I put the Accord up on ramps when tonight when I got home from work. No new oil leaking, just what looked like residual oil that I didn't get cleaned up on Saturday. To satisfy my mind,I checked all the torque of the oil pan bolts and oil filter mount, all was well. I can only conclude (and hope!) that in fact it was the filter. There had been no burnt oil smell or anything, therefore there was no oil leaking down from the engine to burn off.