Did you replace the oil filter as well? Many vehicles will take a little less because there is oil still trapped in places where it would take a long time to drain from. Give it a day or two and recheck your levels and you should be okay.
I hear ya on the 3K rule, Dirty oil is dirty oil!Anyone know if changing your oil voids any kind of warranty? Ford recommends an oil change for my 2013 5.0 every 7500 but I've always been a 3k guy. Any help would be appreciated.