Does anyone know how the car actually calculates that MPG displayed? Is it a computer simulation of some sort or is it actually measuring fuel flow and calculating mpg directly with real data?

Also, I didn't notice it until someone else mentioned it in another thread, but I do see that it only changes in .3 or .4 mpg resolution. What's up with that? If this is a metric conversion issue, then does the metric version really only do whole miles per liter with no decimals?

 

I use the MPG display as a best guess as with my car it's off by as much as 10% on some tanks as opposed to at the pump MPG. I personally don't worry about .3 or .4 mpg but then that's just me.Kevin

 

I think it does somethink like calculate mileage in L/100km or something then converts the metric (with a resolution of .1) to mpg. This is why it always jumps by .3 or .4.

BTW, what do Europians call mileage since they don't use miles? Do they call it kilometerage?

 

We just call it fuel consumption since we don't measure distance travelled on an amount of fuel (like Japan) so it's not kilometerage, although people will still say 'mileage' even though they aren't talking about MPG.