Just curious if any of you with old Detroits run additives in their fuel? If so what kind and why? I run it in my older diesel tractors as it is my understanding when they took the sulfur out of the fuel the lubrication of fuel pumps, etc was reduced. Most of the owners around me with old Detroits and MANs use Lucas oil. I have put it in my first tanks as the fuel was old and have mixed it with the fresh fuel I have added. Now that I have burned most of the old fuel out just wondering if I should continue this. Im not speaking of biocides but the additives that are supposed to clean injectors, stabilize fuel, etc.