Thought I'd ask here and see what I get.
I did a coolant change 2 or 3 years ago and have 1/2 a bottle of premix left from it. I also have a concentrated bottle (non-premix) that has about 3/4 from a different source but still Prestone. Obviously since they aren't full, they have been opened but the caps have been on them and sitting around in a garage for 2 or 3 years.
Does the stuff expire ? I know that brake fluid does if the bottles are opened but I can't find any conclusive proof one way or another on different sites that it does or it doesn't expire.
The Prestone website only has reference to unopened bottles on the site.
Q: What is the shelf life of Prestone® Antifreeze/Coolant?
A: If the product is still in the original sealed container or has not been diluted with water then it has a shelf life of many years.
Anyone have a reliable source ?
I did a coolant change 2 or 3 years ago and have 1/2 a bottle of premix left from it. I also have a concentrated bottle (non-premix) that has about 3/4 from a different source but still Prestone. Obviously since they aren't full, they have been opened but the caps have been on them and sitting around in a garage for 2 or 3 years.
Does the stuff expire ? I know that brake fluid does if the bottles are opened but I can't find any conclusive proof one way or another on different sites that it does or it doesn't expire.
The Prestone website only has reference to unopened bottles on the site.
Q: What is the shelf life of Prestone® Antifreeze/Coolant?
A: If the product is still in the original sealed container or has not been diluted with water then it has a shelf life of many years.
Anyone have a reliable source ?