Analysis of information sources in references of the Wikipedia article "Gallon" in English language version.
In 2008—the most recent year where WTI crude oil averaged US$100 per barrel—ANGLEC paid an average of about US$4 per imperial gallon (imp gal) for diesel.
The legal units of measurement ... for economic, public health, public safety or administrative purposes ... litre
In 2008—the most recent year where WTI crude oil averaged US$100 per barrel—ANGLEC paid an average of about US$4 per imperial gallon (imp gal) for diesel.