Qingdao relevant person in charge told reporters that want to upgrade from country to country, four three oil oil refining enterprises need to increase the hydrogen plant and a hydrocracking unit . These companies need to increase investment . "Light desulfurization a ton of gasoline will increase the overall cost of about $ 300 , which will further increase the cost of refining companies ." Qingdao Petrochemical relevant responsible person said earlier .oil equipment , said that the oil companies for the construction of two sets of desulfurization equipment to upgrade the construction cost , it is up to more than 20 billion . Costing and the State in accordance with the price of oil required to upgrade the country four standard gasoline per ton than the country, three standards a lot more expensive gasoline . Oil press machine  Heilongjiang Road, near the gas station , the staff said that the gas station a total of seven tankers , oil supply from the refinery . "From the country, three to four countries to upgrade to our gas station is no technical problem ." Staff said .