My parents came to visit and my father couldn't fit in our Honda Civic. His girth makes it necessary for him to drive a behemoth in order to be comfortable. This got me thinking: How many barrels of oil do you think the U.S. would save if we cut our obesity rate in half? I can think of a half dozen ways that being thinner would consume less oil. I'm especially curious to know if carrying around heavier people affects the average car's fuel economy in any meaningful way.
How does the price of crude relate to the price of gasoline? [more inside]