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X1 S Drive 28i
On trips from Nashville to Knoxville I can get 34-35 MPG round trip by driving between 60-70 MPH.
Overall, I average around 25 because I do lead foot it every now and then.
I just installed the BMS Stage 1 and it does seem to have hurt mileage a little, even though they say it doesnt. But in the most recent tank, I averaged 29.5 with mixed (miostly highway) driving.
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