Just use a DEF Refractometer to tell if def is still good.
https://smile.amazon.com/s?k=def+ref...s_ts-doa-p_1_6
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2018 Ram 3500 Laramie Longhorn DRW, Aisin, 4:10, B&W 3600 Companion
2019 3121RL Montana 20th Anniversary Edition
Did you ever stop to think, and forgot to start again?
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