Diesel Fuel Quality Debate

[RETHomer]

I believe powertrain engineers have done their job in significantly improving diesel engines for American vehicles, but it's my understanding US-based refineries have done little to help them. Sulfur content is too high and the cetane value is too low. Regulations will address the sulfur problem late next year but what is the problem with improving cetane? An engineer told me the diminishing need for heating oil in the Northeast directs more of the harsher fuels into the diesel pool. He also said the catalytic cracking process contributes to the problem. He said foreign countries don't rely on cracking as much as the US. Am I oversimplifying the problem? Can someone state the refiner's position? Are we truly at a crossroads for diesel advancement if the fuel quality is at a stagnated level?

 

[natester]

Regarding sulfur I believe that the issue is there exists a far better lubricant than sulfur, thus it needs to be phased out. Diesel containing 2% biodiesel has far better lubricity than sulfur. In addition a small amount of biodiesel blend improves the emissions of diesel fuel. I have a 1999 and 1985 Mercedes that I run on 100% biodiesel when the temperatures are above 40 degrees F. During colder temperatures I use 50-70% biodiesel. This is a tremendous fuel to use. Using 100% biodiesel the only time I can get any smoke from the exhaust is to start a cold engine without any glow plug warming. Even then the smoke is a minimal white cloud for a few seconds. Currently, the cost is higher, but I am willing t pay more for a fuel that is made in my home state (Ohio), promotes employment in the U.S., pollutes less, and promotes smoother engine idling.