Read this entire thread, Dinky503, thank you for documenting all of your troubles. I custom ordered my 2021 truck and had planned to put 500k+ miles on it, but it has been doing the frequent regen thing for a while now. I typically had my screen on the fuel economy page and never watched the DPF level page. My last few oil changes have all been at least a gallon over filled with "oil" so I am guessing that my engine will soon be eating itself also. I did send off an oil sample last week so I am very curious to the results of that. I did take the truck to the dealer last year with the "Too Frequent Regen" check engine light, they "fixed" it, and it went right back to doing the same thing and they then started telling me that the parts were not available. I have been checking in with them almost monthly checking on the parts, to be told the same thing, likely a critical error on my part to getting them to actually fix this thing. I use the truck 50/50 for daily driving and towing a 20k+ pound race car trailer and it is my only vehicle that I can pick up my kids from school in. This was my first new vehicle purchase ever so its a pretty big bummer that it's having issues.