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Old 07-15-2015, 01:18 PM   #21
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M

It's a matter of what's best for your application .. not just choosing a better product.
i don't disagree with that at all. However very often the best for the application is also the better product. Our Range Rover will run on 87 octane but the engine was designed to be run on higher octane so that's what we run it on. The engine in my new pickup was designed to run on 87 octane. It will actually run on E85 although the manual is worded in such a way as to imply one would be a fool to do it.. So i run it on 87 octane.

We use Cat diesel coolant in the engines on our boat. Is it absolutely necessary? Maybe not. But I prefer to follow the advice of people we know who are actually in the diesel engine manufacturing industry rather than a lot of conflicting anecdotal opinions on an amateur boating forum. And since nobody has said that coolant formulated for diesel engines is bad for the engines in our boat, it makes no sense to not use it, particularly when the overwhelming opinion of the folks we've talked to in the diesel engine industry is to use it.

In the case of coolant, the cost difference between using diesel coolant and the automotive "green stuff" is insignificant. Particularly when one figures in how seldom one has to buy it. It's not like fuel, which one has to buy all the time.

So that's why we do what we do. What other people do is what other people choose to do.
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Old 07-15-2015, 03:28 PM   #22
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I had a half gallon of antifreeze left so I measured the temp of it and of the jug of distilled water then mixed them togather.

Antifreeze 85.6 It was stored in the ER.
Distilled Water 82.4 It was stored in a cabinet.
Mixed togather 94.2

So it was not just my imagination.

It did begin to cool right away though.
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Old 07-16-2015, 06:58 AM   #23
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The yellow Prestone antifreeze is a No No for Any diesel. It will "Scale" the tubes of your heat exchanger and Slowly over time begin to over hear your diesel. Two years of frustration before I figured this out!
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Old 07-16-2015, 11:23 AM   #24
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Marin,
Many folks even in the marine industry have different opinions and recommendations. The only thing to do then is to buck up and get as objective as possible and look at all the variables. For example if we knew many skippers that have gone for decades using the green stuff we could be very correct and comfortable doing same. I lean too strongly at times to the think for myself way of coping w things but most often it works well. I used an ultra performance synthetic motorcycle racing oil in my UL aircraft engine when the manufacturer said don't use it. They said they didn't have time to test all the very different kinds of synthetic oil. So I did my own testing and it payed off.

READY2GO,
Thanks for taking the time to test.
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Old 07-16-2015, 11:50 AM   #25
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Quote:
Originally Posted by READY2GO View Post
I had a half gallon of antifreeze left so I measured the temp of it and of the jug of distilled water then mixed them togather.

Antifreeze 85.6 It was stored in the ER.
Distilled Water 82.4 It was stored in a cabinet.
Mixed togather 94.2

So it was not just my imagination.

It did begin to cool right away though.
Interesting... thanks
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Old 07-16-2015, 11:51 AM   #26
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I'm using a long life organic acid coolant.
I'm not a big fan of the old school green coolant mainly due to the silicates used for protection. They are slightly abrasive and cause wear on bearings and impellers. The other problem is that they are sacrificial in nature, and lose their ability to protect your engine over time, whereas the protection of organic acid coolants does not diminish.

The only disadvantages with the OA coolants are that they shouldn't be mixed with the green stuff (and vice versa) and they are not suitable for old style copper radiators because it does not protect the lead solder.

Other than that - fill it up and your good to go for 5 years.
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Old 07-16-2015, 12:25 PM   #27
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Quote:
Originally Posted by READY2GO View Post
I had a half gallon of antifreeze left so I measured the temp of it and of the jug of distilled water then mixed them togather.

Antifreeze 85.6 It was stored in the ER.
Distilled Water 82.4 It was stored in a cabinet.
Mixed togather 94.2

So it was not just my imagination.

It did begin to cool right away though.
Just a guess - But I would say the antifreeze contained some ethylene, which when oxidises produces ethylene oxide. When that mixes with water, it causes a chemical reaction which produces ethylene glycol, (the main ingredient in antifreeze.)

Maybe your batch was short a pinch of water..
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Old 07-17-2015, 07:09 AM   #28
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"The only disadvantages with the OA coolants are that they shouldn't be mixed with the green stuff (and vice versa) and they are not suitable for old style copper radiators because it does not protect the lead solder."

And how do you think your engines heat exchanger tubes are held in place?
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