[lostlogin]

> 2 grams per gallon

I’m from a fully metric land, is the above a common way to express a ratio? It certainly stuck out to me but it’s a pretty tidy measure.

[alethiophile]

Gas in the US (aviation or automotive) is always sold in gallons, but quantity of chemicals (outside of cooking) usually done in grams/kilograms. Thus, grams per gallon is fairly intuitive in context.

[jjoonathan]

Hey, it doesn't even have internal unit cancellation or convention ambiguity like "kilowatt hours per month". We can do worse!