I got my truck a little over a month ago (first time owning a diesel). I've been reading about the Supreme Diesel on other threads. Here in Southern California we are so limited on what we can put in our vehicles as far as fuel goes. I noticed that the company that makes the BP supreme also does the BP ECD Fuel which ARCO sells. Of course it is supposedly the new so called enviromentaly clean fuel. I wouldn't run ARCO gas in my old 2000 1500 Silverado because of what I've heard other people say about it. Does anyone have any experience with the ARCO Diesel fuel? If it's a bad one to use what is the best Diesel fuel in Southern California to use?