Sorry to be a killjoy, but I don't believe you can calculate with any real accuracy for that small of a sample. Sure, the odometer may be that accurate, but how do you measure fuel? Certainly one pump could click off sooner when fueling. That could make a difference of a couple litres.

Typically, you'd want to calculate over three or more tankfulls. This would cancell out pump differences, but would give you a combined fuel economy / consumption.





Quote Originally Posted by Elusivellama View Post
Just pulled off 7.6L/100 km (pump measured), 98km trip all highway, done as part of an out of town trip and as an experiment.

2010 MS3

pluses:
- drove between 100 and 105, sometimes 110
- cruise off, fan off, radio on
- no sudden accel or boost
- SRI possibly improves air intake efficiency
- did not drive behind anyone for much of the trip so slipstreaming is not a factor

minuses:
- winter gas
- minus 11 C
- winter tires
- RA mudflaps create drag
- driving soooo slowly

Interesting experiment but hardly scientific. Still pleased with the result.