I don't know if red long life always had an OAT, but his makes it look like red and pink are probably the same formula. Where did you find the ingredient list? "Orangic Acid Salt(532-32-1)" means OAT and is probably the same sodium benzoate in pink super long life. To change the name, recommend twice the life, with half the concentration of coolant, would be a great flim flam. If they are the same, then, as said, Toyota has great scam going. Toyota Red Long Life ingredients from jug: Ethylene Glycol(107-21-1),Diethylene Glycol(111-46-6) Water() Orangic Acid Salt(532-32-1) Hydrated Inorganic Salt(). If you can find red at a dealer for a good price, it might be a very good coolant to use in a lot of different applications. So bottomline is I think Toyota red is really just the concentrated version of the pink. So Honda type 2, Toyota red and pink, etc are probably all very similar and compatible with most all Japanese vehicles and also non-Japanse vehicles. Also they don't make it readily available to the aftermarket. Most of the Japanese OE coolants are the same with few exceptions, and are thought to be supplied by the Japanese anti-freeze manufacture CCI. And red I think had the claim of 5year/60K miles. Pink does claim a longer life for the factory-fill, ~10years/100k miles but after changing ~5 years/60K miles. I think pink is also a HOAT and probably the same formula as red, phosphate and the OAT sodium benzoate. Anyway the dye color doesn't mean the formula is different. But it's only avaliable in premix, and maybe that's why it looks pink because it's diluted and not because it's really dyed much differently to distinguish it. I'm not sure when Toyota started using the pink. I think it was phosphated and contained an organic acid, sodium benzoate and/or sodium sebacate.
I think the Toyota red was an HOAT and probably one of the first.
I also replaced the red with American green after that. As an aside, it also had a downflow brass radiator that eventually leaked at the top header seem and I replaced the radiator.
My dad bought a brand new '88 Toyota pick up with the 22RE that had red coolant. I think red coolant was factory-filled in Toyotas since '87-'88'. There is two Toyota coolants available, "red" long life concentrate (I'll call it "red") and pink super long life (I'll call it pink).
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