Two options here. Drive the old state routes which are mostly 4 lanes and deserted once you get out of the metropolitan areas. Second is drive the Interstate and look for a big rig that is doing the speed limit. Drop in behind them at 150 feet separation and just keep an eagle eye for gators (pieces of tire tread). Traffic will flow past you nicely, they don't want to mess with the big rig, and you can average the same MPG as you would alone at 55, while averaging 65-70.
The best trip mileage I ever got in my VX (now gone) was 300 miles on 4.627 gallons of gas in the early summer of 2008. 64 MPH in the right lane of I64 west and I95 north from Williamsburg to Chantilly (near Dulles airport) and back. On the return trip there were 12 big rigs drafting each other in the right lane at night.
The car had it's ORIGINAL 15 YEAR OLD Bridgestone tires, which I replaced soon after, and never got that mileage again. I did not want to risk having one come apart and trashing the bodywork that had just been finished. The car was totalled in 1995 and I bought it and rebuilt it in March 2008. It had 27,492 original miles on the odometer and sat in an insurance training institute from 1995 until I bought it in 2008.
regards
Mech
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