For all newer cars and trucks (from the 90's to present day), you're completely safe changing your oil between 5,000 and 7,000 miles. The "3000 miles between oil changes" thing was the standard years ago with much older cars. But engines and synthetic oils are so much more advanced these days, you can easily double your oil's longevity. I've been doing this with my '99 Corolla since I've owned it. Never had a problem, still purrs like a kitten.
Every 110,000 miles on the V6 and never on the 4 cylinder.
On the V6 change it when you change the cam belt. On the 4 cylinder which has a cam chain change it when you have a leak or it fails.
Change it every 100,000 miles on the 4 cylinder and change it at 105,000 miles on the V6 at the same time you have the cam belt and water pump replaced.
15000 miles
Honda recommends @ 45k miles and then every 30k miles after that.
I recommend every 75,000 miles.
Honda recommends changing it at 100,000 miles. I personally recommend you change it every 75,000 miles. The 2003 Honda Accord had problems with the transmission so I would recommend this as a preventative measure.
Change it every 5 years or 60,000 miles whichever come first.
I don't know about 2006, in the 2001 it's at 105k miles
Every 50,000 miles or 5 years. Read your owners manual maintenance schedule.
Change it every time you change your oil, 3 months or 3000 miles. Every 40,000km. More often under dusty conditions.
Honda recommends every 100,000 miles.