@NothEastTahoe in another thread with a post by @CAPantherFan they explained how the DFM was causing problems with the 6.2 and after the switch to AFM it’s been much better as far as lifter failures and I actually asked my service manager yesterday and she did recommend dmax but said she hasn’t seen lifter failures since 2019 and that 2-3 month build span in the spring of 2021.