will i was helded to pickup some calves for the stockyards and pulled in to get fuel, well before i new it i had put about 4 gallions of low sulfur diesel in my 6. 7. so i ran across the highway and found ULSD and full it up about 24 gallions. so if any body could chime in and give me some advise. i just hope i didn't mess up my truck, felt like it ran fine all the way home.