Hi David,
I use a concentrated pink G12 Truck Coolant (1:1) in my 1996 1.8Zetec. G12 is upwards mixable with G12+ (yellow or pink/orange) G13 (purple) but NOT downwards with G11 (blue green).
Also look for your coolant to be FORD compliant.
There is a lot of fuss about coolants but as long as you do not mix up the green-blueish type with the pink-orange stuff (made for motors with aluminum parts) , you should have peace of mind.
Cheers,
Mich