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I had schrews install a prefilter on my 90 Wrangler. It did not enhance performance.

The reason the test is antiquated is that the test drags a locked tire across a wet surface and measures the resistance. It probably made sense prior to the advent of anti-lock brakes, but what vehicle doesn't have antilock brakes these days? Static vs dynamic friction.

I'm sure one of the automotive fluid testing labs could give you an answer. My concern with Ethylene Glycol would be if there is a "side tank" used to have the boiler either heat or preheat domestic hot water. You would not want to risk cross contamination with potable water in the the event of...

If you pull up the manufacturer spec sheet for almost any coolant, it will tell you what they consider the shelf life to be. That said, I wouldn't worry too much about it if I exceeded that, although I'd shake it up well before installing it.

You also may find that if you pull off a heater hose at the highest connection point, you'll get more coolant out of the engine. This is especially true if you don't pull the thermostat. Leave a heater hose disconnected when refilling until coolant starts to come out of it.

One thing I have noticed is the orange Chrysler brand 5 year MS-9769 antifreeze, which is usually considered to be a G-05 clone, doesn't list nitrates on the MSDS. Actual G-05 MS-9769 does list nitrites. The purpose of nitrites in antifreeze was to provide cavitation protection to diesel engine...

You may find this helpful; https://www.glysantin.de/en/zulassungslisten

What is the plus of G48 over G05 anyway? Snippet of Zerex G48 spec sheet; Snippet of Zerex G05 spec sheet;

Interesting. It seems to be the same deal with the NAPA HD you mention, nitrites in the description , but not in the MSDS. Maybe nitrites aren't required to be listed in the MSDS? I know I have seen them on other MSDS sheets though. Some companies seem to be better about full product disclosure...

Personally, it annoys me when manufacturers of coolants claim their product to be super special, yet don't actually publicly publish their ASTM test data. Pretty pictures aren't the same as test data. I did look for the test data on their website, if I missed it, I'll stand corrected.

I think the original MB325.0 is pretty close to G-05. Looking through the Zerex spec sheets for their "G" spec products shows G-05 as being 325.0 complaint, whereas the other are for other MB325.x standards. If that is the case, then G-48 is going to be quite a bit different. Have you mixed the...

It's interesting that they do list Nitrite on their spec sheet, but not in their MSDS. https://www.mobil.com/en/lubricants/for-businesses/heavy-duty-lubricants/products/mobil-heavy-duty-sca-precharged-coolantantifreeze

It seems to be widely accepted that 2-EHA can attack some plastics and silicones. No doubt OEMs that specify 2-EHA (dex-clone) coolants have avoided using those particular materials where in contact with coolant. That doesn't mean they aren't used in other vehicles or aftermarket parts. If it...

Looks like it is a 2-EHA coolant from the MSDS. That seems to be a common ingredient in so-called "works with everything" coolants. Some say it that it is incompatible with certain types of plastics and silicon seals or gaskets that weren't designed for it. I would have considered a final flush...

I see your post is a few years old, but it's an interesting question. Back in 1990, they quite likely spec'd the old conventional IAT Green coolant like almost everybody else. I wouldn't use that today, myself, in anything that I was willing to do a thorough flush on on, finishing with a...

I think the point is that the phosphates don't (apparently) fall out of solution easily. Really, the shelf life of any coolant is going to be related to ingredientes falling out of solution more than anything else. Silicates do that quickly, for example.

Shelf life, not in service life. Still if you're doing a 5 year change period, it would be nice to know whatever you had left over from the previous change is still good in bottle. The oddity of that product is that I can't actually find it listed for sale anywhere. The specs look great though...

I know I after deep diving on Zerex heavy duty antifreeze specs recently, I know the Zerex has "shelf lives" varying from >1 year (traditional green) to > 35 years ( HD Nitrite free ELC Red).

What would be the pro and cons of Decanedioic Acid, Disodium Salt ?

I thought it might be useful to see the differences in the MSDS sheets between the 6 products that Zerex puts in the Heavy Duty coolant category. They all have Ethylene Glycol, so for brevity I'll not list that. The first link should go to the detailed product information sheet, the second to...