If the service inflates the tyres to the number in the book or door sticker and there is a problem later, they are safe. The pressure they used can not be said to be too high or too low since it is what the guys who make the cars say is right (safe) for the car. Even the tyre manufacturers say to use what is on the sticker.
Agreed!
This is easy. Use the pressures specified on the door edge or door jam as per the vehicle mfr. It there is a crash, you can be sure that there will be trial lawyer’s investigators at your door asking questions. You do not want to be the sacrificial goat, so to speak. If pressures other than standard are important to the customer, then he/she can adjust then at home; down is easy and up is almost as easy with an inexpensive 12 volt pump. One of mine was less than 10 bucks.
I always check the sidewalls for max psi and run pressures up to within 3 lbs of max.
All car manufacturers and tyre companies and the US government say the same thing. Use what is on the sticker. Do you really think they are all playing games, or maybe they have done some real testing and have it figured out.
This is sponsored by a tyre manufacturer Bridgstone - Firestone and instructs the reader to check the owner’s manual for the correct tyre pressure.
Here is another from the Goodyear site.
Check Your Air Pressure
Keep your tires properly inflated and you could improve gas mileage by more than $1.50 every time you fill your tank. The recommended tire pressure for your vehicle is located on a sticker inside your driver-side door or noted in your owner’s manual.
You might also try the US Department of transportation.
http://www.nhtsa.gov/cars/problems/E...intenances.htm
They say:
You can find the correct tire pressure for your tow vehicle in the owner?s manual or on the tire information placard.