When you think of diesel trucks and the VW golf comes to mind but there is alot more to it. Im just guessing here but if you took up all the trucks, trains, construction equipment, and ships that run on diesel they would consume more diesel in one day then all the cars in the same period.
Thoes really big monster dump trucks the size of a house if I remember correctly they suck up something like 1600 gallons of diesel in a 12 hour shift and they run them 24 hours a day and there is alot more then one of them. And I dont even know how much the craines the use to scoop up the earth would use but Im sure it is around the same ball park.
If we feel like were getting the shaft I feel for all who drives a diesel or uses some for of diesel powered engine to make a living. Hell even cars that are supposed to run on diesel coming out that gets like 40 mpg, if you factor in the price diff your not going to save anything.
When you think of diesel most think of OTR trucks. You have almost every form of construction equipment runs on diesel. All your trains, most ocean liners and yahts all run on diesel and these dont get 2 miles to the gallon. So I would really think that diesel is up in price because more of it is being used and thats where the big oil companies are making a real killing. So why bring that price down amost everything that uses that fuel has to there is NO other option for it so they will have to pay no matter what the price and we as consumers end up paying more for our stuff in the long run. IMO of course.
And yes there are 2 different types of diesel other then winter and summer blend. You also have non highway use diesel which is slightly cheaper. When I worked construction our bosses made us use it in all or vechiles including our PU's because it was cheaper but hell on the enviroment. But in either case they both cost a butt load more money then Gasoline right now and its the most used fuel.