>> "Which saves more gasoline, going from 10 to 20 mpg, or going from 33 to 50 mpg"
I'm surprised such questions come up often. Usually a current vehicle gets x MPG and a new one might get y. We use l/100 km in Canada. I think the primary advantage is it relatively easy to compute number of liters needed on a longer trip. It isn't super important however - better just to fill up!
PS
I was mostly kidding about using MPJ. The numbers would be tiny and hard to make sense of.
I'm surprised such questions come up often. Usually a current vehicle gets x MPG and a new one might get y. We use l/100 km in Canada. I think the primary advantage is it relatively easy to compute number of liters needed on a longer trip. It isn't super important however - better just to fill up!
PS I was mostly kidding about using MPJ. The numbers would be tiny and hard to make sense of.