Longer charging times don't make any difference. Preconditioning does if you use the aircon. I live in the mountains and when I leave my house in either direction I'm faced with hills, and like the kid who walked to school in the snow, uphill both ways, since I live in a valley I have to go uphill, both ways when I leave my house. The hills are real mileage killers. But I once got 21.7 miles on electric only. I wrote about it on Easter Sunday.
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Previously: 2014 i8; 2013 650i convertible; 2013 650i Gran Coupe; 2013 X1; 2010 550i GT; 2010 535 GT; 2010 Z4 3.5; 2008 535ixt; 2007 M6 convertible; 2006 650i convertible; 1996 Z3; 1980 633CSi; 1978 630CS; 1972 3.0CS; 1971 Bavaria. (1971; 1979-2005 & 2017 - ? -- the Mercedes years.)
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