1996 Ford Aerostar Owner's Manual - Page 258

You may occasionally hear and/or feel a slight thump occurring one or two seconds after a gentle stop. This is normal and generally occurs with the fuel tank 3/4 full. It is caused by the wave action of the fuel within the tank. Running Out of Fuel If your vehicle runs out of fuel, try to stop on level ground away from traffic. Add at least two gallons (8 liters) of fuel to start your vehicle again. If your vehicle is not on level ground, you may need as much as five gallons (20 liters) of fuel to start it. NOTE: Avoid running out of fuel because this situation may have an adverse effect on modern powertrain components. You may need to crank the engine several times before the fuel system starts to pump fuel from the tank to the engine. Fuel Economy Fuel economy is an estimate of the efficiency of your vehicle and can be calculated as Miles Per Gallon (MPG) or Liters Per 100 Kilometers (L/100K). Do not calculate the fuel economy during your vehicle's break-in period. This would not be an accurate estimate of how much fuel your vehicle will normally use. To calculate fuel economy: 1. 2. 3. Fill the tank completely and record the initial odometer reading. Every time you buy fuel record the amount (in gallons or liters) purchased. After at least three to five tankfuls, fill the fuel tank and record the final odometer reading. 280