![]() The transition in coolant technology is taking place unevenly in different geographies of the world, indicating the importance of the role played by economic standing, age of the vehicle parc, behavior of fluids end users, and maintenance practices followed in different country markets. Conventional green coolants, which are based on inorganic additive technology (IAT), are increasingly being phased out, while demand for organic and hybrid organic acid technology-based fluids is growing. The industry is increasingly moving toward cooling fluids tweaked with additives and inhibitors that offer better corrosion protection and longer service life. These engines function at higher temperatures and need to be supported by cooling fluids that can offer good heat removal and robust corrosion protection properties.Īutomotive coolant technology is continuously evolving to accommodate new requirements set by the automotive industry. Modern vehicles have engines that are downsized and have higher power density compared to conventional vehicles so that they are compact and can run faster. Based on that, I wouldn't recommend it for either application or any Asian vehicle.The automotive coolants market is experiencing changes, driven by shifts in automotive design technology, as well as the desire for longer fluid service life and better performance. Both contain 2eha so neither matches the Toyota or Honda AF PHOAT 'type' chemistry currently spec'd. If that's the case, then it will not be a true Asian PHOAT as currently defined/ spec'd by the Asian vehicle manufacturers.Īs an aside Prestone has also come out with two AFs, one labeled for Toyota (red/pink tint) and one labeled for Honda ( blue tint). Perhaps Ford/Motorcraft is now putting themselves in separate category calling it a "P-OAT" by adding 2eha as inhibitor and phosphate. To amend my previous statement, up till now PHOAT and POAT meant the same thing. If it is a CoreGuard, because of 2eha I'd call it a modified Dexclone. That said, while I've seen speculation connecting some data points, seen no definitive evidence of exactly what the new Motorcraft yellow is. The latter doesn't not 2eha as inhibitor. With the addition of information that the newest Motorcraft Yellow 'may be' Prestone CoreGuard, if it's called a P-OAT by FoMoCo and/or Motorcraft and it contains 2eha used in DexCool, then Ford Yellow is not the same as a true Asian PHOAT. I'm running it in both my Fords and it even has stopped a small leak it used to have when i was running IAT coolant on my Escort! They use 400-500ppm of Silicate and they are very stable and have not seen yet Silicate dropout in them, and they last 5 years, like your regular plain jane OAT coolants.Īnd the Silicates are known to still be the best corrosion inhibitor at protecting aluminium, and it also provides extra protection lead solder and even copper, although the primary corrosion inhibitor for Copper are Azoles. and i have personally not seen or heard of any problems with these coolants in regard to rubber gaskets or hoses. They contain no 2-eha and are compatible with all metals, Cast Iron, Aluminium, Copper, Brass, Magnesium, Lead Solder. They went from IAT, to a plain OAT in 1996, and in 2005 they essentially created the Si-OAT categery of coolant. G13 ( Same as G12++ and mixable, but replaces 10-20% of the Ethylene glycol with Glycerol, more eco-friendly ) G12++ ( 400-500ppm Silicate + OAT inhibitors ) G12+ - Same as G12, but mixable with G11 unlike G12. G11 - Blue, IAT coolant with Silicates and Borates ![]() I like VW's Si-OAT coolants ( G12++ / G13 ) ![]() So we have ordinary old green, special green, orange, gold, yellow, blue, and who know how many I missed. My other vehicle, a Subaru, also specifies "special" coolant, and that coolant changed a couple years later: from special green to special blue. "Just use our ‘universal' coolant" and you'll be fine. Local shops each have their own "universal" preference: Peak, Valvoline, Xerox (didn't find a Prestone fan), and thought the whole topic was hooey. The TSB says to drain / flush all, replace with Prestone Corguard. It leaves out earlier Transits (pre-2018 non-Connect) I have a 2015. Here is a Ford doc: https:/ / Main/ quickref/ coolantsEN.pdf. They have a TSB for gas Transits (maybe others): TSB 18-2172k Im curious because Ford went from gold to orange to latest yellow.all since 2011. This piano doc was a good start, but, needs updating / expansion: http:/ / Antifreeze_Coolant_Timeline.pdf I googled and they they might be the same. I thought there was a POAT, someone clarify if it is the same as PHOAT?
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