I try not to let my tank run that low for a couple of reasons:

1) fuel cools the pump, so keep it submerged as much as possible,

b) I never want to be low on fuel when the zombie attack. Gotta get away!

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Kirk
Las Vegas
2016 X5 40e Mineral White/Black Dakota Leather, ZLL, ZCW, ZDA, ZDB, ZPP, multi contour seats, rear side window shades, HK stereo
2011 E90M3, 6-speed manual