JanGeo just posted an inspired question in response to my 100+ segment:
He asked how many MPG per pound it worked out to.
What a great question. Speed performance enthusiasts love to talk power to weight ratios. So why wouldn't efficiency performance enthusiasts compare MPG to weight ratios? (Aside from the fact that one ratio is a set of fixed numbers and the second ratio isn't, necessarily...)
FYI, my 3 month (3 tank) average is currently 59.3 (US). The car weighs 1830 lbs.
Edit: instead of the original suggestion of mpg/weight we're going with this formula...
But the number gets higher if your weight is lower. From reading JanGeo's original comment, he was trying to show that you should get more credit for having a heavier car. My immediate thoughjt would be weight/FE, not the other way around.
So in my case, 2200/56.5= 38.94.
But if I were able to get 56.5 MPG in a 3000 lb car, the number would be 53.10, which would give a higher score to someone who did the same with more weight.
I think Metro's number system is better because it increase with fuel economy. The other option makes the number go down and it's confusing. But, we all know it doesn't matter how much your car weighs, it's the MPG that counts.