Desulphurising crude oil has obvious and substantial benefits. But by taking out the sulfur, we reduce air pollution directly. Thus public health is better protected and such respiratory diseases as bronchitis and pneumonia are less frequent. And it means there are fewer dollars spent on upkeep of cars because sulfur can eat into engine parts. Not only that, but desulphurization raises fuel efficiency so that for an additional thousand miles at 25 per gallon there is no danger of running out before getting back home--and no need to stop to fill up either. For a refinery alone, and for a fuel supplier as a whole, meeting environmental regulations attracts no fines and improves its reputation. In the end, investment in desulphurization technology leads to long-term cost savings. That is an actual advantage for the users, who individually are concerned with both environmental responsibilities as well as operational efficiency.