Toyota red coolant, mixing ratio?

diggerdave May 28, 2019

  1. diggerdave

    diggerdave Well-Known Member

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    Hi all,

    I've only ever used the ready-mixed Toyota coolant before, but I can't find any going cheap.

    Does anyone know the mixing ratio offhand for the concentrate version? Is it 1:1? I.e. will 5l of concentrate give me 10l of antifreeze?

    Does it have to be distilled water that you mix with?
     
  2. Josh Tagg

    Josh Tagg Well-Known Member I am in uk

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    The merc red anti freeze mix is 60 40. As a rule around half and half and you won't be far wrong
     
  3. chapel gate

    chapel gate Well-Known Member Supporter Promoted Company I am in england

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    There are varying ratios for a scale of lower temperature protection. I just go 50/50. This is down to about -30 iirc.

    By the book you should use distilled water. I do. Plenty don't.
     
  4. silvercruiser

    silvercruiser Well-Known Member

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    I used 50/50 when i changed the colorado's Rad. I also used distilled water.
     
    chapel gate likes this.
  5. Chris

    Chris Super Moderator Supporter I am in europe

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    Distilled water in a 20 year old lorry engine. Happy with good old Derbyshire tap. If it's good enough for tea, it's good enough in an engine. Not everyone has as good water as we do here of course. But I wouldn't fuss over whether it has to be distilled, de mineralised or even unicorn tears. I wouldn't think it will kill the engine with scale and deposits.
    I got a 25l drum of AF from my local warehouse recently for about £36. Can't recall ever buying genuine Mr T for any of the Toyotas I've ever owned.
     
  6. Shayne

    Shayne Well-Known Member Guru

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    Ditto , theres nothing magical about it and water will do , though i do put roughtrax toyota red in mine simply for its anti corrosive properties while knowing i will never change it again unless some other circumstance forces me to .
     
  7. Towpack

    Towpack Well-Known Member Supporter I am in england

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    Halfords OAT 5 year antifreeze/coolant. Changed the first fill at just over 4 years and it was exactly the same colour as when it went in, not a hint of any sludge or deposits. Use it in the bikes too.
     
  8. diggerdave

    diggerdave Well-Known Member

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    Thanks all. I'll go with the Toyota stuff for its anti-corrosion additives I think.

    Must resist the urge to add milk and sugar to the mix.
     
    Gasmanjc likes this.
  9. chapel gate

    chapel gate Well-Known Member Supporter Promoted Company I am in england

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    The unimog manual states tap water.

    Edit; it states fresh water.
     
    Last edited: May 29, 2019
  10. Chris

    Chris Super Moderator Supporter I am in europe

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    For making tea?
     
  11. Shayne

    Shayne Well-Known Member Guru

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    My Me manual states clearly beer only but everyone ignores that page :violin:
     
  12. chapel gate

    chapel gate Well-Known Member Supporter Promoted Company I am in england

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    Yes.
    The tea bags can be added to the rad.
    Then fill your favourite mug from the drain off.
     
  13. Gary820

    Gary820 Well-Known Member I am in great_britain

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    I only got coolant from Toyota as it was £20 for 25 litres on a trade deal, still got a load left.
    Just gets tap water too, no different to what we do at work.
     
  14. uHu

    uHu Well-Known Member Supporter I am in norway

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    Problem with tap water is if it's hard, containing lotsa calcium, it will deposit scales at the hottest surfaces inside the engine. This results in insulation of the areas that need the cooling the most.
     
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