2015 Ford Mustang Owner Manual Printing 1 - Page 133

Fuel and Refueling If the fuel fill inlet was not properly closed, a Check Fuel Fill Inlet message may appear on the instrument cluster. At the next opportunity, do the following: 1. Stop your vehicle as soon as safely possible and shift the transmission into park (P). 2. Open the fuel filler door and remove any visible debris from the fuel fill opening. 3. Insert either the fuel fill nozzle or the fuel fill funnel provided with the vehicle several times to allow the inlet to close properly. This will dislodge any debris preventing the inlet from sealing. If this action corrects the problem, the message may not reset immediately. It may take several driving cycles for the message to turn off. A driving cycle consists of an engine start-up (after 4 or more hours with the engine off) followed by city or highway driving. Continuing to drive with the message on may cause the service engine soon lamp to turn on as well. Filling the Tank For consistent results when refueling: • Always switch the ignition off before refueling. If you leave the engine running, you will get an inaccurate reading. • Use the same fill rate (low-medium-high) each time you fill the tank. • Allow no more than two automatic shut-offs when refueling. Results are most accurate when the filling method is consistent. Calculating Fuel Economy Do not measure fuel economy during the first 1000 mi (1,600 km) of driving (this is your engine's break-in period). A more accurate measurement is obtained after 2000 mi (3,000 km) to 3000 mi (5,000 km). Also, fuel expense, frequency of fill ups or fuel gauge readings are not accurate ways to measure fuel economy. 1. 2. 3. Fill the fuel tank completely and record the initial odometer reading. Each time you fill the fuel tank, record the amount of fuel added. After at least three fill ups, fill the fuel tank and record the current odometer reading. Subtract your initial odometer reading from the current odometer reading. Calculate fuel economy by dividing miles traveled by gallons used (For Metric: Multiply liters used by 100, then divide by kilometers traveled). FUEL CONSUMPTION Your fuel tank's advertised capacity includes the fuel indicated by your gauge plus an empty reserve of fuel that remains after the fuel gauge indicates empty. See Capacities and Specifications (page 267). • The empty reserve makes sure that you do not run of out fuel until after the gauge indicates empty. Due to the empty reserve, you may not be able to refuel the full amount of the advertised capacity of the fuel tank even when the fuel gauge reads empty. 4. 5. • Note: The amount of fuel in the empty reserve varies and should not be relied upon to increase driving range. 130 Mustang (), enUSA, First Printing