B55-95
Lots of possible engines/props now for B series from 260hp up.
With IO 470L's and new 3 blade props, 90l/hour and 160 IAS at 8000 ft. from MTOW 2304kg but individual aircraft vary a lot. Not tried running lean of peak (no accurate engine guages)
515 litres is probably useable, I've used 480 litres and there was a good 1/2 hour left, but who needs bravery...
Using Jepperen Flitestar, planning is accurate. Reglular 3 hour sectors are within 10litres and 2 minutes using basic met info.
A great aeroplane, comfortable, stable, solid and beautifully engineered