I would say low teens, as long as the pace was a steady 130mph.

FWIW - I averaged ~17.5 MPG in my E55 over 400 miles, with an average speed of 125mph.

__________________
-Justin

91 560 SEC AMG - other dogs dd
01 Honda S2000 - dogs dd
07 MB ML320 CDI - dd
16 Lexus IS250 - wifes dd

it's automatic.