DEF Math
The owner's manual says my truck has a 5.5 gal DEF tank. I waited until I was down to 1/4 on the gauge, just above the red zone, and added a 2.5 gal box of Blue DEF from Advance Auto. Now the gauge ...
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They have it at Costco? Thanks for the heads up on that!
Lantley how do you know if you're out of DEF without a gauge?
Lantley how do you know if you're out of DEF without a gauge?
