I own a 2000 disco and now that winter is on its way i need to change my coolant to water ratio. My question is, is it safe to use one of the coolants that mix with all types of coolant or should i stay with the orange O.A.Ts rated coolant. I just purchased disco 4 moths ago just want to know which way to go.

 

you will be fine either way, coolants have come a long way, your prefrance. I would mix it with what ever is in there if it were me.

 

LRNA has just recently come out with an updated fluid chart. LRNA, AKA Ford, does not mention coolants that can be mixed with all types. It does say that many vehicles can be converted to OAT's with a system flush.
D2, Stay with OAT's . The jury is still out regarding mix all coolants.