you are just kidding yourself if you think that will do any good. Its been tried before and nothing at all happened to gas prices. Big oil companies could care less what we the consumer think -- they can charge anything they want and we are stupid enough to pay it. $3.00 per gallon is nothing compared to european prices. Last time I heard it was over $10.00/gallon in UK.
Not just that, but they have precious little control over the price...
The vast majority is made up of taxes and fixed cost (purchase price, recovering investment in refineries, transport cost, salaries of workers, etc.)
Out of the $7.50 equivalent that gas costs in Europe (per gallon) only about $0.50 is theoretically profit, and that's taxable as well at 45%. So the company makes a grand total of $0.25 per gallon, which is shared between the oil company and the gas station.
It might hurt the government if it went on a long time (weeks or months) and people used non-taxed alternative transport (so not trains and busses, which wouldn't survive the overload anyway), but that would drive the small franchise holders who run most gasstations out of business who need to survive on a few cents per gallon times a few thousand a day (at most) but especially on all the other stuff the drivers purchase in their shops (drinks, newspapers, candy, cigarettes, etc.).
The oil companies themselves would hurt as well, but their main source of income is other products anyway (industrial lubricants, aircraft and heavy fuels, industrial chemicals, etc. etc.).
So as usual with these ill-thought-out leftist plans it hurts only the little guy, the guy they claim to want to help.