I purchased and added Walmart DEF Peak BlueDEF to my tank and am now getting the warning "incorrect DEF detected contact dealer". I contacted the dealer and asked about this. He said there are 3 types of DEF, clear, blue and some other color which I can't recall ;-) and he said I needed the clear. I asked how I was to know this since we were never told and he stated it was in the manual. Looked in the manual and all it talks about is this warning and that the engine will idle down after 50 miles. The service manager said I would be ok to wait until my service appointment and that it would just work it's way through. We live 75 miles from the dealership and have 3 weeks before my service appt. Has anyone else used the Peak Blue DEF and experienced any problems? So frustrated that this is some sort of secret menu item like IN and OUT burgers!