Haha- yeah, those cost money which is rarely spent on the 6.5.
There is no noticeable power gains nor mpg gains.
The lower egt is not a factor until pushing REALLY high numbers and the 6.5 being idi instead of di does not get as much benifit from it.
Notice he doesn’t even mention the coating which so so well proven it isn’t worth mentioning to most of his customers- but here almost no one invests in that.