The Toyota RAV4 Owner's Manual says that coolant used should be either Toyota Super Long Life Coolant, or "Similar high quality ethylene glycol-based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid technology." Chevron Dex-Cool coolant employs the same labeling and uses the word "carboxylate" in its technical data description, rather than "organic acid," which Toyota uses. Question is, are they actually the same. From an article by Reochem, Inc., Coolant Experts:
"OAT is an acronym for Organic Acid (Additive) Technology which describes the type of materials responsible for the corrosion protection offered by a coolant of this type. OATs are Long Life Coolants (LLC), based on minimally depleting Carboxylate Technology. This technology provides superior protection to all components of the cooling system including those exotic materials like aluminum and magnesium found in the modern day engine."
According to the article Toyota coolant and Chevron Dex-Cool would appear to be based upon the same technology. Perhaps a RAV4 owner who is a chemist could determine whether this is a correct or incorrect assumption.
Sorry that this displays with so much waste space - couldn't be compacted more, apparently du to forum formatting requirements.