I just purchased a used 2000 villager sport with 77k miles on it. I filled it up after purchase. I noticed after that I had only gone 178 miles and gone through 3/4 of the tank. I replaced a faulty O2 sensor(bank1 sensor2). That improved the fuel economy slightly. I did a tune up this weekend. The mileage is still poor. I hope somebody can help me in the right direction.