fuel FORD MUSTANG 2023 Owner's Guide

WARNING: The fuel system maybe under pressure. If you hear a hissingsound near the fuel filler inlet, do notrefuel until the sound stops. Otherwise,fuel may spray out, which could causeserious personal injury.
WARNING: Do not pry open thefuel tank filler valve. This could damagethe fuel system. Failure to follow thisinstruction could result in fire, personalinjury or death.
WARNING: Do not remove the fuelpump nozzle from its fully insertedposition when refueling.
WARNING: Stop refueling whenthe fuel pump nozzle automaticallyshuts off for the first time. Failure tofollow this will fill the expansion spacein the fuel tank and could lead to fueloverflowing.
WARNING: Do not overfill the fueltank. The pressure in an overfilled tankmay cause leakage and lead to fuel sprayand fire.
WARNING: Wait at least fiveseconds before removing the fuel pumpnozzle to allow any residual fuel to draininto the fuel tank.
1.Fully open the fuel filler door.
2.Select the correct fuel pump nozzle foryour vehicle.
3.Insert the fuel pump nozzle up to thefirst notch on the nozzle A. Keep thefuel pump nozzle resting on the fueltank filler pipe.
4.Hold the fuel pump nozzle in positionB when refueling. Holding the fuelpump nozzle in position A can affectthe flow of fuel and shut off the fuelpump nozzle before the fuel tank is full.
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5.Operate the fuel pump nozzle withinthe area shown.
6.When you finish refueling slightly raisethe fuel pump nozzle and slowlyremove it.
7.Fully close the fuel filler door.
Do not attempt to start the engine if youhave filled the fuel tank with incorrect fuel.Incorrect fuel use could cause damage notcovered by the vehicle Warranty. Have yourvehicle immediately checked.
Refueling System Warning (If Equipped)
If the fuel tank filler valve does not fullyclose, a message could appear in theinformation display.
Message
Check Fuel Fill Inlet
If the message appears, do the following:
1.Stop your vehicle as soon as it is safeto do so and switch the engine off.
2.Shift into park (P) or neutral (N).
3.Apply the parking brake.
4.Fully open the fuel filler door.
5.Check the fuel tank filler valve for anydebris that may be restricting itsmovement.
6.Remove any debris from the fuel tankfiller valve.
7.Fully insert a fuel pump nozzle or thefuel filler funnel provided with yourvehicle into the fuel filler pipe. SeeFuel Filler Funnel Location (page153). This action should dislodge anydebris that may be preventing the fueltank filler valve from fully closing.
8.Remove the fuel pump nozzle or fuelfiller funnel from the fuel filler pipe.
9.Fully close the fuel filler door.
Note:The message may not immediatelyreset. If the message continues to appearand a warning lamp illuminates, have yourvehicle checked as soon as possible.
FUEL CONSUMPTION
Advertised Capacity
The advertised capacity is the maximumamount of fuel that you can add to the fueltank after running out of fuel. Included inthe advertised capacity is an emptyreserve. The empty reserve is anunspecified amount of fuel that remainsin the fuel tank when the fuel gaugeindicates empty.
Note:The amount of fuel in the emptyreserve varies and should not be relied uponto increase driving range.
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Filling the Fuel Tank
For consistent results when refueling:
•Switch the ignition off before fueling,an inaccurate reading results if youleave the engine running.
•Use the same fill rate,low-medium-high, each time you fillthe tank.
•Allow no more than one automaticshut-off when refueling.
Results are most accurate when the fillingmethod is consistent.
Calculating Fuel Economy
Your vehicle calculates fuel economyfigures through the trip computer averagefuel function. See Information Displays(page 98).
The first 1,000 mi (1,600 km) of driving isthe break-in period of the engine. Thesystem obtains a more accuratemeasurement after 2,000–3,000 mi(3,200–4,800 km).
Keep a record for at least one month andrecord the type of driving, for example cityor highway. This provides an accurateestimate of your vehicle’s fuel economyunder current driving conditions. Keepingrecords during summer and winter showshow temperature impacts fuel economy.
Conditions Influencing Fuel Efficiency
See Driving Economically (page 230).
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EMISSION LAW
WARNING: Do not remove or alterthe original equipment floor covering orinsulation between it and the metal floorof the vehicle. The floor covering andinsulation protect occupants of thevehicle from the engine and exhaustsystem heat and noise. On vehicles withno original equipment floor coveringinsulation, do not carry passengers in amanner that permits prolonged skincontact with the metal floor. Failure tofollow these instructions may result infire or personal injury.
U.S. federal laws and certain state lawsprohibit removing or rendering inoperativeemission control system components.Similar federal or provincial laws mayapply in Canada. We do not approve of anyvehicle modification without firstdetermining applicable laws.
Tampering with emissionscontrol systems includingrelated sensors can result inreduced engine power and the illuminationof the service engine soon light.
Tampering With a Noise ControlSystem
Federal laws prohibit the following acts:
•Removal or rendering inoperative byany person other than for purposes ofmaintenance.
•Repair or replacement of any device orelement of the design incorporated intoa new vehicle for the purpose of noisecontrol prior to its sale or delivery tothe ultimate purchaser or while it is inuse.
•The use of the vehicle after any personremoves or renders inoperative anydevice or element of the design.
The U.S. Environmental Protection Agencymay presume to constitute tampering asfollows:
•Removal of hood blanket, fender apronabsorbers, fender apron barriers,underbody noise shields or acousticallyabsorptive material.
•Tampering or rendering inoperative theengine speed governor, to allow enginespeed to exceed manufacturerspecifications.
If the engine does not start, runs rough,experiences a decrease in engineperformance, experiences excess fuelconsumption or produces excessiveexhaust smoke, check for the following:
•A plugged or disconnected air inletsystem hose.
•A plugged engine air filter element.
•A clogged fuel filter.
•Contaminated fuel.
•Air in the fuel system, due to looseconnections.
•Fuel system leaks, due to looseconnections.
•An open or pinched sensor hose.
•Incorrect engine oil level.
•Incorrect fuel for climatic conditions.
•Incorrect engine oil viscosity forclimactic conditions.
Note:Some vehicles have a lifetime fuelfilter that is integrated with the fuel tank.Regular maintenance or replacement is notneeded.
Note:If these checks do not help youcorrect the concern, see your authorizeddealer as soon as possible.
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CATALYTIC CONVERTER
WARNING: Do not park, idle ordrive your vehicle on dry grass or otherdry ground cover. The emission systemheats up the engine compartment andexhaust system, creating the risk of fire.
WARNING: The normal operatingtemperature of the exhaust system isvery high. Never work around or attemptto repair any part of the exhaust systemuntil it has cooled. Use special care whenworking around the catalytic converter.The catalytic converter heats up to a veryhigh temperature after only a shortperiod of engine operation and stays hotafter the engine is switched off.
WARNING: Exhaust leaks mayresult in entry of harmful and potentiallylethal fumes into the passengercompartment. If you smell exhaustfumes inside your vehicle, have yourvehicle inspected immediately. Do notdrive if you smell exhaust fumes.
Your vehicle has various emission controlcomponents and a catalytic converter thatenables it to comply with applicableexhaust emission standards.
To make sure that the catalytic converterand other emission control componentscontinue to work properly:
•Do not crank the engine for more than10 seconds at a time.
•Do not run the engine with a spark pluglead disconnected.
•Do not push-start or tow-start yourvehicle. Use booster cables. See JumpStarting the Vehicle (page 235).
•Use only the specified fuel listed.
•Do not switch the ignition off when yourvehicle is moving.
•Avoid running out of fuel.
•Have the items listed in scheduledmaintenance information performedaccording to the specified schedule.
Note:Resulting component damage maynot be covered by the vehicle Warranty.
The scheduled maintenance items listedin scheduled maintenance information areessential to the life and performance ofyour vehicle and to its emissions system.
If you use anything other than Ford,Motorcraft or Ford-authorized parts formaintenance replacements or for serviceof components affecting emission control,such non-Ford parts should be equivalentto genuine Ford Motor Company parts inperformance and durability.
Illumination of the service engine soonindicator, charging system warning light orthe temperature warning light, fluid leaks,strange odors, smoke or loss of enginepower could indicate that the emissioncontrol system is not working properly.
An improperly operating or damagedexhaust system may allow exhaust toenter the vehicle. Have a damaged orimproperly operating exhaust systeminspected and repaired immediately.
Do not make any unauthorized changes toyour vehicle or engine. By law, vehicleowners and anyone who manufactures,repairs, services, sells, leases, tradesvehicles, or supervises a fleet of vehiclesare not permitted to intentionally removean emission control device or prevent itfrom working. Information about yourvehicle’s emission system is on the VehicleEmission Control Information Decallocated on or near the engine. This decalalso lists engine displacement.
Please consult your warranty informationfor complete details.
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2023 Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-11-2022, enUSA, Edition date: 202209, First-PrintingEngine Emission Control

On-Board Diagnostics (OBD-II)
Your vehicle has a computer known as theon-board diagnostics system (OBD-II) thatmonitors the engine’s emission controlsystem. The system protects theenvironment by making sure that yourvehicle continues to meet governmentemission standards. The OBD-II systemalso assists a service technician in properlyservicing your vehicle.
When the service engine soonindicator illuminates, the OBD-IIsystem has detected amalfunction. Temporary malfunctions maycause the service engine soon indicator toilluminate. Examples are:
1.Your vehicle has run out of fuel—theengine may misfire or run poorly.
2.Poor fuel quality or water in thefuel—the engine may misfire or runpoorly.
3.The fuel fill inlet may not have closedproperly. See Refueling (page 155).
4.Driving through deep water—theelectrical system may be wet.
You can correct these temporarymalfunctions by filling the fuel tank withgood quality fuel, properly closing the fuelfill inlet or letting the electrical system dryout. After three driving cycles without theseor any other temporary malfunctionspresent, the service engine soon indicatorshould stay off the next time you start theengine. A driving cycle consists of a coldengine startup followed by mixed city andhighway driving. No additional vehicleservice is required.
If the service engine soon indicator remainson, have your vehicle serviced at the firstavailable opportunity. Although somemalfunctions detected by the OBD-II maynot have symptoms that are apparent,continued driving with the service enginesoon indicator on can result in increasedemissions, lower fuel economy, reducedengine and transmission smoothness andlead to more costly repairs.
Readiness for Inspection andMaintenance (I/M) Testing
Some state and provincial and localgovernments may haveInspection/Maintenance (I/M) programsto inspect the emission control equipmenton your vehicle. Failure to pass thisinspection could prevent you from gettinga vehicle registration.
If the service engine soonindicator is on or the bulb doesnot work, your vehicle may needservice. See On-Board Diagnostics.
Your vehicle may not pass the I/M test ifthe service engine soon indicator is on ornot working properly (bulb is burned out),or if the OBD-II system has determinedthat some of the emission control systemshave not been properly checked. In thiscase, the vehicle is not ready for I/Mtesting.
If the vehicle’s engine or transmission hasjust been serviced, or the battery hasrecently run down or been replaced, theOBD-II system may indicate that thevehicle is not ready for I/M testing. Todetermine if the vehicle is ready for I/Mtesting, turn the ignition key to the onposition for 15 seconds without crankingthe engine. If the service engine soonindicator blinks eight times, it means thatthe vehicle is not ready for I/M testing; ifthe service engine soon indicator stays onsolid, it means that your vehicle is readyfor I/M testing.
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MANUAL TRANSMISSION
Using the Clutch
Note:Failure to fully press the clutch pedalto the floor may cause increased shiftefforts, prematurely wear transmissioncomponents or damage the transmission.
Note: Do not drive with your foot restingon the clutch pedal or use the clutch pedalto hold your vehicle at a standstill whilewaiting on a hill. These actions reduces thelife of the clutch and could nullify a clutchwarranty claim.
Note:The engine may not start unless theintelligent access key is inside your vehicle.
Manual transmission vehicles have astarter interlock that prevents cranking theengine unless you fully press the clutchpedal.
To start the vehicle:
1.Make sure the parking brake is fully set.
2.Press the clutch pedal to the floor, thenput the gearshift lever in the neutral(N) position.
3.Start the engine.
4.Press the brake pedal and move thegearshift lever to the desired gear; first(1) or reverse (R).
5.Release the parking brake, then slowlyrelease the clutch pedal while slowlypressing on the accelerator.
During each shift, fully press the clutchpedal to the floor. Make sure to properlyposition the floor mat so it does notinterfere with the full extension of theclutch pedal.
Recommended Shift Speeds
Note:Do not downshift into first (1) whenyour vehicle is moving faster than 15 mph(24 km/h). This damages the clutch.
2.3L
Upshifts When Accelerating - Recom-mended for Best Fuel Economy
Shift from:
15 mph (24 km/h)1 - 2
24 mph (39 km/h)2 - 3
35 mph (56 km/h)3 - 4
41 mph (66 km/h)4 - 5
50 mph (80 km/h)5 - 6
5.0L
Upshifts When Accelerating - Recom-mended for Best Fuel Economy
Shift from:
14 mph (23 km/h)1 - 2
25 mph (40 km/h)2 - 3
35 mph (56 km/h)3 - 4
41 mph (66 km/h)4 - 5
48 mph (77 km/h)5 - 6
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Note:You may not be able to shift out ofpark (P) unless the intelligent access key isinside your vehicle.
Automatic Transmission PositionIndicators
The instrument cluster displays the currentposition.
Note:The position could illuminate on thetransmission selector.
Understanding the Positions ofYour Automatic Transmission
Putting your vehicle in gear:
1.Fully press down on the brake pedal.
2.Press and hold the button on the topof the gearshift lever.
3.Move the gearshift lever into thedesired gear.
4.Release the button and yourtransmission remains in the selectedgear.
Transmission Selector Positions
The instrument cluster displays the currentgear.
Park (P)
This position locks the transmission andprevents the rear wheels from turning.Come to a complete stop before puttingyour vehicle into and out of park (P).
Reverse (R)
With the selector in reverse (R), yourvehicle moves backward. Always come toa complete stop before shifting into andout of reverse (R).
Neutral (N)
With the selector in neutral (N), you canstart your vehicle and it is free to roll. Holdthe brake pedal down when in this position.
Drive (D)
Drive (D) is the normal driving position forthe best fuel economy. The overdrivefunction allows automatic upshifts anddownshifts through all gears.
Sport (S)
Putting your vehicle in sport (S):
•Provides additional engine braking andextends lower gear operation toenhance performance for uphill climbs,hilly terrain or mountainous areas. Thisincreases engine RPM during enginebraking.
•Provides additional lower gearoperation through the automatictransmission shift strategy.
•Provides gear upshifts and downshiftsmore quickly at higher engine speeds.
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When Towing a Trailer
•Do not drive faster than 70 mph(113 km/h) during the first 500 mi(800 km).
•Do not make full-throttle starts.
•Check your hitch, electrical connectionsand trailer wheel lug nuts thoroughlyafter you have traveled 50 mi (80 km).
•When stopped in congested or heavytraffic during hot weather, place thetransmission in park (P) or neutral (N)to aid engine and transmission coolingand to help air conditioningperformance.
•Switch off the speed control withheavy loads or in hilly terrain. Thespeed control may turn offautomatically when you are towing onlong, steep grades.
•Shift to a lower gear when driving downa long or steep hill. Do not apply thebrakes continuously, as they mayoverheat and become less effective.
•If your transmission is equipped with aGrade Assist or Tow/Haul feature, usethis feature when towing. This providesengine braking and helps eliminateexcessive transmission shifting foroptimum fuel economy andtransmission cooling.
•Allow more distance for stopping witha trailer attached. Anticipate stops andbrake gradually.
•Avoid parking on a slope. However, ifyou must park on a slope:
1.Turn the steering wheel to point yourvehicle tires away from traffic flow.
2.Set your vehicle parking brake.
3.Place the automatic transmission inpark (P) or manual transmission in alow gear.
4.Place wheel chocks in front and backof the trailer wheels. Chocks are notincluded with your vehicle.
Launching or Retrieving a Boat orPersonal Watercraft (PWC)
Note:Disconnect the wiring to the trailerbefore backing the trailer into the water.
Note:Reconnect the wiring to the trailerafter removing the trailer from the water.
When backing down a ramp during boatlaunching or retrieval:
•Do not allow the static water level torise above the bottom edge of the rearbumper.
•Do not allow waves to break higherthan 6 in (15 cm) above the bottomedge of the rear bumper.
Exceeding these limits may allow water toenter vehicle components:
•Causing internal damage to thecomponents.
•Affecting driveability, emissions, andreliability.
Any time the rear axle submerges in water,replace the rear axle lubricant. Water maycontaminate the rear axle lubricant, whichis not a normal maintenance inspectionitem unless there is a possibility of a leakor other axle repair is required.
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REDUCED ENGINE
PERFORMANCE
WARNING: If you continue to driveyour vehicle when the engine isoverheating, the engine could stopwithout warning. Failure to follow thisinstruction could result in the loss ofcontrol of your vehicle.
If the engine coolant temperature gaugeneedle moves to the upper limit position,the engine is overheating. See Gauges(page 90).
You must only drive your vehicle for a shortdistance if the engine overheats. Thedistance you can travel depends onambient temperature, vehicle load andterrain. The engine continues to operatewith limited power for a short period oftime.
If the engine temperature continues to rise,the fuel supply to the engine reduces. Theair conditioning switches off and the enginecooling fan operates continually.
1.Gradually reduce your speed and stopyour vehicle as soon as it is safe to doso.
2.Immediately switch the engine off toprevent severe engine damage.
3.Wait for the engine to cool down.
4.Check the coolant level. See EngineCoolant Check (page 265).
5.Have your vehicle checked as soon aspossible.
Reduced Vehicle Top Speed
Your vehicle's ability to reach and maintaintop speed is partially dependent uponambient temperature. Under certainenvironmental conditions, your vehicle'stop speed may be reduced to protectpowertrain components.
COLD WEATHER
PRECAUTIONS
The functional operation of somecomponents and systems can be affectedat temperatures below approximately-13°F (-25°C).
BREAKING-IN
Your vehicle requires a break-in period. Forthe first 1,000 mi (1,600 km), avoid drivingat high speeds, heavy braking, aggressiveshifting or using your vehicle to tow. Duringthis time, your vehicle may exhibit someunusual driving characteristics.
Ground Clearance
Since ground clearance is reduced, usecaution when approaching curbs or curbstops from the front and rear as vehicledamage may occur. Additionally, whencrossing speed bumps or driveway curbs,you should approach at a 45 degree angleto reduce the risk of vehicle damage.
DRIVING ECONOMICALLY
The following helps to improve fuelconsumption:
•Drive smoothly, accelerate gently andanticipate the road ahead to avoidheavy braking.
•Regularly check your tire pressures andmake sure that they are inflated to thecorrect pressure.
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2023 Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-11-2022, enUSA, Edition date: 202209, First-PrintingDriving Hints