I'm wondering what is an acceptable OCI on my girlfriend's 03 Honda Accord. It has the 2.4 4-cyl, and is at 105K on the odometer now. She started a new job a few months ago, which is 4 miles one way from her house, 5 days a week. Grocery store, church, Blockbuster Video, and just about all the other places she goes are within that 4 mile radius too. It's a stop and go trip with half a dozen redlights along the way, in the Florida heat. I searched but can really find anything about it here. I have read before that on short trips like that it's best to change oil more frequently, but at what mileage interval? I have been using Napa brand 5W20 and a ProSelect filter. Honda calls for 5W20 on the 2.4. I appreciate any ideas you have.