In the US (and I suppose other places where distances are still measured in miles) the term is mileage. But what about the rest of the world? Is there an SI term for mileage? Or is mileage still the term used in English speaking countries – but without the implication of the units of the distance.
For the Netherlands:
What's the milage on the timing belt?
I never heard a dedicated word for this. Just 'How much has the car driven?' [since it left the factory]'. Or 'How much has the car driven since replacing the belt?'
Personally I tend to use mileage. But I do tend to mix rather more foreign words into my language than is the norm. Kilometrage would also be understood but I never heard that actually used.
As for the answers which read the question as fuel usage, that would have been easy to answer: 'verbruik'. ('Usage') E.g. 'Het verbruik is 1:18'.
How that is used might be a fun question on it own for this site. :)
Here's one answer. keeping in mind that Australia also speaks "Queen's English". It really is up to whoever is saying it at that moment. I've seen them say "miles per gallon of petrol" on Top Gear. Miles and gallons are both US measurements and "petrol" is the European term for gas... And that a BBC TV show! Lol!
So really it doesn't matter officially and to my understanding there is no current SI term for it.
In countries that don't use the metric state gas mileage in miles per gallon. In metric countries they use liters per 100 kilometers written as L/100 Km. Similarly speed limits in metric countries are given in kilometer per hour written as Km/h.
Imperial Gallons are 1.25 times larger than U.S Gallons. There are 4.54 liters in a Imperial Gallon and about 3.6 Liters in a U.S Gallon.
1.609 Km = 1 Mile.
One thing I like about the metric system while driving it seems faster.
60 MPH = 96 KM/h 100 MPH = 160 Km/h
I believe the technical term you are looking for is known as the Odometer Reading.
The Odometer refers to the indicator in the car which displays the total distance that vehicle has traveled.