They could be a blend of IAT and OAT chemicals, and were therefore named ‘Hybrids’. These ‘Extended Life Coolants’ (ELC), were usually orange in colour and offered a five-year or 100,000-mile change interval. “Next came Organic Acid Technology (OAT) coolants, whose chemical make-up offered better protection for cooling systems, and extended the life of the coolant. With these types of coolants, you’d normally have to change them every two years, or every 60,000 miles. “Older coolants that used Inorganic Additive Technology (IAT) were usually blue or green in colour. As our expert, Bruce Ellis, explains: “In days gone by, the colour of coolant was determined by the type of chemicals used to prevent corrosion - meaning you could tell a lot about the type of coolant used by its colour. As such, great care should be taken when topping up your car’s cooling system. Unfortunately, it’s no longer possible to determine a specific type of coolant from its colour alone, as the shade has little bearing on the chemical make-up of the product. Vehicle fluids vary in colour from bright pink to reddish-brown, so if you ever need help identifying which is which, take a look at our car fluid finder chart.Īs for coolant/antifreeze, there are a couple of key differences as to why some products are one colour and others are another. Why is Coolant/Antifreeze Different Colours? Which Coolant/Antifreeze Should I Use in My Car?.What Do Coolant/Antifreeze Colours Mean?.Why is Coolant/Antifreeze Different Colours?.We also look at some of the advantages of using high-performance coolant/antifreeze, so you can make a more informed decision on the product that’s right for you. However, it’s important to make sure you’re putting the right fluid in your car, so here we’ll give you some insight into the differences. There are historical reasons why it comes in different colours, but these days it doesn’t necessarily tell you all that much. The colour of engine coolant isn’t there to make it look pretty. If so, you might be wondering which you should use if you need to top up? I wouldn't mix ZAF with G-05, same as I wouldn't mix latter with IAT Original Green.Have you ever wondered how pink, orange, blue and green engine coolants differ from each other? Perhaps you’ve bought a car, checked the coolant/antifreeze reservoir for the first time and noticed it’s different from your last car. Readily available as concentrate, and reasonably priced. 'Apparently' silicates used in "oldest" AF doesn't mean much in many/most modern day vehicles.īack to topic, OP vehicle specs G-05 that would be my first choice. Silicates are not present in Asian P(H)OAT, Chrysler/Mopar OAT or any Dexcool/Dexclones, all OAT based. Silicates used and ethylene glycol used doesn't change that 'for me'. G-05 is organic acid based, Original Green is Inorganic based, not the same or for me even similar and I would not mix the two. 'Could' be low'er' silicate than say IAT 25 years ago, however doesn't help recommended service interval.Īpparently set off by the observation of personal non agreement that G05 the same or close to IAT original Green. Otoh as example/evidence, AZ conventional green still recommends 2 year/24k mile interval, same any older IAT original Green. Zerex is one that does advertises low silicate formula (patented according to them) and backs it up with a 5yr.100k mi. Since broached though, I've seen no evidence that "ALL" IAT original/conventional Green now low silicate as stated. It adds little and IAT is also off topic. Unsure of the reason for quote with history of silicates, G05, or extraneous Euro AF.
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