"Dad, how do I ...?"I buy fuel in litres but convert this to gallons to calculate fuel consumption in mpg. Mpl seems just wrong and litres per 100km also involves converting one of the metrics between imperial and metric (I felt it was necessary to insert a link explaining the difference between a metric and the metric measurement system..... sorry). Once distance is measured in km and fuel in litres then a natural adoption of the ltr/100km will be inevitable.
"Divide by 4.54608, easy."
I think it's the only conversion factor I know to 5 decimal places.
And litres per 100 km is just wrong, because a good number is a low number, whereas any fule kno that with fuel consumption a good number is a high number.
I'm semi-serious. These things are completely ingrained, and exist in a part of the brain that is very resistant to change.