3:55 gears to 323 gears

Gas mileage is the worst thing to usually spend your money on.
You have to put crazy miles on your to recoup.

whatever your car gets with a good tune it’s hard to increase by a lot. Even modern midsize cars don’t get the greatest. My V6 avenger only gets 22 mpg mixed driving. Say you put on 2000 miles a summer at 10 mpg at say $3 a gallon that’s $600 a year, even if it was possible to double it to 20 mpg that’s a $300 savings, know how much time and money it would take to double that, say you could with $3000 in upgrades it would take 10 years to break even.

it’s cheaper to usually to just dump it into the tank, now if your upgrading for performance with and eye towards mileage and driveability Then it don’t matter cause your not concerned to recoup just a better experience.