Thanks for the response.

Isn't a premix of coolant & water advised for top-up? I have read on multiple websites how it is always advisable to add a mixture of coolant & water. What do you make of that, as per your experience?

Also, technically speaking, could you clarify this as I am unable to get a proper answer from anywhere :-

Case A : You match the flow-rate of the two liquids so that both liquids flow through a Static Mixer at the same time. For eg. if you're adding 1 Ltr of coolant with 99 Ltrs of water, you control the flow-rate of water to match that of the coolant so they both flow together throughout the entire duration of the dosage, and finally mix and end up in the tank for a 1% concentration mixture.

Case B : You let the two liquids flow together at their own respective flowrates. The 1 Ltr of coolant passes through the mixer with water in 5 seconds and then the coolant pump shuts off, while the water flow continues till 99 Litres pass through. Would I still end up with a 1% concentration and will the mixing be homogeneous?