so im making my way back to florida tomorow. i was wondering what would i be better off doing as far as gas is concernd


should i go at a higher rate(80-90) for a shortewr amount of time (takes less time to get there at a higher speed)

or

go slower at less of a rpm and take more time?

whatever would yeild better mpg is what im looking for

any intelligent anwsers will be rewarded