Blue DEF
Just wondering about DEF for your diesel trucks. My dealer that I bought my truck from said just use Blue DEF and nothing else. I talked to another camper with a diesel truck and he said he buys the...
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I bought the cheap stuff...once...check engine light came on, said it was a DEF issue. Used the Blue, after about 2-3 tanks of fuel, the CEL went away, no problems in 50,000 miles.
