Speaking of the opening credits, it was shot at a very specific moment in time when gasoline, which had been well into the dollar-something-a-gallon range for several years, suddenly experienced a drop in price and for a very short time, maybe a few weeks, gas across the country was sub-a-dollar a gallon before going back up and eventually into the stratosphere, never to return.
In the sequence, as Tony is driving back home to Jersey, he passes a Sunoco or a Texaco or something, and the price on the sign is ninety-something cents, so that specific point in time is captured for posterity.