Question About ULSD

[BigGreen06]

I'm just curious, how exactly did they come up with ULSD? Its something that's been picking at my mind, someone says that it is refined more, another has said that its a blend of bio and #2 (which I find very hard to believe because it has no lubrication properties at all). Personally I think the stuff smells like turpentine. I just want to know.
Thanks.

-BG06.

[Manatee]

It goes through a desulphurization process. Refineries had to build huge, expensive ULSD units to strip our more sulphur.

That's one of the many reasons that diesel has become so expensive in the past couple of years.

[BigGreen06]

So it is further refined, hence the reason for it being more expensive. Cool, I guess you really do learn something new everyday.
Thanks.

-BG06.

[d7rxr]

Yeah, and to desulfurize it, they have to put it under more pressure, hence the color change to look like antifreeze...lol

[elibenson]

More than that, the process that removes the sulfur also removes some of the "energy content" of the fuel. This is why you get more mileage out of the older "Low Sulfur Diesel".

[nick112207]

how are the powerstrokes with the ULSD? i know with the older cummins they run ok with it, but run even better if you dump a bottle of 2 stroke oil in the tank with it.

[94f250]

Ya there is very little lubricity in the ultra low sulfur diesel, The diesel engines need lubricity to keep parts like injectors, bearings, pistons, just about everything. It is going to make the parts wear/fail quicker. It is good to put in additives to the fuel, or even run a B20 mix which brings the lubricity back up to the old low sulfur diesel spec.