If I remember well, a few months ago you asked how far I can go at FE on this relatively short commute. Finally I had a tank where I had no trips longer than 30km (my commute is 25/27km one way, depending on the day of the week), in summer, warm (hot in the afternoons) and dry weather, heavy Pulse&Glide all the way, FASes where approppriate.
You can see it in my log: the result is 2.66l/100km (88.5mpgUS)
I may be able to do better, but that would be more scientific
Or, at least, slower. P&G with large delta could work (starting my pulses in 3rd or 4th gear and going up to like 100km/h in 5th), probably, but needs even more care for the other vehicles I meet