A 42-gallon barrel of oil makes about 19.5 gallons of gasoline. If we waste 3.56 million gallons of gas a day due to tire inflation, then that equates to about 183,000 bbls of oil, a far cry from 4 million.
I wonder how much gas is wasted sitting in traffic? I am sure it is much, much more.
AND 183,000 divided by 20,000,000 is .9% PERCENT!