“There are things that you can do individually, though, to save energy,” Obama said in the July 30, 2008, appearance. “Making sure your tires are properly inflated — simple thing. But we could save all the oil that they’re talking about getting off drilling, if everybody was just inflating their tires, and getting regular tune-ups. You could actually save just as much.”
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In April, the Rubber Manufacturers Association, the Auto Club, the California Highway Patrol and Yokohama Tire Company used those statistics, along with Department of Transportation and Automobile Association of America data, to extrapolate that 2.8-billion gallons of gas are lost every year due to under-inflation of tires.
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According to the latest assessment from the Minerals Management Service, the mean estimate of undiscovered technically recoverable crude oil in the Outer Continental Shelf areas that are currently under moratorium is about 18-billion barrels (see here.)
But it couldn’t all be extracted immediately. The agency estimates that if the moratorium were lifted production could start by 2017, and by 2030, oil companies could be producing 2.4-million barrels of oil instead of 2.2-million. That’s 200,000 more barrels per day.
After refining, a barrel of oil can produce up to 19.5 gallons of gasoline, according to the U.S. Department of Energy. So that’s 3.9-million more gallons of gasoline per day, or 1.4-billion gallons of gasoline per year.
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And we didn’t even talk about tune-ups. (Repairing a car that is noticeably out of tune or has failed an emissions test improves gas mileage by 4 percent on average, according to the U.S. Department of Energy. Fixing a more serious problem, such as a bad oxygen sensor, can improve mileage by up to 40 percent, the agency says.)
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For our purposes in evaluating Obama's claim, all the available evidence shows that he's on solid ground in saying that better car and tire maintenance would save as much gasoline as drilling would generate.