Just bought a second hand 2003 TJ series 2 with tip tronic and all the other goodies.
Still on my first tank from last week.
Just driving to and from work I've done 600kms and the petrol lights just come on.
Running on premium seems to give me a smoother ride and a bit more mileage.

My wife's KE is still getting around 550km. She fills it just below a quarter of a tank. So there's probably 600kms+ to a tank

So happy with our magnas.