Maintaining the manufacturer's recommended pressure in your car's tires
ensures proper tread wear, better fuel efficiency, and safe driving (as
evidenced by the recent Firestone/Bridgestone tire recall). In fact,
a Bridgestone/Firestone brochure encourages tire customers to "Inflate.
Rotate. Evaluate." This manufacturer claims that "tires can lose
one psi (pound per square inch) per month under normal conditions.
Additionally, tires can lose 1 psi for every 10 F temperature drop." Use
your knowledge of physics to investigate these claims.