Quote:
Originally Posted by pwd72s
Agreed...think I have an unopened one from Valvoline on my garage shelf. I wonder how long an unopened one is good for? Anyway, good heat rating on that brand..
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Probably forever, more or less. Just get a cheap tester online, (everyone should have one), and test the bottle when you open it. I would place $$ on it being fine. Nothing else happens inside a sealed bottle of hydraulic fluid, other than possibly moisture. Which I doubt. It doesn't turn into wine or olive oil.
