@all and @ brownrose78
The coolant has been discussed in details before, so kindly use the search option.
As far as the choice of coolant is concerned, pple are right in saying that the orange coolant is a very long life coolant, however it also depends on the engine.
As an example for the Honda Engine the orange one is not recommended, because it can damage the water tight seals, therefore they recommend the Genuine Honda Coolant type-2 which is specifically designed for that engine.
So @ brownrose78 you have to be careful before choosing the coolant.