Originally Posted by dubrus
Fimware flash it, you are using too much yes.
Or do it the proper way and brim it after a run.
But dubrus that is what the OP says he did to get his 47 L figure (after 17 NM).
It does *seem* high. But then very simply a 250HP engine is going to burn a lot of fuel. At wide open throttle you might expect the engine to burn something like 80-100L/hr. At cruising speed perhaps 1/2 that. All that time at lowish speed isn't necessarily more efficient either if you are half on the plane you are driving up hill for nothing.
You are using just under 30L/hr which doesn't sound too bad...