Ford 2003 Ranger User Manual download pdf (Page 211)

Choosing the right fuel

Use only UNLEADED FUEL. The use of leaded fuel is prohibited by law

and could damage your vehicle.

If your vehicle is a flexible fuel vehicle (FFV), use only UNLEADED

FUEL and (E85) ETHANOL. The use of leaded fuel is prohibited by law

and could damage your vehicle.

Do not use fuel containing methanol. It can damage critical fuel system

components.

Your vehicle was not designed to use fuel or fuel additives with metallic

compounds, including manganese-based compounds containing MMT.

Repairs to correct the effects of using a fuel for which your vehicle was

not designed may not be covered by your warranty.

Octane recommendations

Do not be concerned if your engine

sometimes knocks lightly. However,

if it knocks heavily under most

driving conditions while you are

using fuel with the recommended

octane rating, see your dealer or a qualified service technician to prevent

any engine damage.

Unleaded Gasoline engines

Your vehicle is designed to use “Regular” unleaded gasoline with an

(R+M)/2 octane rating of 87. We do not recommend the use of gasolines

labeled as “Regular” that are sold with octane ratings of 86 or lower in

high altitude areas.

FFV engine (if equipped)

Your vehicle is designed to use (E85) Fuel Ethanol, “Regular” unleaded

gasoline or any percentage of the two fuels combined.

U.S. government regulations require fuel ethanol dispensing

pumps to have a small, square, orange and black label with the

common abbreviation or the appropriate percentage for that

region. Use of other fuels such as Fuel Methanol may cause

powertrain damage, a loss of vehicle performance, and your

warranty may be invalidated.

(R+M)/2 METHOD

Maintenance and Specifications

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Ford 2003 Ranger User Manual Page 211