Just going to throw this out there that I've been looking into the consumption reports and also agree it's affecting the tank mileage calculation. What I figured out.. by throwing the live data on the android auto display via Car Scanner app, and setting the consumption unit to Litres per hour I took a look at the idling consumption and noticed 0.7l per hr on the dash, 0.9l per hr on the ODB.. So I had a call with China and showed them this, I then asked which Gallon they are considering in the calculation, they seemed a little surprised to hear there is two versions of a Gallon. The UK version being swollen my 20% over the clearly calculated US version. So then our brains all start reverse calculating a 20% larger gallon throwing the maths out..
Anyway, in short the CEO and chief software engineer are aware now. I've said this is a big one and they need to pickup the option change when we do our unit set..US or UK Imperial and get it into future firmware pronto!. Let you know when it's done.. you're welcome