selenis is the dogs watsists first hand experience end off
i'm not saying using any other oil is going to instantly destroy your engine but that would be stupid
at the end of the day it's personal preference what you use in your car and i'm not going to step on anyones toes i can only recomend what i use as i know how good it is
althou on the destroying engines front just watch this space on modern diesels with dpf problems relating to oil times are changing we are starting to see problems