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...
Forum Discussion
Answering your question directly, I have always used Peak DEF from wally world. I refill my tank when it shows 1/2 on my gauge. The def from wally will fill it right back to the full mark from the 1/2 mark.
