AHC Fluid Shelf Lifetime?

[TLCJC]

Anyone know the shelf life of unopened AHC Fluid?

My 2004 needs a refresh and this is 3 years old.

 

[94SRUNNER]

This is a good question. I've had a container siting on the shelf for 5 years...so a little less that @TLCJC

 

[TexLexican]

I’ve used older and there was no visual difference with brand new (color, smell, viscosity). Unless there’s a use by date, what is the difference between the same fluid siting on the shelf for 5 years and in the system?