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The 2003 Ford Ranger Owner Guide only shows ( 1 ) type of engine coolant ( YELLOW color , meeting Ford specification WSS-M97B51-A1 ) * but it also shows to use the type of engine coolant your vehicle was originally equipped with
Green
The spark plug number that is in my 2003 Ford Ranger XLT is: AGSF34FP - Motorcraft.
For a 2000 Ford Ranger : All the different engines came from the factory with a 50 / 50 mix of distilled water and GREEN colored antifreeze ( meeting Ford specification ESE-M97B44-A ) * 2.5 / 3.0 FFV / 4.0
green , the Owner Guide shows not to use orange
Motorcraft Premium Gold Coolant- dealer only item
The green color universal antifreeze mixed 50 / 50 with preferably distilled water ( in colder climates do not exceed 60 % antifreeze )
any type of anti-freeze will work ,just mix it half and half with water
Ford Gold or Universal Gold Antifreeze
its regular green ford didnt switch to GO5 until 2002-2003
Any brand of antifreeze can be used in a 2001 Ford Taurus such as Prestone. The antifreeze can be 50 50 antifreeze.
According to the 2003 Ford Expedition Owner Guide it came from the factory with : Motorcraft Premium Gold Engine Coolant ( yellow - colored ) Meeting Ford specification ( WSS-M97B51-A1 )