Fuel Economy - What do you get out of a tank? (3rd gens only)

[mjd26]

I'll drop more 98 in over the next 2-3 fills to see if there is a true difference.

Long standing opinion says no.
I also did dyno testing on Ultimate 98 with octane booster versus standard 91, absolutely no difference.

[Linz]

back then i had a stock TJ 3.5 and used to get 300 km's on gas. drove her pretty hard. But hey if i wanted to save money on fuel i would have bought a bloody barina!