[puddleglum]

Generally I would agree with you Thymeclock. I wouldn't recommend it or thought it necessary, but it works for this application. (maybe only this one) I drive a 3500 Savanna van for work that calls for 80psi rear and 65psi front. I simply don't have enough weight in this van to require these pressures and reducing the pressure has not hurt the mileage. Keep in mind that mileage is a non issue for me with this van and it's always bad anyway. The point that I was trying to make is that the ideal tire pressure for max. tire wear and longevity is not ALWAYS going to be max. sidewall pressure like many are saying. It may not be the pressure that gives the best FE either. Even tire wear is going to happen when the pressure is matched to the load on the tire so that all the tread has even contact with the ground. This may not give the best FE on a large tire. I have always run my tires a little over recommend psi on my cars (probably always will) and generally with good results. But, I think it's wrong to say that it will always make the tires last longer.