When did DEF become required ?
Thinking of upgrading to a DP. I want to avoid having to deal with DEF. What year models did it become a requirement ?
Forum Discussion
I was not in the market for my DP in 2007 until I went to an FMCA rally and attended a forum by the diesel manufacturers - Cummins, Detroit and Cat. As they said, at that time, they could not tell the long term effects of the new pollution-reduction requirements. So I took the plunge and bought my DP in May of 2007, but it had a 2006 Cummins engine. 2007 was the particulate filter requirements and 2010 came stricter requirements that were met by using DEF.
