Miles? Gallons?
 

An user option for switching to the metric system would be great. (also, more cars)

Yeah. Would you want the data presented in km per liter or L per 100km?

I'm kind of ignorant of the metric units people in other countries are used to seeing.

Car specs and data are L/100km in Canada. Even though I never really got the hang of it, it would be the most correct way to do it.

If you do add it, and I hope you do, I face a bit of a conundrum: I'm in Canada so I buy my gas in litres, but I bought my car in the US so its odometer is in miles.

In Europe car specs are in l/100km too (which gives nice little numbers to publish on brochures), but I think km/l is more useful - most people use that for reference, actually.

l/100km makes more sense because the numbers are mon manageable.

9.8l/100km, instead of 0.098l/km (or something, math may be off, but you get the idea)

Also, I've personally never seen anyone (here in Canada anyway) refer to km/l, always l/100km

(need an edit comment button)