According to the 2005 Ford Mustang Owner Guide : The cooling system capacity is 13.6 quarts ( 12.9 liters ) So , a 50 / 50 mix of antifreeze and preferably distilled water would require : ( 6.8 quarts / 6.45 liters of antifreeze ) * Ford shows not to use less than 40 % antifreeze and not to exceed 60 % antifreeze in the cooling system mixture *
The 2005 Ford Mustang has single overhead cam (SOHC).
Motorcraft Premium Gold Engine Coolant (yellow coolant)
Dex-cool
Red, 5 year, HOAT type
Red, 5 year, HOAT type
any antifreeze will work but the 98 like all newer cars had enviro safe long life type. http://www.valvoline.com/pages/products/product_detail.asp?product=10
prestone 50/50
Red 5 year, it is a HOAT type.
2005 f250 needs the pink antifreeze if you use the green stuff you will gum up the engine and cause seriuos damage
Viscosity SAE 5W-20
Your best bet is to call the dealership for a recommendation.