I have to take back what I said about the 35 psi... about four weeks ago I noticed that my left front tire would always become underinflated after only 3 or 4 days. Then, two weeks ago, while I was about to head home from the cafe, I heard a loud hissing sound and I immediately knew I had to pull over and check the tires.
After I had put the spare tire on, I found this crack in the Dunlop EC201 that I replaced:
I had the cracked tire replaced with a Michelin Vanpix, but the tire technician recommended that I only load 32 psi in it instead of my usual 35 psi, since I do mostly highway driving, and since the Starex is a heavy vehicle.
Anyway, I'll see in a few months time if the Vanpix fares better than the Dunlops.