When oil minder tells me it's time. I've been doing that with my Accord - would be once a year or 10k miles. Engine still runs great - no leaks after 70k miles.
I am just correcting Hellrazer. The sticker on door jam says just that. 30 PSI for Front/Rear and 38 PSI for Spare. I always go by the door no matter what brand/tires I get.