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Stick with Asian pHOAT or go with Prestone? #5462450 06/25/20 02:12 PM
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nthach Offline OP
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I'm going to show a friend how to change oil on her 09 CR-V along side doing a "major" service(more or less a wallet flush at the dealer) - fresh fluids, new plugs/filters, valve adjustment and a visual inspection of the chassis/axles/brakes.

The car has seen serviced at a Honda dealer in Wisconsin before it made its way to California. A local neighborhood mechanic has serviced the car. The car was topped off with Dex-Clone. I'm debating doing a spill and fill with OEM Honda or Zerex Asian Blue/GC Blue premix or considering the fact there is some 2-EHA and sodium neodecanoate in the system, going with Prestone Cor-Guard which is like Japanese pHOAT but with 2-EHA and decanoate instead of benzoate or sebacate like Zerex or the factory fill.

In either case, I think both choices are valid but has anyone seen gasket or heat exchanger failure in Japanese cars using "universal" coolants? I know PGL was the favorite here due to a non 2-EHA formula and I've used that in an old Nissan Frontier.

Re: Stick with Asian pHOAT or go with Prestone? [Re: nthach] #5462461 06/25/20 02:26 PM
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jayjr1105 Offline
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I'd use an asian blue forumula of some sort. Zerex, Peak, Pentosin, etc.


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: Stick with Asian pHOAT or go with Prestone? [Re: nthach] #5462471 06/25/20 02:32 PM
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Donald Offline
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I think you need to flush to get what is in their out. Then Zerex Asian blue.


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Stick with Asian pHOAT or go with Prestone? [Re: nthach] #5462472 06/25/20 02:33 PM
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Zerex Asian Vehicle from Walmart. Blue or Pink.

Re: Stick with Asian pHOAT or go with Prestone? [Re: nthach] #5462516 06/25/20 03:32 PM
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I have a 2012 HYundai Santa Fe that got O'Reilly UNiversal (before I knew any better.) Put about 75K on the stuff. Changed it out again with the same stuff after I had a starter fail and had to remove coolant lines to get it out. Seems okay. An 09 Honda though? HOnestly, I don't know. I have not heard of any cars having issues lately though, so I assume it's not a big problem anymore or they would be liable if damaged was caused. That being said, getting the right stuff for your car isn't hard or expensive, so go with what is recommended by OEM.

Last edited by Urshurak776; 06/25/20 03:33 PM.

2012 Hyundai Santa Fe, 153,000 miles, Havoline Pro DS Full Syn 5W-20, COS3593A Champion Filter.
2014 Kia Rio, 92,000 miles, QS Full Syn 5W-30, COS3593A Champion Filter..
Re: Stick with Asian pHOAT or go with Prestone? [Re: Urshurak776] #5462567 06/25/20 04:10 PM
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nthach Offline OP
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Originally Posted by Urshurak776
have not heard of any cars having issues lately though, so I assume it's not a big problem anymore or they would be liable if damaged was caused. That being said, getting the right stuff for your car isn't hard or expensive, so go with what is recommended by OEM.

My usual inclination is OEM but the car in question is owned by a pretty busy person so I dunno who will do the next oil change. From reading here, there are many here who aren't using OEM spec coolants with success here. Peak Global being the prime example.

The new Cor-Guard formulation of Prestone does meet Japanese coolant specs(phosphated, no silicates/amines/borates) but with a different organic acid. I would imagine by now(around 2000-2005 when the Japanese switched over to pHOAT like Honda Type II and Toyota SLLC pink), cars would be using more robust elastomers and plastics in the cooling system to handle organic acid inhibitors.

Re: Stick with Asian pHOAT or go with Prestone? [Re: Urshurak776] #5462602 06/25/20 04:39 PM
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Leo99 Offline
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Originally Posted by Urshurak776
I have a 2012 HYundai Santa Fe that got O'Reilly UNiversal (before I knew any better.) Put about 75K on the stuff. Changed it out again with the same stuff after I had a starter fail and had to remove coolant lines to get it out. Seems okay. An 09 Honda though? HOnestly, I don't know. I have not heard of any cars having issues lately though, so I assume it's not a big problem anymore or they would be liable if damaged was caused. That being said, getting the right stuff for your car isn't hard or expensive, so go with what is recommended by OEM.


Put 300k miles on the old Rav4 with universal coolant.

For a friend's car, I'd have them take it to a shop. I don't want to be blamed should anything go wrong.


Without data you're just another person with an opinion. W. E. Deming


2004 Corolla 125,000 miles
2004 Rav4 399,852 miles (RIP)
2015 Camry 101,000 miles
2020 Rav4 6,000 miles
Re: Stick with Asian pHOAT or go with Prestone? [Re: nthach] #5462701 06/25/20 06:20 PM
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haggler Offline
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do a flush with multiple gallons of distilled water and add in full strength undiluted japanese compatible coolant to make the mixture 50/50.

https://www.pepboys.com/oem-antifre...-subaru-with-blue-coolant/product/879925


2019 MX-5 Soft Top Miata - Soul Red Crystal - M1 EP 0w20 - M1 EP 108a Filter
2020 Chevrolet Equinox - Factory Fill/Filter
Re: Stick with Asian pHOAT or go with Prestone? [Re: nthach] #5462831 06/25/20 09:10 PM
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Jake_J Offline
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It's your choice but I would have no qualms about doing a drain and fill with Prestone Cor-guard. It's a P-OAT just like the original Honda type 2 (aka Honda blue), and given that sebacate and 2-Es HA are both known plasticizers which means if you believe the old 2-EHA eats gaskets myth then the sebecate in the factory coolant is doing the same. Also the universal type coolants are dyed very neutral colors to not change the original color of the factory coolant. I once serviced a Grand Cherokee where I drained the original redish Chrysler HOAT and refilled with Zerex G05 which has a more golden color and after the coolant had mixed it was back to the Chrysler HOAT color.

Re: Stick with Asian pHOAT or go with Prestone? [Re: Jake_J] #5463322 06/26/20 12:39 PM
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nthach Offline OP
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Originally Posted by Jake_J
given that sebacate and 2-Es HA are both known plasticizers which means if you believe the old 2-EHA eats gaskets myth then the sebecate in the factory coolant is doing the same.

That's my thought - OATs by their nature are plasticizers. Mercedes was once on the anti-2EHA bandwagon recently backspeced all their G-05 cars to use G-48, which has 2-EHA, BMW has used it for decades too. The Germans were the first to use plastics extensively in their cooling systems, starting with plastic tank radiators.

The GM issues were "open" cooling systems with wet intake manifolds and gaskets that couldn't handle the more aggressive OAT coolants - there's documentation about the PA66/GF33 and silicone IMGs used on the 1990s era Vortec engines, and I personally done a IMG job on one.

I'm thinking this car is going to be my guinea pig with the Cor-Guard. I don't think Honda uses silicone to seal up the coolant path.

Re: Stick with Asian pHOAT or go with Prestone? [Re: nthach] #5468357 07/02/20 11:54 PM
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All of mine get Prestone once I flush the original OEM glycol out.

Re: Stick with Asian pHOAT or go with Prestone? [Re: nthach] #5468620 07/03/20 11:39 AM
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pbm Offline
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The PEAK full strength 10X that's on CLEARANCE at my AZ for $8 a gallon is closer to Asian P-HOAT than Prestone because it doesn't contain 2-EHA....
it's what I would use after flushing the system....This is the stuff:

https://www.bobistheoilguy.com/foru...45/peak-has-a-new-antifreeze#Post5230145


'Journalism is Dead'
Re: Stick with Asian pHOAT or go with Prestone? [Re: Jake_J] #5471471 07/07/20 04:28 AM
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Originally Posted by Jake_J
It's a P-OAT just like the original Honda type 2 (aka Honda blue), and given that sebacate and 2-Es HA are both known plasticizers which means if you believe the old 2-EHA eats gaskets myth then the sebecate in the factory coolant is doing the same.


Was not a myth. Bill from Mahle explains the real story about Dexcool.









1992 Toyota Pickup--SuperTech 10W-30 conventional--Fram PH3614
Re: Stick with Asian pHOAT or go with Prestone? [Re: nthach] #5472092 07/07/20 07:06 PM
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jharrison Offline
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I've run the orange GM Dexclone from Walmart in my Honda for 10+ years and no problem.

Last edited by jharrison; 07/07/20 07:06 PM.
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