John Soule, Sr. Product Manager, Michelin talks about the differences the air in your tires (known as PSI) and how it affects your cars miles per gallon (MPG).

Soule took the time to show me that you can have an 8psi difference in your tires and not have it register in your tire pressure monitor system. That 8 psi difference, we calculated, was worth one extra mile per gallon on our Ford Escape hybrid.

Basically, Soule must agree with Senator Obama – keep your tires inflated at the correct psi and you will save the nation a lot of gasoline.