I've been reading for a while, and there sure is A LOT of information here. I've tried to gather is all into some sort of plan for my Accord V6. I know there's certainly not agreement on this: I'm going to go 7,500 with the factory fill per Honda recommendations. I'm then going to get a dealer oil change using the Honda 5-20w/filter. I'm then thinking I'll switch over to Mobil 1 0-20w and Honda/K&N filter at 8,500. I'll stay with that combination changing every 7,500. I'll do an oil test when the first Mobil 1 comes out. BTW I do mostly freeway driving. Assumptions: 1. Go a 1,000 after the first oil change to clean out left over from factory fill. 2. No point testing factory fill or the oil that's in for 1,000 miles. 3. Honda and K&N have higher flows which is good. 4. Mobil 1 was great in my '91 Accord with 430K miles. Make any sense? Am I crazy?