Quote:
Originally Posted by thennen
I mentioned earlier that I believe the red/green was to differentiate antifreezes without silicates versus those that had them. I may be wrong, but my experiences support that, as silicates are abrasive. Anyway, I think that color may not matter anymore. Perhaps someone else knows for certain?
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i did some reading this AM on different types of coolant because i am not well versed in them and one thing i quickly learned that color can be a good indicator of what you are using, you really should be paying attention to the type of coolant you are using:
Inorganic
Organic
Hybrid Organic
this was a great guide:
The Ultimate Coolant Color Guide | Toyota Parts Center Blog
Quote:
Originally Posted by T4R2014
You can use green in a 1999 safely. Does that mean you should?
No. Factory fill was red, and I don't think Toyota was trying to scam anyone by selling new cars with red coolant either. We have moved on to HOAT coolants that can last longer and offer better corrosion protection. Just don't mix tap water in it and say that it's fine because one website vs the rest of the internet says so.
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well does anyone know what the 99 manual says? my car didnt come with one. im assuming it says to use red toyota coolant, the link i posted above says its HOAT. im sure you can 'safely' use IAT coolant if you religiously change the coolant when you need to; but if its not the right stuff, why even bother?
it seems as if all coolant these days is already pre dilluted. so im not sure why people feel the need to put tap, distilled, or de-ionized water in their cooling system when the right, pre-dilluted, coolant is already available.
either way, happy i learned something today!