Join Date: Aug 2009
Location: Washington, the state
There are several different chemistries of corrosion inhibitors, all in ethylene glycol base. Different chemistries react differently with the combination of various metals and the materials in the gaskets in different engines.
GM's infamous Dex-Cool is organic acid technology (OAT)...the organic acid used is 2-EHA which can soften certain gaskets. Ford, Chrysler, and Mercedes use hybrid organic acid technology (H-OAT) called G-05. Some Japanese engines require a phoshated organic acid (P-OAT) coolant, which is hard to find as an aftermarket product. Zerex makes an "Asian" engine aftermarket coolant, but nobody stocks it. The different engine makers require different (or zero levels) of phosphates, or nitrites, or silicates. The all-makes/all-models antifreeze may be an OAT that does not use 2-EHA, but anyone planning on keeping a vehicle for many years is smart to use the chemistry the manufacturer recommends (except GM & Dex-Cool).
I'll probably end up using some Toyota red antifreeze (cheap and available at any Toyota dealer) mixed with distilled water in my V-Strom.
Last edited by PTRider; 09-10-2009 at 02:46 PM.