To illustrate my post above...

The two yellow-highlighted figures are the instances when I reset my average speed and average FC meters after re-fueling and before starting the engine.



Compared to my historical data, the two figures are showing a faster speed, but higher fuel consumption.

I thought something went wrong with my gauges/meters after I brought my M3 to casa for its 6th month-PMS. I even thought the faster speed/higher FC is because they rotated the tires (with just less than 4,000 km worth of wear on them).

I guess I'll have to stick to my "usual" method of resetting my gauges/meters after starting the engine for consistency's sake...