trini Posted October 16, 2019 Share Posted October 16, 2019 Have any one did a research on the different brands of anti freeze ? The chemical composition ? How effective They are ? The negative/positive effect they have on radiator tubes, the entire system ? There are many brands out and it would be nice if some one could get the manufacturers to divulge their formula. It is the consumer right to know, especially with the modern engines nowadays. Link to comment Share on other sites More sharing options...
Spinneyhill Posted October 16, 2019 Share Posted October 16, 2019 You might find many of them are made by the same company. Penrite, for example, source theirs from BASF. You might like to check SDSs to see what you can learn. No antifreeze will damage your engine. All the bottles I read say safe for all metals. They will not damage gaskets. Contemporary technology is Organic Acid Technology. That is designed to protect aluminium, zinc and magnesium, which are right at the top of the galvanic series. Our older engines don't have a lot of those metals, although the radiator solder might contain quantities of them? Link to comment Share on other sites More sharing options...
Bloo Posted October 16, 2019 Share Posted October 16, 2019 There is so much BS floating around about Ethylene Glycol antifreeze it can make you dizzy. It is a rabbit hole. You can read for hours, maybe days, and still not really know anything. I have been using DexCool and similar "phosphate free" modern formulas since the mid 1980s in all sorts of old cars and it has not caused me any trouble yet, though I get dire warnings via the Internet so often I have become numb to it. Maybe it will bite me eventually, I don't know. I'm not holding my breath. IMHO no matter what sort of Ethylene Glycol antifreeze you are using, the important thing is to change it every 2 years (at least), no matter what the bottle says. 1 Link to comment Share on other sites More sharing options...
Spinneyhill Posted October 16, 2019 Share Posted October 16, 2019 "Phosphate Free" is put on all sorts of products. It is fashionable. They never contained nor would contain phosphate anyway! Link to comment Share on other sites More sharing options...
1936 Viper Posted October 16, 2019 Share Posted October 16, 2019 I use Prestone 50/50 in my D2. Cools well and is clean as a whistle. Link to comment Share on other sites More sharing options...
trini Posted October 16, 2019 Author Share Posted October 16, 2019 An old rad guy showed me a piece of flat brass from a honey comb rad and asked me to look at it to see if there are holes through it. I could not see any. But looking through it against the sunlight there were lots of fine pin holes. He said he contacted about 4 of the manufacturers who sells their brands here and found what he thought is best and recommend it for old radiators and also newer ones. He said he based his findings on the chemicals used in manufacturing. He may be right but how do we know whether or not the previous owners treated the radiators gently, like changing the fluids as recommended ? Link to comment Share on other sites More sharing options...
Bloo Posted October 16, 2019 Share Posted October 16, 2019 Typically they didn't. If the car was located in the US, someone probably drained it out in the summer, and then put the same stuff back in later. Link to comment Share on other sites More sharing options...
Stude17 Posted October 17, 2019 Share Posted October 17, 2019 (edited) 17 hours ago, Spinneyhill said: "Phosphate Free" is put on all sorts of products. It is fashionable. They never contained nor would contain phosphate anyway! What do you base this statement on? https://www.liveabout.com/antifreeze-red-or-green-262558 Edited October 17, 2019 by Stude17 (see edit history) Link to comment Share on other sites More sharing options...
Spinneyhill Posted October 17, 2019 Share Posted October 17, 2019 2 hours ago, Stude17 said: What do you base this statement on? Dishwashing tablets. Clothes washing machine powder. I am corrected that it may be in antifreeze. Thank you for that. Link to comment Share on other sites More sharing options...
C Carl Posted October 17, 2019 Share Posted October 17, 2019 I have developed a craving for a cold glass of gluten-free tomato juice at the moment. - CC 1 Link to comment Share on other sites More sharing options...
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