Sounds to me like your buddy got some bad fuel. I always buy fuel from places that sell a lot of it, like truck stops and I haven't noticed any change in my truck. Maybe a slight decrease in mpg, but that could be my heavy foot too!! There is a lot of myths out there about the new ULSD, there is nothing wrong with the formula itself. I don't believe they would be releasing this stuff if all the OTR trucks were puking all over the place. We had some adjustments when changing over, such as the O rings in the fuel/water seperator valve, but there is sufficient lubricants in the new fuel to meet the needs of any diesel engine. As I said if worried add some Power Service or other additive of your choice ( not something somebody told you to do) it doesn't cost $5.00, probably around $1.00 to be honest. I have been doing this with every tank since I bought the truck in 03, not because of the new fuel.