More a question to Hector........If you buy Power Cool in 55 gallon drums, based on a guess I would say that would last 2 to 3 coolant changes. With a 2 year life, even if it is in the drum would it not be outdated? Oil I buy in the 55 gallon drum. Coolant I prefer to be fresh.
A service facility that goes through a drum quickly has a good reason to buy coolant that way.
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