[smokingfrog]

I was just wondering about this the other day.

More specifically, how do they remove the sulfur for ultra-low sulfur diesel. Diesel used to be cheaper than gasoline, but now is more expensive.

[thackney]

Gasoline also has low sulfur requirements.

Hydrodesulfurization
http://en.wikipedia.org/wiki/Hydrodesulfurization

There is siginficant competition in the different processes used to remove the sulfur.

http://www.fwc.com/GlobalEC/Refining/sulfurtechnology.cfm

http://www.cbi.com/technologies-services/hydrodesulfurization/

[knarf]

I remember the same argument when we went from leaded gas to unleaded.

Leaded gas required an additional process and product as opposed to unleaded, yet, leaded gas was cheaper.

I eventually thought the reason was to clean out all the leaded gas as quickly as possible so the tanks would be re-filled with unleaded ...

and as Kurt Vonnegut Jr. so aptly put it;

and so it goes.

[TexasCajun]

Diesel used to be cheaper than gasoline, but now is more expensive.

Right after I bought my first diesel pickup, Chevy 2500 Duramax.