Deisel is not so much that its made from "left overs", its petrol thats LESS refined. So, less costly to make. You still have to manufacture deilsel. leftover or not. It has a cost.
The rippoff comes in, like many here explained, is its lower demand, so more cost to distrubute. Buut, I suspect theres some scam affect here. Deisel affords 30-40% more gas mileage, so its huge as far as economical usage. Only thing- engines cost more.
US is in the dark ages still with deisel- Europe has it together in this department- no contest. The people here havre no one else to blame but their own ignorance.
Alexander Pope: [a little knowledge can be a dangerous thing]