To know your gas savings when comparing cars, GPM can be subtracted. MPG cannot.
If you are buying a car, use these calculators to see the gas and cost savings of different vehicles:
GPM Calculator
Climate Central

Friday, February 5, 2010

The MPG Illusion among Transportation Professionals

Are transportation experts immune to the MPG Illusion?

In a presentation at the 2010 Transportation Research Board Conference entitled Mile-per-Gallon Illusions and CAFE Distortions: When Even Transport Experts Have Trouble, Dana Rowan, Alex Karner, and Debbie Niemeier of UC Davis report that transportation professionals make better judgments of fuel efficiency gains using "gallons per 100 miles" than using MPG.