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I've gotten into the habit of entering fuel fills into my app each visit for the past 2 years. My wife wouldn't care less about keeping stats so I'm doing all the refuelling on the X1 for now.
Average consumption went down from 9.6 to 9.0L/100km (onboard computer) after my ~300km highway drive (speed limit 110km/h, cruise control set to 115 allowing for speedo inaccuracy of 3km/h). I reset the trip computer on the journey home, and saw 6.1 after the highway cruise with minimal traffic, on Eco Pro mode. After driving through suburban roads to get home it's at 6.3.
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