I know how you feel. Fortunately for me the wind noise is so great at that speed that I don't notice the engine whinning. The car was built when all the speed limits were still 55 and geared so that it would get the best fuel efficiency at that speed. I won't make a long road trip in mine. If necessary, keep an eye on your temperature and oil level. Change your oil before and after the trip.
You could also try taking highways instead of the interstate.