Honda has gone to a maintenance system similar to what BMW, MB, and most other high end marques have used for a few years now. The 2003 Acura TL was the first Honda to use it, and now all Acuras have it, as well as Accords.

For a while, it's been no secret that the old attage that you MUST change your oil every 3 months/3k miles or at a preset time/mileage is a waste of time, money, and oil. Today's engines can go longer than that with regular oil, depending on the conditions. The only thing was you couldn't really tell what those "conditions" were, untill now. The new maintenance minder computers actually sample the viscosity and level of dirt in the oil, and can tell you when it's time to change it. It all depends on where, when, and how you drive. Sometimes the reminder will tell you it's time to change it after 3k miles. Others, it may go for 5, 7, or even 10k miles before it's time to change.

Inside the engine, there are sensors which constantly sample the oil. When it senses the oil is breaking down it's viscosity, getting dirty, or both, it will first flash to change the oil soon, and then change oil now. When you change it, reset the computer. I have heard that it's a very good system when used as intended (my friend has a 2002 BMW 325i with about 60k miles on it, and sometimes the computer doesn't tell him to change the oil untill 15k.... and the engine is still smooth and sweet, no problems).

Couple of other things..... your belt change should still be around 100k. It's the same engine archetecture that your '01 Accord has.

Secondly, Honda now uses 5w-20 oil for this engine. I recomend sticking with it. Improves fuel economy, power, and still provides the proper lubrication for this engine.

If you really want to stick with your 3k mile oil change interval, it won't hurt anything but your wallet.