In addition to excise taxes, the following are the primary factors that influence diesel gas prices:
Cost and supply of crude oil: Crude oil prices are determined by simple supply and demand on a global basis, and over the past few years soaring demand has put intense pressure on available supplies. The Organization of Petroleum Exporting Countries (OPEC) has significant weight on diesel prices because they get to place an upper limit on what its members are allowed to produce and OPEC account for about 40% of the crude oil generated on the planet, they also possess pretty much all of the spare production capacity, and possess over 60% of the world’s estimated crude oil reserves. Prices soar as a reaction to disruptions in the global and domestic availability of crude oil, such as the Arab oil embargo in 1973, the Iran/Iraq war in 1980, today’s hostilities in Iraq, turmoil in the Niger River delta region of Nigeria, and the hurricanes in the Gulf of Mexico in 2005.
Refineries in the United States have been performing at above 90% capacity over the last ten years. Of course, America hasn’t opened any new refinery in the last 30 years or so and that would create undo pressure on existing facilities Most other countries rely even more heavily on distillates and diesel for overall transportation than does America, and refining capacity is stretched tight worldwide. U.S. diesel fuel prices are increasingly impacted by competing international demand for refined distillates.

So while diesel price remain high and go higher, some innovative folks have found a way to reduce gasoline consumption and thereby achieve great savings while also reducing the toxicity of their car’s emissions and helping their cars to run more optimumly, quieter and smoother.
The concept of using compressed air as a fuel source can, for example, also be utilized in a hybrid vehicle, with cylinders functioning on compressed air with an additional battery working on electricity, generating a vehicle propelled by only electrical-pneumatic propulsion.

In case you are not familiar, it's true, safely extracting Hydrogen from water to generate a source of fuel is already here as a workable technology that we can access right now. Fascinatingly, it is not even a new technology, really; its just recently been designed better so that we can use it.
I said that I would tell you more about the Water4Gas system.
WATER4GAS is offering information for a nominal fee which individuals can use at home to put together a small gizmo which infuses hydrogen into the gasoline/air mixture that their car runs on.
The process makes bite sized particles out of the ones that the system burns as fuel. So it gets to use much more of it.
With WATER4GAS you can reasonably expect to increase your gasoline mileage by thirty to fifty percent or even more. Those particles "musta" been pretty "blankin'" huge in some engines before. But with W4G they are made usable so you can increase your gasoline mileage.
It also helps to lower emissions significantly.
This information has been purchased by over 9000 car owners already and happy members number about 99%! So how about you?