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2021 Outback Onyx Edition XT
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Discussion Starter #1
Can anyone recommend a product to test the acidity of my coolant? I am a little concerned about the head gaskets in my 2011. I have found a product on Amazon, but the reviews are slightly mixed because it is extended life coolant.

Would it be more prudent to change the coolant around 90,000 miles instead of running it for the full duration?
 
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