The larger fuel cards are supported by as many as 7,800 fuel stations, which is around 90% coverage, whereas some can only be used at a number closer to 3,500. The types of locations your employees are driving through will affect this decision, too. The stations supported by some providers are more regional, whereas others are better for big cities. It all depends on what you want the fuel card to do. The issue here, of course, is that having a limit on where an employee can refuel can cost more time, and therefore more money.