this crisis lasts all year, gasoline consumption will fall to 134 billion gallons and diesel consumption will grow to 55 billion gallons, for a total ground fuel consumption of—worst case—189 billion gallons or 23,000 gallons per site week for the average retailer, or a consumption decrease of 8%.