...and of course as an added wrinkle we don't actually measure fuel consumption performance in km/L. It's "L/100km"; on Google you can enter in something like:

50 miles per gallon in L/100km

...and get back...

50 miles per gallon = 4.70429169 L/100km

Or in my case as an example, my best ever trip I averaged 4.0L/100km on a 600km summer trip (from Ottawa to Kingston and back), average speed of 80km/h:

4.0 L/100km in miles per US gallon

...gives me...

4.0 L/100km = 58.8036461 miles per US gallon

So, all that is my long-winded way of saying, until Jason has the time iron out the bugs, those of us using other units can do the calculations via Google.

Great place you have here, Jason!

Andrew.