OK.... here's a topic that has probably been posted before, but how much gas is safe in a tank full of diesel in a 96 GMC 6.5L pickup? Obviously none is best; but a station attendant today started to fuel up my truck with gasoline. I saw it and ran over and shut the pump down at 4.7 litres, which is 1 imperial gallon, or 1.25 US gallons. I filled the tank to the top to dilute it as much as possible, which is 128L or 34 US gallons. That's a 33:1 ratio. Does anybody know if I should be worried?? The station owner told me that during the winter they have customers that intentionally add gasoline to their tank to improve starting, but he was bound to say anything just to save his sorry butt. I'm not too worried about detonation problems while running, more fuel pump components and possibly the glow plugs igniting the fumes and causing grief. Anybody have experience with this?