petrol cost per gallon 2016
âU.S. regular gasoline retail prices, which averaged $3.36 per gallon in 2014, [will] average $2.43 per gallon in 2015 and $2.63 per gallon in 2016,â said the EIA. âThe average household is expected to spend $675 less for gasoline in 2015 compared with last year because of lower prices.â.