I looked at that website also. The question is, what will it do to the engine, would using it void the warranty? There is a lot of discussion on this already...do a search on this site and you can read for days about it. I am going to stick to the pump for the moment, as the jury seems to be really undecided about it. Many use it. If I had an older car without all the electric crap that runs our 6.0's (like my old VW Rabbit p/u I had for years and years) I would switch to bio-diesel in a flash. But, my truck only has 600 miles, so I am not quite ready to switch over.