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Thread: ATTENTION: Know Your Jeep JK Wrangler Coolants and Save Your Engine!

  1. #261
    Nothing but a Thing MSJKU11's Avatar
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    Quote Originally Posted by BeRoyalKC View Post
    I didn't take the reservoir out and shine a light through it, but I'll do that next. My issue is when I replace the coolant thermostat I'll need to top the coolant off and I want to be sure I'm using what's in there. I'm assuming it's OAT since that's what it should've come with from the factory and I haven't noticed any issues (it either hasn't been topped off or it has been with the correct stuff). Outside of color there's no way for me to know if it had previously been flushed and incorrectly filled with HOAT, though.

    Might just have to consider a full flush to be completely sure.

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    I've never tried it but I wonder if you could mix some of oat that you purchase with a small sample from your reservoir to see if it reacts. Otherwise I'd probably do what you suggest to be on the safe side and do a full flush since it's realtivley easy.

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  2. #262
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    Quote Originally Posted by MSJKU11 View Post
    I've never tried it but I wonder if you could mix some of oat that you purchase with a small sample from your reservoir to see if it reacts. Otherwise I'd probably do what you suggest to be on the safe side and do a full flush since it's realtivley easy.

    Sent from my SM-G965U using Tapatalk
    I think it takes a long time to react but I'm not sure. And yeah just need to start searching for the steps to complete a full flush. I'd imagine there's a video out there somewhere.

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    Last edited by BeRoyalKC; 01-12-2019 at 11:46 PM.

  3. #263
    Caught the Bug dotnetrob's Avatar
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    Question

    I recently got my coolant in my 2015 JKU changed at a Valvoline. They did a full flush and fill. I am assuming they use OAT but not 100% sure. Anybody know what coolant they use, obviously a Valvoline brand. Asking because I like to keep some on hand to top up as needed.

  4. #264
    Old Timer HighwayTrout's Avatar
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    Quote Originally Posted by dotnetrob View Post
    I recently got my coolant in my 2015 JKU changed at a Valvoline. They did a full flush and fill. I am assuming they use OAT but not 100% sure. Anybody know what coolant they use, obviously a Valvoline brand. Asking because I like to keep some on hand to top up as needed.
    Id go and ask them.
    en hopup veritas

  5. #265
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    Quote Originally Posted by dotnetrob View Post
    I recently got my coolant in my 2015 JKU changed at a Valvoline. They did a full flush and fill. I am assuming they use OAT but not 100% sure. Anybody know what coolant they use, obviously a Valvoline brand. Asking because I like to keep some on hand to top up as needed.
    Most Valvoline stores carry the MaxLife Antifreeze Coolant, it is a HOAT base formula with a special chemical called Alugard which makes it able to mix with any of the other coolant formulations, i.e OAT, HOAT, P-HOAT, so you are good to go. (FYI some franchise Valvoline stores carry different Manufacture of coolant besides the MaxLife, so you could call the store or stop by just to verify what they did use for piece of mind)

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