<div class="bbWrapper"><blockquote data-attributes="member: 17366" data-quote="biofumes" data-source="post: 147387"
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Our area is running low, the expensive($14.99) blue def seems to be around, but we're used to $9.99 for 2.5 gallons. I was about to purchase the Super Tech walmart stuff, but noticed it doesn't have the ISO certification
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</blockquote>API cert is what your looking for, and it’s right on the front label.</div>