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Can I mix GM Dexcool with other brands ?

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My wife's Trailblazer is low on coolant, I was going to add some Prestone or other brands but I want to know if it's compatible with GM Dexcool already in the system.

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I wouldn't hesitate to mix different BRANDS of antifreeze as long as they are both extended life. You mainly dont want to mix extended life with conventional antifreeze. Prestone, I Believe, has antifreeze which is marked as being Dex Cool compatible.

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Thank you Sir !!

I thought Prestone was compatible but now I have the confirmation.

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I have heard the argument go either way but after seeing what dexcool and conventional coolant can do to a motor I would still error on the safe side and stick with whatever you have for coolant.

I think we are up to 6 different colors now. Green, orange, pink, red, blue, and yellow.

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Make it 7! Our Fleet charge with SCA is a nice deep purple! wink

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Make sure you have the radiators flushed regularly with the Dexcool, my brother-in-law that is a mechanic has had to replace many rediators because they become plugged if not flushed regularly.....But I am sure that would be the same with any of the coolants no matter what make or brand.

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Dexcool has never won a review in my book!

I also never have been a fan of mixing coolants. Just too much riding on that liquid to experiment (I.E. inner gasket failure issue and other things).

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Instead of paying extra for a dexcool flush you can flush them over to regular (green) coolant. most shops typically charge more for a dexcool flush so the cost savings is an incentive. If your flushing dexcool at regular intervals might as well switch to green.

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Good point Airjer!

I would do this and many have!

Dexcool is bad grin

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Went to walmart yesterday and they have Prestone Dexcool, added 1/2 gallon and it's all good now.

Thanks

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