Mithra, good information! What you said at the end weighs heavily with me. Even before the Explorer/Firestone fiasco I always wondered what agenda the manufacturers had in mind when coming up with tire pressure recommendations.
I typically add at least 4 psi to the auto manufacturer's recommendations for tire pressure - up to the tire manufacturer's max recommendation. This is because in all my years of maintaining cars I have yet to experience an overinflation wear pattern, yet I often had tires with an underinflation wear pattern.
BTW, I too am part of the 401 crowd.
95 E320 Cabriolet, 131K