My local refueling station just started selling RED Diesel Fuel. There's a label on the pump "For off road use only" How is this different from Diesel #2? What is the fine in California for using it? Not that I would use it of course, I'm just curious as I have never heard of RED Diesel Fuel. By the way, how would anyone know you are using it on the road. Do they have Diesel pickup police running around that I have not seen yet? Does the RED fuel stain the filter/line innards so that the feds can tell you've been using it? Is this something they actually test the big rigs for? I used to work at the TTT truck stop in Tucson some time ago. I think Diesel was something like 34 cents a gallon back then, it's about a buck fifty in San Jose, ca.