I know that I never fill up until the readout constantly reads 12-14 miles before I run out. At 117,000 miles, still running the original fuel pump, if it dies, my opinion will be that it died of old age, having lived a long, giving and 93 octane life,

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas