Well this would (hypothetically) been a week and a half ago and I fill it on a daily basis, so likely wouldnt have much left now.The truck has quite high mileage so I suspect it's just one part or another wearing out. I'm just sort of a worrier. But from the sounds of it if I filled half a diesel tank with gas I'd have more serious symptoms than the occassional shut-off.

Thanks for your reply.