DEF - all the same?
New to diesel. Is DEF all the same? I can buy and use anything or I need to be careful to buy..................??? Running a brand new Tiffin Red with Cummins engine. Thanks for any information
Forum Discussion
Through the study that I have done DEF is DEF. However there is a shelf life on DEF so make sure that what you purchase has a recent code date on it. I believe that the life of DEF is a year. You can research that very easily. I have found Walmart's to be fresh. I would think that any big truck stop would have fresh product in their tank.
