Anyone burning Rotella synthetic motor oil? I use this in all my diesel engines which is everything I own, truck, car, mower, hobby engines. I have quite a bit left over from oil changes and I was wondering if anyone had tried to burn this? It is a dino based synthietic from what I gather (not a true synthetic). I have been advised not to use it in my Cummins (I used to ad a gallon of crankcase oill to every fill up when I used regular Rotella). Thoughts?