Organic acid technology antifreeze is the stuff recommended by LR, that is what the D2 left the factory with.
Cooling system capacity for a Td5 is: Refill 8, litres Fill from dry 13 litres.
 
I found the cheapest source of long-life antifreeze concentrate (orange stuff) was a Vauxhall main dealer. Much cheaper than halfrauds.
 

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