I have found the solution.


I returned home from CT today with the borrowed S-10. It's got about the same power as a 240D and uphills in 5th are not happening without significant loss of speed.

So, I decide to draft behind a trailer. Stayed at about 30' for about 30 miles. Good draft on the truck at that distance and fuel consumption was significantly reduced. Furthermore, I could easily go 65 with him.

But, the absolute best result:

NO TAILGATERS...............!!