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Blue DEF Expiry Date ?
I sent Blue DEF an email, but so far no response. Bought a box of Blue DEF from Walmart. On the box there is a date, but it does not say if the date is the manufacturing date or the expiry date. My understanding is that DEF could be less effective after 12 months. Does anyone know what the date on the box means?
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DPAM
2017 GMC Denali diesel, crewcab, 4x4, regular box.
2010 Montana 3150RL- Moving to Montana Package , Hickory Edition Package, wet bolts
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