From what I've read, the seafoam thins your oil out so you probably don't want to drive 1200 miles on it. Maybe 100 miles.
I've used Lubro Moly engine flush before my oil change and then added motor protect after. It seemed to work pretty well.
2013 F30 328i - Melbourne Red
2011 E90 M3 - Monte Carlo Blue
2004 E46 M3 - Imola red