Arguably the greatest economic boom period of the 20th Century, the period between 1986 and 2000, was fueled, quite literally, by the cheapest gasoline prices on an inflation-adjusted basis since the end of The Great War. Real gas prices during those years in today's dollars ran down from $2.00 a gallon in the mid 1980s to $1.50 by the late 1990s and up again.
Chart and discussion, here.
Say what you will about former Speaker of the House Newt Gingrich's presidential run in 2011-2012, he's the only public figure who has had the vision to understand the imperative of getting the price of gasoline below $2.50 a gallon to gun the economy.
With four more years of a regime which is the enemy of all things fossil fuel, expect little more than idling in the driveway.