Is the Error term? Are the ramifications of running your tires at 38 PSI? What is the manufacturer of the tire telling us about running a tire higher or lower than the recommended range?

Your car’s owner’s manual states that the tire pressure should be 32 Pounds Per Square (PSI) Inch + 3 PSI; what:

• Is the range of properly operating tire pressure?
• Is the Error term?
• Are the ramifications of running your tires at 38 PSI?
• What is the manufacturer of the tire telling us about running a tire higher or lower than the recommended range?