Knowing that I'm planning to do a coolant flush on my '02 Tiger, one of my riding buddies gifted me with a couple quarts of Honda brand pre-mixed coolant that is a good 6 - 8 years old. It is still in the original sealed bottle, but I'm just wondering - is there any reason it would lose any of its' properties over time? I'm thinking it should be fine - but I'm just wondering if anyone knows of any reason I shouldn't use the stuff? Thanks for any help! ---Jay
I googled this recently since I too have some old coolant. Here is quote from Havoline's website:
"The primary limiting factor in the shelf life of a coolant is silicate instability. Since silicate will eventually polymerize to silicate gel, all traditional coolants have a shelf life of about 18 months."
I saw other numbers that varied from 1-5 years from other manufacture's websites.
Goober; Thanks for sharing your research. Looks like I'll be buying some fresh stuff! ---J