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Dexron iii12/8/2023 It was developed on the basis of the requirements set by GM and Ford groups. It ensures a flawless operation of an automatic gearbox, guarantees minimal wear, a lasting service life of transmissions and fuel economy. I would take the synth PSF.A universal all-season synthetic-based transmission fluid (ATF) for automatic gearboxes, hydraulic converters, hydraulic power steering systems, car hydraulic clutches and other hydraulic devices, including the ones operating under heavy-duty conditions in trucks and off-road vehicles. synth boutique PSF vs unlicensed conventional DexronIII. This is beyond what the threadstarter asked. So, I would recommend the full visc ATF, and a full synthetic upgrade when/if in budget. My Toyota's did not call for a DexronVI or LV ATF their automatic transmissions, power steering systems, or differentials. I would not blindly think that a licensed DexronVI does, or can be used everywhere blindly. I would wager that a PSF, from those boutique manufacturers, would also have similar compatibility. Luckily, Valvoline made it very mechanically(and not biologically) compatible for those that used it where it wasn't recommended. When looking at Valvoline Maxlife ATF, because of pricing over the years, became overhyped super popular, does it EVER MENTION manual transmissions, power steering systems, transfer cases, or differentials, on the website or datasheet? Think about how so many have been brainwashed and use it as steak sauce and wafflepancake syrup too. Did GM not come out with a new MT fluid for those manuals requiring DexronIII too, and specifically stated NOT to use DexronVI in those manual transmissions? So, backwards compatibility can NOT be assumed for any non-GM product, or even non traditional automatic transmissions, or Allisons that haven't been rebuilt with upgraded seals, or YOUR PSF, without the blender label/website or automaker specifically stating so. This brings in the universal/multi-spec/multivehicle non-licensed ATFs that some love, and some love to hate. Some brands will state suitable for, meets exceeds. Another good list of 'meets or exceeds', or listed suitable for 'dexronIII', by various brands, are the Allison TES 295/468/668/389. I don't care for the pathetic performance of conventional ATF. If I had a Toyota requiring DexronIII, I would use Mobil1 ATF, RedlineD4, or Amsoil ATL, and obviously and equivalent boutique competitor. Don't assume that the Dexron-VI can just blindly be used anywhere. And, I wouldn't use it in place of differentials, power steering, transfer cases, manual transmissions, or non GM automatic transmissions, without the bottler mentioning those automakers and components. I would not blindly grab a Dexron VI from the GM dealer and add it to ANY non-GM product. Thats akin to looking for 20 year old bottles of API SG oil at the podunk town autoparts because you don't want to use a newer API SP/GF6 oil. I don't use ANY conventional dex/merc, even from Toyota parts. DexronIII isn't licensed anymore so your are relying on bottler reputation. I don't blindly use the latest greatest without reading the bottle label and manufacturer datasheet. There are also unlicensed fluids that could have more 'compatibility' with multiple makes. There are good full visc synthetic ATF's that meet/exceed DexronIII.
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