I highly doubt it's Prestone when WalMart is also the #1 seller of Prestone. Rumor I heard was it's Reochem which I have used in the past. The label on Reochem Asian Blue is nearly identical to OEM Nissan.
Asian Blue Coolant
- Thread starter Carlostrece
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Carlostrece
$100 Site Donor 2025
I guess who makes Supertech doesn't matter. What I should have asked is Does Supertech contain 2EHA?
^^^^ Asked and answered with documentation two months ago.
Carlostrece
$100 Site Donor 2025
Thanks for resfreshing my memory on that. My memory isn't the best. Also some posts by others in this thread made me wonder. Thank you!
Note: I've been having some memory issues, which might be old age, or might be a side effect of my blood pressure med which makes me groggy. Hopefully it's nothing more serious or I'll have to change my screen name to Drooling-Idiot.
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I don’t see how the SDS for Preston helps. It could contain no 2EHA whatsoever or a significant amount based on that sheet.
Walmart uses different suppliers based on region. It could be Peak, Prestone, Recochem, or possibly someone else 
twouvakind
Site Donor 2025
AI says,
Yes, Super Tech OE Blue Antifreeze Prediluted 50/50 is formulated with 2-Ethylhexanoic acid (2-EHA), also known as Sodium 2-Ethyl Hexanoate.
2-EHA functions as a corrosion inhibitor in coolants, helping to protect engine components from rust and degradation. However, some sources suggest that 2-EHA can potentially damage silicone components found in some engine models, particularly in heavy-duty applications where silicone seals are more common.
YMMV
Yes, Super Tech OE Blue Antifreeze Prediluted 50/50 is formulated with 2-Ethylhexanoic acid (2-EHA), also known as Sodium 2-Ethyl Hexanoate.
2-EHA functions as a corrosion inhibitor in coolants, helping to protect engine components from rust and degradation. However, some sources suggest that 2-EHA can potentially damage silicone components found in some engine models, particularly in heavy-duty applications where silicone seals are more common.
YMMV
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For toxicity, not due to lack of performance. The stuff is incredible. Enjoy it while we still got it.Europe just banned it
Carlostrece
$100 Site Donor 2025
I'm not disagreeing nor arguing with you or Nukeman. I respect and appreciate both of you for your knowledge and helpfulness. Maybe I'm missing something, but I have the following concerns/confusions and questions about Supertech.Walmart uses different suppliers based on region. It could be Peak, Prestone, Recochem, or possibly someone else
How can Supertech Asian Blue have one accurate data sheet (see post 23 by Nukeman) if a different manufacturer supplies each region?
Wouldn't the formulation vary per manufacturer, and therefore vary per region? If so, could that mean Supertech has no EHA in some regions, but has 2EHA in other regions?
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Carlostrece
$100 Site Donor 2025
I don't know if that ^ info is correct, but I do know that AI is an unrealiable source of info.
I have seen multiple instances of Google AI giving incorrect info about topics that I'm an expert on. I would not rely on AI. It's not nearly as smart or as knowledgeable human experts. I'm not an expert on coolants, but I am an IT expert/professional.
I've seen Google AI be wrong about car maintenancs topics that I already for sure knew the answers to. I've seen Google AI be wrong about IT topics many times.
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Carlostrece
$100 Site Donor 2025
Correct. You can't know if Prestone has 2EHA or how much.
Not knowing is 1 reason not to use it (because Prestone is being evasive on the topic).
The fact that it might (and likely does) have 2EHA is a 2nd reason not to use it.
Like Nancy Reagon used to tell kids... "Just say no to Prestone".
twouvakind
Site Donor 2025
That Prestone SDS is dated 1/13/20. The one I posted for the Old World Industries (AKA: PEAK) was dated 5/19/23.
I suspect that WalMart SuperTech changed AF supplier contracts between those dates since the bottle style changed in that timeframe (see below).
Old ST Asian Blue Current ST Asian Blue
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Carlostrece
$100 Site Donor 2025
If Supertech Asian Blue is now/currently manufactured by Peak (for Walmarts in all regions of USA) that is a good thing that would mean there's is currently no 2EHA in Supertech Asian Blue in 2025.
However, if Walmart changes suppliers in future, I won't know about it because I won't be keeping track of this topic in future. So in future, I won't know if Supertech AB has 2EHA.
So in future I won't be using Supertech AB because I won't trust it, even if it is currently fine.
That's a resolution of the Supertech AB topic for me. If others want to continue discussing it, that's fine.
However, if Walmart changes suppliers in future, I won't know about it because I won't be keeping track of this topic in future. So in future, I won't know if Supertech AB has 2EHA.
So in future I won't be using Supertech AB because I won't trust it, even if it is currently fine.
That's a resolution of the Supertech AB topic for me. If others want to continue discussing it, that's fine.
Carlostrece
$100 Site Donor 2025
For me it's Peak or Zerex. I'll get whichever is lower cost or more convenient to obtain. In my area, NAPA sells Peak. Oreilly sells Zerex. I think Walmart sells both. I'm not aware of any local stores selling Pentafrost, but if they did, I'd be willing to use it if price was right.
NAPA & Walmart are 1.5 miles from my home. Oreilly is ½ mile. I don't walk very well, but my mobility scooter can go sprinting speed for 5 to 6 miles. So Oreilly is an easy trip in good weather. The other 2 are doable.
Normally Walmart has best prices, but sometimes autostores have sales.
Two months ago I bought Peak AB concentrate from NAPA because it was on sale. It was put into an 03 Honda CR-V to refill radiator after system was flushed with distilled water. For one of my neighbors who takes care of me part time.
Recently I bought Zerex AB from Oreilly to be used in an 11 Hyundai Elantra. For my other neighbor who takes care of me part time.
I got cold feet when realized the Zerex jug says 5 years while Peak says 10. However, that's no longer a concern thanks to Slacktide explaining to me that the maintenance schedule will still be the normal time specified in the car's manual.
My questions and concerns have been well addressed by SC-Maintenance, Slacktide, Nukeman and others. Thank you very much!
NAPA & Walmart are 1.5 miles from my home. Oreilly is ½ mile. I don't walk very well, but my mobility scooter can go sprinting speed for 5 to 6 miles. So Oreilly is an easy trip in good weather. The other 2 are doable.
Normally Walmart has best prices, but sometimes autostores have sales.
Two months ago I bought Peak AB concentrate from NAPA because it was on sale. It was put into an 03 Honda CR-V to refill radiator after system was flushed with distilled water. For one of my neighbors who takes care of me part time.
Recently I bought Zerex AB from Oreilly to be used in an 11 Hyundai Elantra. For my other neighbor who takes care of me part time.
I got cold feet when realized the Zerex jug says 5 years while Peak says 10. However, that's no longer a concern thanks to Slacktide explaining to me that the maintenance schedule will still be the normal time specified in the car's manual.
My questions and concerns have been well addressed by SC-Maintenance, Slacktide, Nukeman and others. Thank you very much!
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Carlostrece
$100 Site Donor 2025
I also want to thank Trav and others for the excellent coolant related advice in an earlier thread regarding 2EHA in regard to universal coolant for my Buick.
I've known the basics about oil for years, but I didn't know much about coolant. What little I did know about coolant was outdated. I started learning about modern coolant a few months ago. First universal coolant vs Dexcool for my Buick (I'm now using Peak Titanium in my Buick). Later I started learning about Asian Blue for Honda and now Hyundai.
Thanks everyone for the education!
I've known the basics about oil for years, but I didn't know much about coolant. What little I did know about coolant was outdated. I started learning about modern coolant a few months ago. First universal coolant vs Dexcool for my Buick (I'm now using Peak Titanium in my Buick). Later I started learning about Asian Blue for Honda and now Hyundai.
Thanks everyone for the education!
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Carlostrece
$100 Site Donor 2025
Really? Those are good prices. I didn't see Zerex at my local NAPA last time. I did see Peak at local NAPA on sale in June and bought a jug.
My local Oreilly has Zerex, but not Peak. I bought a jug of Zerex from Oreilly in July. Unfortuneately it was not on sale.
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