Exact Antifreeze Brand

[ZR1Vette]

First, Peak Long Life lists several ingredients, including the NJTSRN QT1 which tech jargon for their "proprietary mystery" ingredient(s) that the manufacturer doesn't want to share with us as to the specifics. It is the same ingredients found in DexCool, which is under fire for engine damage (here is an example of one of many litigation's concerning this issue>> http://www.dexcoolsettlement.com/notice.pdf ).

Peak Long Life is listed as being compliant to GM 1825M (which is a performance standard not a chemical composition guideline), but at the same time does note "Contains no phosphates or silicates"

ASTM D-3306
This specification covers the requirements for ethylene glycol or propylene glycol base engine coolants used in automobiles or other light duty service cooling systems. When concentrates are used at 40 to 70 % concentration by volume in water, or when prediluted glycol base engine coolants (50 volume % minimum) are used without further dilution, they will function effectively to provide protection against freezing, boiling, and corrosion.

ASTM D-4340
This test method provides a means for selectively screening unused engine coolants and will readily distinguish those coolants that are unsuitable for use with aluminum cylinder head engines. However, satisfactory performance of a coolant in this test method does not ensure adequate long-term service performance.