A 15 mpg clunker that travels 12,000 miles a year uses 800 gallons of gas a year.
A 25 mpg vehicle that travels 12,000 miles a year uses 480 gallons a year.
So, the average Cash for Clunkers transaction will reduce US gasoline consumption by 320 gallons per year.
They claim 700,000 clunkers were turned-in, so that's 224 million gallons saved per year.
That equates to a bit over 5 million barrels of oil. 5 million barrels is about 5 hours worth of US consumption.
More importantly, 5 million barrels of oil at $70 per barrel costs about $350 million dollars.
So, the government paid $3 billion of our tax dollars to save $350 million.
We spent $8.57 for every dollar we saved.