To calculate the difference in annual gas costs for two cars that travel 450 miles a week, one getting 20 miles per gallon (mpg) and the other getting 40 mpg, we will use the current average gas price.

As of the latest information, the average price for a gallon of regular gasoline is approximately $3.26 source.

Calculation for Car A (20 mpg):

1. Weekly Mileage: 450 miles
2. Miles per Gallon: 20 mpg
3. Gallons Used Per Week: 450 miles / 20 mpg = 22.5 gallons
4. Weekly Fuel Cost: 22.5 gallons * $3.26 = $73.35
5. Annual Fuel Cost: $73.35 * 52 weeks = $3,817.80

Calculation for Car B (40 mpg):

1. Weekly Mileage: 450 miles
2. Miles per Gallon: 40 mpg
3. Gallons Used Per Week: 450 miles / 40 mpg = 11.25 gallons
4. Weekly Fuel Cost: 11.25 gallons * $3.26 = $36.68
5. Annual Fuel Cost: $36.68 * 52 weeks = $1,909.36

Difference in Annual Gas Costs:

• Car A Annual Cost: $3,817.80
• Car B Annual Cost: $1,909.36
• Difference: $3,817.80 - $1,909.36 = $1,908.44

Thus, the difference in gas costs per year between the two cars is approximately $1,908.44, with the less fuel-efficient car costing significantly more to operate over the course of a year.

Sources

US Retail Gas Price (I:USRGP) - YChartsToday's Highest Gas Prices By State – Forbes AdvisorGasoline and Diesel Fuel Update - U.S. Energy Information ... - EIAUS Average Regular Gas Price Comparison by State - GasBuddyAverage gas prices by state: What Americans are paying to pumpU.S. All Grades All Formulations Retail Gasoline Prices (Dollars per ...Live Ticking Average of Fuel Pump Prices - Search by State or ...

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