So if you stock Toyota Red & Pink you will probably cover all Toyotas and Hondas. I don't know the exact makeup of Honda coolants, but I do know Honda hates 2-EHA (DexCool) and all japanese automakers hate silicates, so prob the newer Honda coolant is like Toyota Pink: a HOAT made of sebacates and phosphates. ![]() It's absolutely true that all OATs and HOATs will corrode the lead solder in brass/copper/lead radiators and heater cores, and should therefore never be used in our trucks.Īs far as stocking coolant in your shop, you probably will want to also carry a HOAT for the newer vehicles with aluminum radiators and heater cores. Most of the HOATs use sebacates, while most or all OATs use 2-EHA, but what makes a HOAT a HOAT is the presence of silicates or phosphates together with the organic acid. So, I'm a happy camper, Toyota red is all I need to stock and its not only less expensive, but it still comes in full strength which I prefer when servicing the cooling system!!!Ĭlick to expand.The author of the article is wrong about Toyota Pink being an OAT - because it has organic acids AND inorganic inhibitors (phosphates), it is a HOAT - hybrid organic acid technology. So, now that thats cleared up, my conclusion is that the pink and blue OATs are not suitable for our trucks with copper/brass/lead radiators and heater cores.Īnd the toyota Red is safe to use for our trucks (obviously) as well as other Japanese engines such as Honda, even if they have had the radiator replaced with a non aluminum one. What kind of threw me for a loop to begin with is the article mistakenly calling the honda extended life "deep green" instead of blue! See above in the comparison of toyota pink and honda "deep green" :headbang: Tended-life Japanese coolants use phosphates for fast protection (no sili-Ĭates) and a single organic acid (sebacate) and other inhibitors. Toyota Pink andHonda Deep Green:facepalm: Extended Life. Due to a similarity in color, it’s often mistaken for Dex-Ĭool, particularly in the Pontiac Vibe, a Toyota-engineered product. A conventional Japanese coolant with phosphates but,Īgain, no silicates. Life formula, the intervals go up to 5/100. If it’s a conventionalĬoolant, the recommended life span is typically 2/30. Hibitors that include phosphates (no silicates). "Japanese Green.Usually a deeper green than American green, with in. ![]() ![]() Toyota Red and the old Honda deep green are both Inorganic (IAT) conventional coolants using bunches of phosphates as their main inorganic inhibitor.Ĭast-iron issue, it apparently didn’t con. Ok, after reading it again, I think I understand.:chug:īoth Toyota Pink and Honde Blue are OAT coolants (like dexcool) EXCEPT they contain NO 2-EHA and instead use some inorganic phosphates and Sebacate. Thanks for the help, I just feel this is a under-discussed area of the never ending coolant confusion. ![]() (though it does compare toyota pink and honda green ironically) This article graciously posted by sb5walker goes on to explain things better than most articles, but I still saw no direct comparison between Toyota RED and Honda BLUE. The Honda type-2 listed ingredients are: Ethylene Glycol, Diethylene glycol, greater than 30ppm of a bittering agent The Toyota red ingredients listed are: Ethylene Glycol, Diethylene glycol, Water, Organic acid salt, Hydrated inorganic salt. I can search like crazy and find a ton of info on aftermarket and dexcool comparisons, but nothing on a Toyota-Honda comparison, at least nothing solid with articles, graphs, and the like to back it up. I am referring to Toyota RED long life (not pink), and Honda type-2 blue (since you cant buy green anymore) My garage consists of Toyota and Honda, and since both appear to call for inorganic phosphate based coolant, I was wondering if the two coolants are conveniently inter-changeable?
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