The type of coolant to use on a Ford 7.3 diesel is Motorcraft Premium Gold Engine Coolant. Motorcraft Gold provides optimal protection for the engine.
The answer is a definite no. Ford specifically states in their manulas and maintenance guides that Motorcraft Premium Gold coolant is not to be mixed with any other type of coolant, including their own Premium Orange and Premium Extended Life Green coolants. Dex-Cool and other "Universal" orange and green coolants are not to be mixed either, as these do not contain the specified additives Ford requires for continued cooling, anti-corrosion, and seal lubricating capabilities.
Motorcraft Premium Gold Engine Coolant (yellow coolant)
Motorcraft Premium Engine Coolant ( green color ) or Motorcraft Premium Gold Engine Coolant ( yellow color ) Use the color that came in your vehicle or is in it now
You can use Motorcraft Premium Gold Coolant in your 2003 Cobra SVT. You can also use the green version of this coolant.
You can use standard GREEN coolant in this system.DO NOT use orange or DEX COOL coolant.It will not mix with your current coolant.
Motorcraft Premium Gold Coolant- dealer only item
According to the Owner Guide , from the factory it came with either : Motorcraft Premium Engine Coolant ( green - color ) Ford specification ESE-M97B44-A or Motorcraft Premium Gold Engine Coolant ( yellow - color ) Ford specification WSS-M97B51-A1 . Check the engine coolant reservoir . It is a 50 / 50 mix of coolant and distilled water from the factory
Motorcraft Premium Gold Engine coolant (yellow colored) or similar but must be yellow
The Owner Guide shows Motorcraft Premium Gold Engine Coolant ( yellow-colored ) Ford specification ( WSS-M97B51-A1 ) But also shows to add the coolant that was originally in your vehicle
I was looking at the 2002 Ford F-150 Owner Guide and it ORIGINALLY came with either the : Motorcraft Premium engine coolant ( green - colored ) meeting Ford specification ( ESE - M97B44 - A ) or Motorcraft Premium Gold engine coolant ( yellow - colored ) meeting Ford specification ( WSS - M97B51 - A1 ) What color is in your engine coolant reservoir ?
According to the 2007 Ford Freestyle Owner Guide it came from the factory with Motorcraft Premium Gold Engine Coolant ( yellow color ) or Use an antifreeze that is the equivalent ( meeting Ford specification WSS-M97B51-A1 ) * mixed 50 / 50 with distilled water *