Originally Posted By: Reddy45
Peak Global is good stuff. The only thing is it LACKS silicates, while some mfg like Ford call for silicates because they provide some cleaning action for the cooling system internals.
If your system needs silicates, but you use silicant-free coolant, do a yearly flush and fill.
(that's my logic, anyway)
Cleaning is not the purpose of silicates in antifreeze. OAT takes a while to build up a layer of protection on the inside of the cooling system. If there is some cavitation going on, it knocks the OAT layer off and it needs to build up again. Silicate builds up the protective layer much quicker and provides some level of protection until the OAT can do its job. Phosphate is even quicker and seems to be preferred by most Japanese automakers. European automakers don't like phosphate because they generally have hard water and phosphates don't agree with hard water. Silicates in large quantities create their own problems.
Peak Global is good stuff. The only thing is it LACKS silicates, while some mfg like Ford call for silicates because they provide some cleaning action for the cooling system internals.
If your system needs silicates, but you use silicant-free coolant, do a yearly flush and fill.
(that's my logic, anyway)
Cleaning is not the purpose of silicates in antifreeze. OAT takes a while to build up a layer of protection on the inside of the cooling system. If there is some cavitation going on, it knocks the OAT layer off and it needs to build up again. Silicate builds up the protective layer much quicker and provides some level of protection until the OAT can do its job. Phosphate is even quicker and seems to be preferred by most Japanese automakers. European automakers don't like phosphate because they generally have hard water and phosphates don't agree with hard water. Silicates in large quantities create their own problems.
