This excel sheet gives a standard shelf-life period for a handful of common Motorcraft products.

https://www.motorcraft.com/content/dam/f...ence-chart.xlsx

I think it's interesting that it says the "Specialty Green" Mazda coolant of the 2010-2011 period says 60 months because that was only used in production vehicles for a short time because it was known to have a short life (https://www.youtube.com/watch?v=o1pz05j4uWE).

Otherwise, they're all generally 60 or 84 months, but we're not talking about mayonnaise here. It'd likely be near it's durable strength long after it's "sell by date."

My guess is that because the different technologies (IAT...OAT...P-OAT...H-OAT) all have a particular chemistry with things like silicates or phosphates being suspended within the mixture, after a certain point, there will be some separation or settling of the compounds, which will impact the products durability.

If the storage area where you had the cases was somewhat stable in terms of temperature and humidity, based upon the sealed state of the containers, you probably can go well past the 60 month recommendation Ford has for the Motorcraft stuff. I'm guessing Peak is similar in it's storage recommendations.