Middle of the night. Interstate only, no other traffic. I didn't touch the brake between two fuel stops - coasted in and out both times - about 2 hours apart.
Never exceeded 60mph and took ~20 seconds to get there. I got 37 mpg.

I'm sure it would NOT have been possible to drive like that in normal traffic.

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1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine)
Raleigh NC - Home of deep fried sushi!