Yay! Post #1000!! Almost feels as good as getting a 1000 mile tank.
As a local pedant correctly pointed out, improving FE from 60mpg to 70mpg is only saving ~0.2381 gallons per 100 miles, which is the same as improving FE from 20mpg to 21mpg. Yes, that is true, but I believe that simplifies it too much.
With a 16 gal tank, for me the improvement means a 'free' trip to South Lake Tahoe or to Napa Valley each tank (not counting the gambling or the wine
). For someone that improves from 20mpg to 21mpg it might mean an extra trip to the local shopping mall (assuming the same tank size). For me, it means I can get to St. Louis with only 2 fillups (2,146 miles one way) rather than needing 3. For someone improving from 20 to 21, it makes no difference... 7 fillups either way.
And of course there are the bragging rights. Even though the savings are the same, telling someone that I have improved from 20 to 21mpg simply does not have the same impact as telling someone I have improved from 60 to 70mpg.
OK, done rationalizing the desire to mod for FE. I am fully aware it's not a money-maker, but it is a lot of fun!
