yeah. at the start of each tank i've been known to say many a time "okay, no hooning it for the whole tank to see how many Ks you can get" ... well, that plan always goes out the window.
i get a bit over 300km to the tank most of the time. i should change these o2 sensors like everyone says! i have trained myself to always just put it in neutral down hills and rolling toward the lights though.