2015 FORD F SERIES MOTORHOME AND COMMERCIAL CHASSIS octane

FUEL QUALITY
Note:Use of any fuel other than thoserecommended may cause powertraindamage, a loss of vehicle performance, andrepairs may not be covered under warranty.
Choosing the Right Fuel
Use only UNLEADED gasoline orUNLEADED gasoline blended with amaximum of 15% ethanol in your gasolinevehicle. If your vehicle is a Flex Fuel Vehicle(FFV), it will have a yellow bezel placedover the fuel fill inlet.
Do not use:
•fuels containing more than 15%ethanol or E-85 fuel
•fuels containing methanol
•fuels containing metallic basedadditives, including manganese-basedcompounds
•fuels containing the octane boosteradditive, methylcyclopentadienylmanganese tricarbonyl (MMT)
•leaded-fuel (The use of leaded fuel isprohibited by law)
Note:Use of any fuel other than therecommended fuel can cause powertraindamage, impair the emission control systemor cause loss of vehicle performance. Anydamage to the vehicle that is caused by theuse of fuel not recommended will not becovered under warranty.
Octane Recommendations
Regular unleaded gasoline with a pump(R+M)/2 octane rating of 87 isrecommended. Some stations offer fuelsposted as Regular with an octane ratingbelow 87, particularly in high altitude areas.Fuels with octane levels below 87 are notrecommended.
Do not be concerned if your enginesometimes knocks lightly. However, if itknocks heavily under most drivingconditions while you are using fuel with therecommended octane rating, see yourauthorized dealer to prevent any enginedamage.
RUNNING OUT OF FUEL
Avoid running out of fuel because thissituation may have an adverse effect onpowertrain components.
If you have run out of fuel:
•You may need to cycle the ignition fromoff to on several times after refuelingto allow the fuel system to pump thefuel from the tank to the engine. Onrestarting, cranking time will take a fewseconds longer than normal. Withkeyless ignition, just start the engine.Crank time will be longer than usual.
•Normally, adding 1 gallon (3.8 liters) offuel is enough to restart the engine. Ifthe vehicle is out of fuel and on a steepgrade, more than 1 gallon (3.8 liters)may be required.
•The service engine soon indicator maycome on. For more information on theservice engine soon indicator, SeeWarning Lamps and Indicators(page 13).
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ENGINE SPECIFICATIONS
6.8L V10 engineEngine
415Cubic inches
Minimum 87 octaneRequired fuel
1-6-5-10-2-7-3-8-4-9Firing order
Coil on plugIgnition system
0.039-0.043 inch (1.00-1.10mm)Spark plug gap
9.2:1Compression ratio
Drivebelt Routing
Engines with A/C
Engines without A/C
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Engine Coolant Check..................................75Adding Engine Coolant.......................................75Recycled Engine Coolant...................................76Severe Climates....................................................76What you Should Know About Fail-SafeCooling.................................................................77Engine Oil Check.............................................74Adding Engine Oil.................................................74Resetting the Oil Life MonitoringSystem.................................................................74Engine Oil Dipstick.........................................74Engine Specifications..................................110Drivebelt Routing.................................................110Essential Towing Checks............................44Before Towing a Trailer......................................46Hitches.....................................................................44Launching or Retrieving a Boat or PersonalWatercraft (PWC)..........................................46Safety Chains.........................................................45Trailer Brakes.........................................................45Trailer Lamps.........................................................45When Towing a Trailer.......................................46Export Unique Options...................................7Extended Service Plan (ESP)...................119SERVICE PLANS (CANADA ONLY).............120SERVICE PLANS (U.S. Only)...........................119
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Ford Credit...........................................................5(U.S. Only).................................................................5Fuel and Refueling.........................................22Fuel Consumption.........................................25Calculating Fuel Economy................................25Filling the Tank......................................................25Fuel Filter...........................................................82Fuel Quality......................................................23Choosing the Right Fuel.....................................23Octane Recommendations..............................23Fuses....................................................................61Fuse Specification Chart..............................61Diode and Relay Module....................................67Passenger Compartment Fuse Panel..........68Power Distribution Box.......................................61
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Gauges.................................................................12Engine Coolant Temperature Gauge.............13Engine Oil Pressure Gauge.................................12Fuel Gauge...............................................................13Speedometer..........................................................12Transmission Fluid TemperatureGauge....................................................................12General Maintenance Information..........121Multi-point Inspection.......................................123Owner Checks and Services...........................122Protecting Your Investment.............................121Why Maintain Your Vehicle?............................121Why Maintain Your Vehicle at YourDealership?.......................................................121Getting Assistance Outside the U.S. andCanada...........................................................58Getting the Services You Need.................55Away From Home................................................55
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HandbrakeSee: Parking Brake...............................................34Hazard Warning Flashers............................52Hints on Driving With Anti-LockBrakes..............................................................33
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Ignition Switch................................................20In California (U.S. Only)...............................56Information Displays......................................16General Information.............................................16Information Messages...................................17Engine........................................................................18Maintenance...........................................................18Transmission...........................................................19Instrument Cluster..........................................12Instrument Lighting Dimmer......................10Introduction........................................................3
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