Based on my research, deionized water is fine as a mix with concentrated coolant as well. I happen to have a readily available source. From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of Rich Barber
Sent: Thursday, September 11, 2025 1:00 PM
To: 'John Grady' <jkg@xxxxxxxxxxxxxxxxx>; 'Tom Wilburn' <tomwilburn1@xxxxxxxxx>
Cc: 'Dyke Ridgley' <ridgleyracing65@xxxxxxxxx>; 'Club International Chrysler' <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: RE: {Chrysler 300} Evans Coolant I lost the effort to not contribute here Sorry. Distilled water is corrosive as it “needs” some ions and will grab them from any source, such as metal Ditto, our human bodies, as they need ions to function. Ever drink distilled water? Yuck. When healthy, our bodies do a great job of maintaining proper ionic levels in our blood. Distilled or RO good for batteries, but batteries don’t seem to need water anymore. Boilers need corrosion inhibitors that will not plate out on the tubes or turbine blades. Pretty sure makeup water is de-ionized at steam power plants, then corrosion inhibitors and possibly some ions are added. Corrosion engineers are valuable to many industries. Over and out. Rich Barber look, distilled is the best you can get , condensed H2O steam . All else in the liquid is left behind What it says on jar gets partisans for no rational reason if you understand what the word if you want pure H2O get distilled Personally with all the stuff in the block etc I think tap water is just fine; other views are personal opinions , , not science . Can’t argue with opinions, and that is ok , does not make them correct If its safe to go into your body its safe in your radiator On the other hand distilled is mandatory in adding water to battery as any harmless ions etc in tap water immediately form compounds and precipitates with acid . You get things like “ has to be left in moonlight for 2.75 hours on a night less than 67 degrees out or else xxx happens . I always did that snd xxx never happened. “ If not distilled- what? Jim: Please go to the No-Rosion website and technical questions section and read about which water to use in automobile engines. It is NOT distilled water. All the chemistry is explained there. Like you, I always used to believe and used distilled water until Jay Ross explained why it is not the best form of water. However, if you are happy with your choice, I am fine with it. On Wednesday, September 10, 2025 at 7:09:37 PM UTC-5 jd1968ci wrote: All, If anyone goes to use ethylene glycol (green) or even the orange Mopar HOAT (embittered) coolant, please do not forget to use DISTILLED water. NO well or municipal water. Distilled is available at every Walmart I've ever been to and is cheap. Distilled is better than deionized because distilled is purified by boiling and condensing the vapors away from the boiling water, which leaves any junk behind in the boiling water. Deionized is pushed through an micropore osmotic filter to separate out salts and minerals. I've been using distilled water with antifreeze concentrate since 1996 and haven't had any corrosion caused failures. I just wanted to bring that up because there's been no talk of the water to use in this discussion, and it does make a difference. On Wed, Sep 10, 2025, 4:02 PM 'Bob Jasinski' via Chrysler 300 Club International <chrysler-300-cl...@xxxxxxxxxxxxxxxx> wrote: Gary, Full strength propylene glycol is what Evans is. Based on what you’re saying even Evans would eventually need changing due to Glycol degradation. There seems to be no end to opinions on coolant and/or additives. I just want something that works with iron, brass, lead (solder) and aluminum that lasts at least 5 years between changes. From: chrysler-300-cl...@xxxxxxxxxxxxxxxx <chrysler-300-cl...@xxxxxxxxxxxxxxxx> On Behalf Of Gary
Sent: Tuesday, September 9, 2025 2:47 PM
To: Bob Jasinski <rpj...@xxxxxxxxxxx>; chrysler-300-cl...@xxxxxxxxxxxxxxxx
Subject: Re: {Chrysler 300} Evans Coolant A pressurized automotive cooling system using “propylene glycol” full strength is approximately 370.8°F (188.2°C). 50/50 mix of propylene glycol and distilled water with Pressurized system boiling point: ~250–265°F (121–129°C). Has a Freeze protection: Down to ~-29°F (-34°C). O'Reilly Auto Parts sells Sierra brand full strength propylene glycol for $28 gal. You need to adjust PH occasional with DOWFROST™ pH Booster or similar. Drain every 3 to 5 years. I recommend using a “water Wetter” that aids in cooling. Even a well-maintained propylene glycol (PG) coolant system with a stable pH of 8.0 to 8.5 will eventually need to be changed. The key reason? Glycol degradation over time, which leads to acid formation, even in closed-loop systems. Evans could be a smart long-term investment—if you're willing to do the full conversion. Otherwise, a high-quality PG coolant like Sierra or Engine Ice offers excellent safety and performance at half the cost and effort. I’m giving serious thought to changing over to Evans coolant in my G. I’ve read a lot about it and really like that it is a permanent solution to avoid coolant changes, eliminate cooling system corrosion, and reducing system pressure due to its high boiling point of 375 degrees F. I am aware that the conversion requires removal of all the old coolant and that the system has to be purged with a product made for doing that. I’m also aware that Evans is about $50/gallon so the conversion would come close to $300 altogether. Does anyone here have any experience with Evans coolant? I’d like to hear from those that have actually used it, and if you were happy with it or not. If not, what problems did you have? 300ly, Bob J Danville, CA | | | | | | | | | | | | | | | | | | | | | | | |
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