I'll be doing mine next weekend. I will be driving from Raleigh, NC to NYC.
Although I do not rev it high (I let it shift normally), the first 3 hours are steady at 80-85 MPH.
I will put in 2 bottles of fuel injector cleaner on the first tank, that should do some cleaning.
An oil change when I get there will be in order.
I am due for one (2700 miles ago).
1999 Porsche 996 Carrera Convertible
1994 420E - SOLD
1986 300E - SOLD, what a car