Willies clips are so fact free, your brain can starve to death reading them.

Fuel Economy Gov (a site maintained by a Republican led goverment: 3.3%

You can improve
your gas mileage by around 3.3 percent by keeping your tires inflated
to the proper pressure. Under-inflated tires can lower gas mileage
by 0.4 percent for every 1 psi drop in pressure of all four tires.
Properly inflated tires are safer and last longer.

U.S. Department of Transportation (August 2001, Bush took office in January of the same year):


Fully
27 percent of passenger cars on U.S. roadways are dr...

Willies clips are so fact free, your brain can starve to death reading them.

Fuel Economy Gov (a site maintained by a Republican led goverment: 3.3%

You can improve
your gas mileage by around 3.3 percent by keeping your tires inflated
to the proper pressure. Under-inflated tires can lower gas mileage
by 0.4 percent for every 1 psi drop in pressure of all four tires.
Properly inflated tires are safer and last longer.

U.S. Department of Transportation (August 2001, Bush took office in January of the same year):


Fully
27 percent of passenger cars on U.S. roadways are driven with one or more
substantially under-inflated tires, according to a major survey conducted by the
U.S. Department of Transportation’s National Highway Traffic Safety
Administration (NHTSA). Moreover,
32 percent of light trucks (including sport utility vehicles, vans and pickup
trucks) are driven with one or more substantially under-inflated tires,
according to the first study of its kind to be conducted by the government in
two decades. Full quote from Obama:

“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.”

Again Fuel Economy.gov says?

Fixing
a car that is noticeably out of tune or has failed an emissions
test can improve its gas mileage by an average of 4 percent, though
results vary based on the kind of repair and how well it is done.

Fixing a serious maintenance problem, such as a fault