Thank you. The E70 X5 has two separate areas where it will calculate and store mpg data in the iDrive Car Data. They both store Avg Speed and Consumption (MPG). But differ on the other info.

1 - I use the "Onboard Info" to quickly check MPG over short runs e.g. 5-50 miles.

The Onboard Info never exactly matches the MPG per tankful because I haven't let it calculate MPG over a whole tank yet.

2- I use the "Trip Computer" to maintain MPG and other info since delivery.

The Trip Computer Consumption (MPG) has always been very close to the MPGLong calculation from my Fuel Log data. Note: It will never be exact since I zeroed out the Trip Computer at delivery and so it includes some MPG data from the very first tank put in by the dealer. In retrospect I wish I had zeroed the Trip Computer when I filled the tank the first time. That way I would have avoided the very low MPG due to sitting at idle making all the driver's settings etc.. The Trip Computer also tells me the total number of hours we've driven the X5. Just like our Kubota

FWIW I will be updating this thread with new graphs as I collect more data.

Funf Dreisig

p.s. And yes, as JCL points out, the graph is Miles per US Gallon