Ok I had my oil filter get a hole in it somehow on my plow truck and I replaced the filter. The leaking went away. Friend ran the truck 2 and a half hours out of town with no problem and then started coming home got about half way and it needed oil. He claims he looked at it and it has a 9 inch crack in the block. He said it probably froze over the winter and that is the problem. I have not seen my truck yet as its on its way here on a wrecker. Does this make sense to anyone? Or do you think the same as I do and that he was running it hard and messing around and did something? Nothing of mine will ever be loaned out again and I need to know where to go with this.