Graham/Big Col
No, no problem to overcome and my car is usually used an awful lot and regularly serviced, just engine now ready to be re filled after fitting TR6 radiator and was looking what is available.
I like the idea of the long service, alleged protection properties of the product and any better heat transfer is always good. The initial cost may be slightly higher and approx £21 5 litres so 2 bottles required giving enough for spare bottle in boot, bear in mind that the possibility of 10 years service against drain and change every 2 years for normal blue antifreeze at say, bluecol approx £18 5 litres obviously only need 1 bottle with dilution. However, you would need 4/5 bottles over the same period as the 4 life should be good for, so £42 against £72/90. In the long term better proposition.
Then, of course there is the environmental issue ie the disposal of all that bluecol.
I just think that if there are advances in coolant technology or indeed any servicing technology, that, not only reduce our running costs and offer the potential to enhance the condition of our cars engines be whatever they are, then this must be beneficial.
I have placed my order and will see how this works and will report back as and when.
Oh Graham not sure of your point re the water pump, I am using the standard TR6 water pump/pulley setup and a TR6 Rad, so flow rate should be as per manufacturers parameters.
Cheers Guys for the communications.
Gary