Originally Posted by Bgallagher
Originally Posted by ITG
Old thread, but this is a top google hit for this topic.
I just looked at the data sheets on the Peak website and Peak LL lists 3% 2-eha, while Peak Global has the same ingredients EXCEPT that one, and mentions 2-EH free formulation.
I emailed Prestone last week and they replied that all of their long life products contain 2-EHA.
It's interesting that there are other theories (like air in the system) explaining gasket failure, but
if you believe that a plasticizer like 2-EHA could be to blame, Peak Global would seem to fit the bill.
Amsoil also told me their coolant is 2-EHA free (it's G-05 compatible)... it has the benefit of also
being non-toxic-based, but is fairly expensive and you probably have to order it from their website.
Firstly welcome to BITOG!
Regarding Peak and their gold jug, I switched an 05 Equinox to it after I had my headgasket and LIM replaced. Both known to have issues with dexcool due to the material of the gasket. I have had ZERO issues with my cooling system since the replacement and the exchange of coolant. I can attest it is some good stuff. Regardless of what you end up using, if it is different that what the vehicle had I would do a complete flush with distilled water prior to using anything else. Coolant can be finicky (sludge etc.) when it is mixed with others.
I have an 04 GTO and a 13 malibu. Changing out the dexcool in both. You still using Peak Global, and is that was you recommend? I was going to use Peak Long Life, but I see that it has the 2-EHA that dexcool has.