Is it critical to change coolant at 100K?

[RMcG]

Originally Posted by RMcG

Here is an Amazon link. ? Based on looking at the owner's manual, it looks like it is compatible.

Here below is detailed information on the composition:

Valvoline ZEREX DEX-COOL antifreeze coolant is a patented* carboxylate formulation with a service life of up to five years or 150,000 miles. It incorporates state-of-the-art organic acid technology in an ethylene glycol base for protection of all cooling system metals including aluminum. ZEREX DEX-COOL antifreeze coolant is approved by General Motors to the GM 6277M specification. ZEREX DEX-COOL antifreeze coolant contains no phosphates, silicates, borates, nitrates, amines and nitrites.

The owner's manual says to use Toyota Super Long Life Coolant or a similar high-quality ethylene glycol-based, nonsilicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid technology.

It looks like this Zerex formulation meets the requirements, but I am interested in what others think. One of my doubts is that this Zerex formulation is orange and what I have in the car is pink.

Thanks,

R.