Hi there. I bought Volvo coolant 2 years ago for the flush and refill of my 2000 S70's radiator. Since the coolant was to be 50/50 (coolant/water), I have about half a bottle of unused, 2 year old coolant left (capped, never diluted, still in the original bottle).
Can I use this 2 year old coolant for my upcoming flush and refill without worry about a decline in its performance (tolerance to cold)?
If I have less than 1/2 a bottle and need additional coolant, can I combine this older coolant with some new Volvo coolant (that I will buy now)?
Thanks for your assistance.
Lara's Uncle
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