I've heard why Gas goes up and why gas goes down, but even when oil prices go down gas prices rise.......is this the answer?

Gas prices rise when oil prices rise, and fall when oil prices fall — except when they don't. What you pay at your gas station depends on an array of factors, from what happens on an exchange in New York to what the competition is charging.

This can rankle drivers, especially these days. Gas reached a national average of $3.51 a gallon on Monday. That's up 14 cents, or 4 percent, over the past week. The week before, the average rose 20 cents, the steepest increase since September 2008.

A year ago, the price was $2.75. The average is the highest it's ever been this time of year, and analysts expect it to climb higher in the coming weeks. (AP)