Fuel Economy Update for December - Achieving Combined MPG Requires the Improbable - 2015 BMW M235i


Fuel Economy Update for December - Achieving Combined MPG Requires the Improbable - 2015 BMW M235i Convertible Long-Term Road Test
Edmunds conducts a long-term test of a 2015 BMW M235i and tallies up its fuel economy for the month of December.
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Mine: 1995 318ti Club Sport-2020 C43-2021 Sahara 4xe-1996 Speed Triple Challenge Cup Replica
Wife's: 2015 X1 xDrive28i
Son's: 2018 330i xDrive
I think my worse was around 24 and my best was 32 at fill ups since March 2015.
miles driven divided by gallons pumped in will give you the true answer.
the dashboard mpg average overshoots reality on every vehicle i've ever tried
According to my logbook, my best was in August @ 367 miles with a 13.5 gallon fillup (tank is only 13.7 gallons supposedly) which is 27.2 mpg. That was on OEM tires and the roof down a lot.
301 miles 11.49 gal = 26.2mps
190 miles 10.xx gal = 19mpg (most of these trips were ~2 miles long)
220 miles 11.8 gal = 18.6mpg (most of these trips were ~2 miles long)
275 miles 11.3 gal =24.3mpg
winter tire:
273 miles 11.55 gal = 23.6mpg
272 miles 11.14 gal =24.4mpg
225 miles 9.68 gal = 23.2mpg
average = 22.8mpg. But thats missing ~1000 miles of records.
If I get rid of the 2 records where I drove nothing but 2 mile trips, my average is 24.4. Trip computer from day one says 23.7mpg