Answer
The claim is more than reasonable.
Work Step by Step
Trying to figure out if it is a reasonable claim
- 20lbm every gallon it burns
- Wants to get 25 miles per gallon rather than 20
- That will prevent 10 tons of carbon dioxide being released
10 tons = 22046.2 pounds
The average mileage of a car = 200,000 miles
This equals 8,000 gallons with 25mpg
This equals 10,000 gallons with 20mpg
Extra 2000 gallons = 40 000lb = 18 tonnes
Therefore:
It is actually better than a reasonable claim with cars now reaching over 200’000 miles. If it was 10 years ago, then the switch may not be worth it, but in recent times, a car with 25mpg will prevent ~18 tonnes of carbon dioxide being released into the atmosphere.
