clackclack wrote:
It takes about 25% more oil to make a gallon of diesel fuel than a gallon of gas. So, if you figure you pay ~15% premium... make some assumptions about light sweet crude oil (the commodity) as a $% of gross retail cost (i.e.; back out margin's, refining, tax, etc...). Bad news, since Diesel uses more crude, as crude $'s go up and become a larger % of gross retail cost, the delta between gas and diesel should theoretically increase. Personally, I believe, as the carbon market matures, we (diesel consumers) should be given a break since we produce comparatively less carbon (green house gas). Wouldn't it be great if we got a carbon credit at the pump to help offset the higher production cost (e.g.; refining and crude)...

Sorry, but no.
I'm not sure where you got that information from, but it smacks of the anti-diesel lobby, as that is the exact kind of crap they spew.
Crude oil is refined by heating in a column and waiting for the separation of layers. Hence why diesel is referred to as a "middle distillate" b/c it comes out from the middle of the column, heavier oil is below it, Kerosene is above it, gasoline is above that. As for the amounts... Not so much. Diesel is EASIER to refine than gasoline, and maintains more of the source hydrocarbon chains (and more volume by extension) than gasoline does.
Granted this explanation is extremely simplified, but it gets the general point across: As diesel is closer to the source material, it is easier to manufacture, and retains more volume b/c less needs to be removed to reach that final product.
I have seen postings extremely similar to yours in the last few days on several different alternative fuel or diesel forums. I would think there is a concerted effort to defame diesel engines just as they are regaining popularity and the future of this country might be one with less fuel usage... But then that would make me a conspiracy theorist.
It does make one wonder however... How far would the oil industry go? Taking back all the EV-1 cars and destroying them b/c they could put a big dent in oil... Defaming diesel for similar reasons... Constantly talking about "gas to liquid" and "gassification" of everything under the sun... Except that none of these products will be commercially available anytime soon... Defaming biodiesel from waste sources along with any other alternative fuel option as "unable to replace ALL of our needs, so let's not do it at all" kind of talk...
It certainly makes you think.
Actually Geordi, much if not most crude is no longer refined by distillation alone. Since light sweet crude is getting harder and harder to come by, refinerys have developed the process of Hydrocracking. Hydro cracking gasoline is somewhat easer than diesel because diesel does indeed use more of the crude mass than gasoline. If one gallon of hydrocracked crude could be completely converted to gasoline or diesel, a higher volume of gasoline would be produced than Diesel because of the fact that diesel is about 20% to 30% denser (weighs more) than gasoline. With modern hydrocracking techniques virtually any percentage of any desired fuel can be obtained within certain limitations. Diesel was never really a "byproduct" of fractional distillation but simply had a more limited market and so brought a lower price. Nowadays refinerys can adjust their product output to what the market wants ie.. more middle distillates for winter heating and more light oils for summer driving. There is no conspiracy to do away with diesel powered transportation as shown by the increase of diesel vehicles produced around the world every year, but I'm sure that petroleum industries are down playing the importance of alternate sources of hydrocarbon fuels until they are in a position to make a lot of money from them.