Most of the cars or other vehicles in the United States regularly have tanks that can hold up to 12 gallons worth of gas. The price of gas in not consistent. Sometimes prices are high and sometimes prices are low. Just like to day the price of a gallon is worth $2.2. But in an average, gas costs $3.8 per gallons. Therefore, on a regular basis a standard American which can hold 12 gallons costs $46.2.