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      02-14-2013, 09:07 AM   #4
Curmudgeon and Pedant

floydarogers's Avatar
Drives: 2010 335d, 2014 328d
Join Date: Nov 2012
Location: Bellevue, WA

Posts: 997
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Freeway speeds aren't the best

Driving from Seattle to Pullman (WA State) is about 1/2 freeway, 1/2 2-lane. IME the best mileage is on the slower sections, around 55 mph..

Wind has a lot to do with mileage on that route - at least as much as much as +- 2 mpg.
Kind of hilly, too. Best mileage is usually attained at the lowest spot (after Snoqualmie Pass eastbound).
Best freeway mileage I've seen is Seattle-Portland on I5 - it's pretty flat.