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#4470556 - 07/26/17 01:18 AM 2eha and toyota
Deontologist Offline


Registered: 06/07/17
Posts: 12
Loc: FL
I have put SuperTech's "universal" coolant in two of my Toyota vehicles. I read on the label of the ST bottle that it contains 2-EHA. From what I understand, 2-EHA eats at silicone seals. I also read that Honda hates 2-EHA, and Toyota avoids it.

1) How screwed am I? I'm looking to keep both of the cars for about another 50k miles or so (both are 150k and over 10 yrs old).

2) Has anyone else used 2-EHA containing coolant in their car?

3) How can ST advertise a "universal" coolant when it's technically not?

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#4470566 - 07/26/17 02:12 AM Re: 2eha and toyota [Re: Deontologist]
TheKracken Offline


Registered: 04/18/17
Posts: 515
Loc: Fort Worth TX
If you don't mind flushing it out then I would get some Zerex red coolant which is supposed to be exactly like toyota red and just put that in. Otherwise I wouldnt worry too much.....but if I was looking at buying your used vehicle I would walk away if it didnt have red coolant in it...
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#4470568 - 07/26/17 02:52 AM Re: 2eha and toyota [Re: Deontologist]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Switch over to Prestone Dexcool. I've never had any problems with it. Mix it 50/50 with distilled water.

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#4470590 - 07/26/17 04:59 AM Re: 2eha and toyota [Re: Deontologist]
pbm Offline


Registered: 04/19/04
Posts: 7605
Loc: New York
Thousands of Toyota owners have used Dexclones without any problems.
I wouldn't worry about it.
ST Universal used to be made by Old World Industries (makers of PEAK) although I'm not sure if that is still the case....at any rate I'm sure it's a quality product.


















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#4470605 - 07/26/17 06:04 AM Re: 2eha and toyota [Re: pbm]
mooferz Offline


Registered: 01/30/16
Posts: 325
Loc: TX
Originally Posted By: pbm
ST Universal used to be made by Old World Industries (makers of PEAK) although I'm not sure if that is still the case....at any rate I'm sure it's a quality product.

According to the SDSs, looks like it's made by Prestone nowadays.
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#4470612 - 07/26/17 06:12 AM Re: 2eha and toyota [Re: Deontologist]
Sayjac Offline


Registered: 10/13/08
Posts: 12268
Loc: The Old North State
According to known information about 2eha and universal AFs your basic premises listed are correct.

1) Might be or maybe even likely fine for the ~50k you state. As you already did it unless you want to do a complete flush/exchange, might as well go with it.

2) Personally have avoided and avoid universal AF containing 2eha in non Dex spec'd vehicles. I'm sure others have used universal AFs in Toyotas, can't speak to their results. I am currently running Peak Global Lifetime Universal OAT (no 2eha) in an 01 Tacoma three plus years, original radiator, doing fine.

3) ST advertising as 'Universal' breaks no law. In fact the greatest amount of AP store private label and other 'universal' labeled AFs are the same as ST, ie., an OAT AF containing 2eha. Peak Long Life is an example of a non store brand that would be the same or similar to ST. "Iirc", seems Old World owner of Peak brand makes ST, seems the MDSD sheet might make reference to that.

EDIT. Saw comment above. Perhaps ST has changed makers/suppliers, but doesn't change main point about containing 2eha.


Edited by Sayjac (07/26/17 06:22 AM)
Edit Reason: added comment

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#4470635 - 07/26/17 07:12 AM Re: 2eha and toyota [Re: Deontologist]
barkingspider Offline


Registered: 12/22/13
Posts: 2049
Loc: socal
When I had my Pontiac Vibe (same as the Toyota Matrix), I flushed the old coolant and used dexcool. It worked perfect. I wouldn't worry about using ST coolant. U should be good to go
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#4470904 - 07/26/17 11:34 AM Re: 2eha and toyota [Re: Deontologist]
zorobabel Offline


Registered: 01/27/11
Posts: 479
Loc: Anaheim, CA
I used peak/prestone in a Honda Accord I used to have and had a hose eat itself and various leaks started. It was high mileage though, and it might have happened regardless.
The Corolla in my signature has original WP, radiator, hoses in fact it's all pretty much original except serpentine belt tensioner, intake gasket and wear items. I used Zerex Asian drain and fill every 3 years starting at the 6th year.
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#4470947 - 07/26/17 12:06 PM Re: 2eha and toyota [Re: Deontologist]
JMJNet Offline


Registered: 09/06/07
Posts: 934
Loc: TX, USA
For no 3, their definition of "Universal" and your definition of "Universal" are different?
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#4470966 - 07/26/17 12:23 PM Re: 2eha and toyota [Re: Deontologist]
Sayjac Offline


Registered: 10/13/08
Posts: 12268
Loc: The Old North State
In the same AF section as ST, WM now sells Valvoline Asian Vehicle AF for ~$12/gal, it's the same as Zerex Asian Formula. Asian PHOAT AF perfect for Toyotas. Like the Asian OEM AFs comes as a premix.

Likely doesn't help with your question. Just pointing out there are many reasonably priced same as OEM 'type' aftermarket AFs that generally now can be easily found.

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#4471501 - 07/26/17 11:29 PM Re: 2eha and toyota [Re: Deontologist]
Deontologist Offline


Registered: 06/07/17
Posts: 12
Loc: FL
So I'm really confused now, and I don't know whether I should not worry about it or flush it out soon and replace it all with some Zerex Asian or equivalent.

I think I might flush it out with Zerex in the next few weeks just for some peace of mind. Just wish that there was a definitive answer. Is there a Toyota or Honda rep on the forums somewhere?


Edited by Deontologist (07/26/17 11:31 PM)

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#4471506 - 07/26/17 11:38 PM Re: 2eha and toyota [Re: Deontologist]
2strokeNorthstar Offline


Registered: 07/19/17
Posts: 274
Loc: PR CA, USA
It doesn't matter. BMW uses 2-eha, millions of cars are not running OEM coolant. If you are going to worry, flush it and move on. You will never rest easy while it is in there it sounds like.

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#4471522 - 07/27/17 12:13 AM Re: 2eha and toyota [Re: Deontologist]
Nyogtha Offline


Registered: 10/13/14
Posts: 2327
Loc: San Antonio, TX
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#4473791 - 07/29/17 10:26 AM Re: 2eha and toyota [Re: Deontologist]
Deontologist Offline


Registered: 06/07/17
Posts: 12
Loc: FL
The more I think about it, the more I might just leave the Super Tech in there. Because I've looked high and low or any official statement from Honda and Toyota about 2-EHA, and despite what people have said on forums like BITOG, neither of them have actually issued any official statement regarding 2-EHA.

The 2-EHA controversy seemed to have started with a few lawyers representing clients who claimed their cars were damaged by DexCool. And as we all know, lawyers tend to stretch the truth sometimes.

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#4475018 - 07/30/17 09:28 PM Re: 2eha and toyota [Re: Merkava_4]
MaximaGuy Offline


Registered: 09/20/03
Posts: 1220
Loc: Austin, TX
Originally Posted By: Merkava_4
Switch over to Prestone Dexcool. I've never had any problems with it. Mix it 50/50 with distilled water.


Worst advice. Dexcool will gel and kill your cooling.
My brother had a Honda with 168K miles and he took it to Sears Auto for his tires and they told him the coolant was in bad condition.
So they dumped Dexcool and 5K miles later the engine was in flames on 101.

OEM is the only way in the cooling department.
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