[thackney]

Thus, the price of a barrel went down just shy of 75%. Why has the price per gallon not got down about 75%?

Because the taxes didn't fall 75%. The cost to refine didn't fall 75%. The cost to distribute and market didn't fall 75%.

The price of gasoline doesn't rise as much as oil, and it doesn't fall as much either.

[Enlightened1]

Wait a minute the TAXES and the cost of REFINEMENT is a PERCENTAGE per barrel and not a adjustable rate.

The only logical conclusion I can come up with is the depreciation of the dollar since the Fed is adding 85 Billion in NEW DOLLARS every month.

[Enlightened1]

Here is a longer chart and ends in 2011, but at least you can get an idea of the timeline.