Zerex DEX-COOL Antifreeze/Coolant, Concentrated Check Price This coolant from Zerex is of the orange ‘Dex-Cool’ variant – a type of organic coolant developed by General Motors in the mid 1990s.

Shell Rotella T Rotella ELC Antifreeze/Coolant Concentrate. Shop at Amazon. Popular Dex-Cool. ACDelco ACDelco 10-5027 Dex-Cool 50/50 Pre-Mix . Shop at Amazon. Popular for Toyotas.

By increasing the percentage of concentrate during winter, heat exchange properties of the antifreeze/coolant are compromised and can lead to engine component troubles in the summer.

Antifreeze is a concentrated liquid that is mixed with water to create what we call coolant. The pH of coolant changes when it's exposed to air, and increased acidity can diminish its ability to ...

But what about coolant, also called antifreeze in concentrated form? How long can it last and what happens if it doesn't get changed? Coolant is typically a 50/50 mix of water and ethylene glycol ...