One thing that has me wondering lately, i am looking at possibly buying a 1991 Ford Escort RS 2000 ( European 150hp version )
Looking at fluid recommendations for it i noticed :
The recommended coolant is Ford ESD-M97B4-A
A quick search shows most of the coolants meeting this spec are Blue and claim to meet either VW G11 or G48, or both at the same time.
However, G11 is supposed to be a plain IAT containing Silicate, Borate, Benzoate and some form of Azole.
G48 on the other hand is a Silicate HOAT with no borate ( or benzoate? )
I am confused about how these coolants can be considered interchangeable or meet both specs at the same time?
Looking at fluid recommendations for it i noticed :
The recommended coolant is Ford ESD-M97B4-A
A quick search shows most of the coolants meeting this spec are Blue and claim to meet either VW G11 or G48, or both at the same time.
However, G11 is supposed to be a plain IAT containing Silicate, Borate, Benzoate and some form of Azole.
G48 on the other hand is a Silicate HOAT with no borate ( or benzoate? )
I am confused about how these coolants can be considered interchangeable or meet both specs at the same time?