I'm right at 89 hours on the tractor and had the regen light come on yesterday. I'm surprised it did not come on much earlier based on how I drive. When I was researching opinions seemed to be split on how a dpf tractor should be driven. I have always used a lower gear and rpm on my tractors to do work. I'm digging in to pipe clay and we have not had any rain in 3 weeks. I have yet had a need to run over 2000 rpm. tractor easily powers through the hard clay in (L) at 1900 rpm. Followed the regen instructions in the manual and was very easy to do. I though it would have went to a higher rpm but stayed at 1500 rpm.