It's been a struggle keeping the farm tractors running in the extreme cold weather. It used to be that when we got diesel fuel delivered in November, it was mixed with kerosene so it would not gel, or worse turn waxy in times such as these.
Anyway, a diesel mechanic friend of mine told me that the modern refining process for diesel fuel now uses water to remove the sulfur. I would like to know how this works, and why anyone would thing it a good idea to put fuel through water. It just seems like asking for trouble to me.
Also, we have been avoiding purchasing new diesel engines because the modern legal emissions regulations (at least in the U.S) are concerned with NOx (is that nitrous oxide?) and use urea (mostly nitrogen, to my understanding), which can freeze, and cause other problems for operators. Can someone explain how the urea reacts with the diesel exhaust fluid, please?
Someone told me that in Europe, they are more concerned with carbon dioxide emissions, and don't require the systems that use diesel exhaust fluid. Is this true? If so, why are the Americans so much more concerned with NOx?