Ed has it right. Most of the replies did not address the OP question or "optimum"The door sticker recommendation is the best all-around pressure for safety, steering response and tire life. If you deviate much from this recommendation you are compromising one for another. Ed
Ed has it right. Most of the replies did not address the OP question or "optimum"
"Optimum" is what the door jam says. It's not the 'optimum' for wear, not the 'optimum' for mileage, not the 'optimum' for handling, not the 'optimum' for best ride, Bbut it is the optimum to get the best combination and trade-off all three.
I am 5 years a member on this site now, and I can't believe that this is still a common issue with Mazda's.Stumbled onto this thread and decided to check the tire pressure on my newly bought CX-5. On a cold morning, after the car's been sitting all night.. All 4 tires measured ~55 psi!!
Double checked on my air compressor readout and it measured the same. My mistake for trusting the dealership would properly check the tire pressure before delivering the car to me. Haven't really driven it much yet, and it's a good thing I haven't!
I am 5 years a member on this site now, and I can't believe that this is still a common issue with Mazda's.
It continues to be a problem, and Mazda dealers just can't seem to get this right. Sheesh.
Probably another 3 lbs. or so. Depends on the ambient temp when the cold pressure was set....who knows what the 90+ degree weather can do to the air pressure in the tires when it's hot enough to fry an egg on asphalt outside.
His rationale, though, is because its safe. I think that's a premise most here already understand. And the rest of his rationale is because of the control limits associated with the TPMS system.The Autopian just put out an article regarding tire pressure and the author advocates for sticking with the pressure recommended by the car manufacturer.
Why Automakers Sometimes Overpressurize Tires And How That Can Affect Your Handling: Ask An Engineer
It should be noted that the article is written by Huibert Mees, an engineer with a rather impressive resume.