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Toyota red in GM 3800? #4976649 01/12/19 02:00 AM
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71Chevyguy Offline OP
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Any harm in using Toyota Red in a 3800? I don't imagine it is anywhere near as harsh as dexcool. Just wasn't sure how it would do with the cast iron engine since most Toyota stuff is aluminum. I'm thinking it would be fine since these vehicles aren't picky but figured I would ask. Anyone aware of some bad reaction I should be aware of? Hard to pass up on clearance at Autozone, but should be able to return it in case it is a bad idea. Would be going into a 97 Regal GS L67 with all new cooling system, since it sprung a leak in the radiator. Thanks for your help guys!


18 Focus 1.0 Mobil1 5w20 / Mobil1 filter
98 Buick LeSabre Castrol Syntec Blend 10w30 / Made in USA Supertech filter
85 Skylark 2.5
71 Nova 250
Re: Toyota red in GM 3800? [Re: 71Chevyguy] #4976654 01/12/19 02:16 AM
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SnowDrifter Offline
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It'll be fine so long as you do a thorough cleaning of the cooling system.

I'm running honda blue in my chevy right now. Swapped out dex cool for universal, then went from that to the honda stuff in the interest of avoiding the ethylhexanoic acid present in OAT coolants


2005 Tahoe - 140k
2003 Forester(the swagger wagon) - Rehomed
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Re: Toyota red in GM 3800? [Re: 71Chevyguy] #4976671 01/12/19 03:07 AM
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FordCapriDriver Offline
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I've been doing some research and apparently, Dexcool and its various clones, are the only OAT coolants that contain 2-Eha these days, the P-OAT coolants used by Asian manufacturers or Si-OAT coolants used by the VW Group do not have it.
It also seems like not only is 2-Eha harmful to silicone hoses, you see OAT coolant have been accused of not protecting older types of solder well, it seems like 2-Eha and Octanoic acids are the main culprit of that ( according to the book "Engine Coolant Testing" from 1993 )

Toyota red is a Phosphate buffered OAT coolant so as long as your owners manual doesn't say it requires Phosphate free coolant you're probably fine.

Last edited by FordCapriDriver; 01/12/19 03:13 AM.

1975 Ford Capri II Ghia 3000 V6 - Repsol Elite Super 20W-50
1988 Ford Escort XR3i Cabrio - Shell Rimula R4X 15W-40 HDEO

Re: Toyota red in GM 3800? [Re: 71Chevyguy] #4977105 01/12/19 03:35 PM
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Dan55 Offline
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Toyota Red has a reduced service life 2 yrs 30k. Not worth it imho, unless you don’t mind changing fluid every 2 yrs,better options out there . Peak Global Lifetime is a favorite on this site.


2016 Lexus NX200T 2017 Mustang Conv Eco Prem
Re: Toyota red in GM 3800? [Re: 71Chevyguy] #4977617 01/13/19 02:42 AM
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FordCapriDriver Offline
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If it were mine i'd run Zerex G40 in it smile


1975 Ford Capri II Ghia 3000 V6 - Repsol Elite Super 20W-50
1988 Ford Escort XR3i Cabrio - Shell Rimula R4X 15W-40 HDEO

Re: Toyota red in GM 3800? [Re: FordCapriDriver] #4977921 01/13/19 12:50 PM
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71Chevyguy Offline OP
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Originally Posted by FordCapriDriver
If it were mine i'd run Zerex G40 in it smile


Yeah, I agree with you. If I were to just go out and choose one for the car it would be the VW equivalent stuff. Very similar to dexcool without the nonsense. I didn't realize the Toyota red was the short interval stuff or I wouldn't have gotten it, I was probably thinking of the Toyota Pink. I guess I could use it in my 85 Buick instead of the standard old school green though. I will probably return this stuff and get something else.


18 Focus 1.0 Mobil1 5w20 / Mobil1 filter
98 Buick LeSabre Castrol Syntec Blend 10w30 / Made in USA Supertech filter
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