Talk:Miles per gallon

US/Imperial conversion
this page could also use US MPG to Imperial MPG conversion and its inverse 1.2? (+/-20%)

It would be 0.80 or 1.25, as eighty percent is four-fifths of the total, 100%, while its inverse, five-fourths, is equal to 1.25. Captain Gamma (talk) 17:42, 21 December 2008 (UTC)

Increase in MPG and decrease in L/100 km
Is it me or is the "Increase in MPG and decrease in L/100km" section completely crazy?

I mean...It's just saying some mathematical tautologies (the inverse of a function is not linear in the first function) and using them to get nowhere. "if you double the efficiency of a Hummer H1 you can save 500 gallons in a year, if your mileage is fixed. On the other side if you double the efficiency of a car that consume a glass of gasoline every 100 mile you will end up saving half a glass of gasoline" And so??? I mean....if you half the MPG you double the L/100km. That's all. Is that magic? —Preceding unsigned comment added by 128.141.94.56 (talk) 15:16, 30 June 2009 (UTC)