Unresolved

Few Questions!

"Why is the fuel per lap in 100% Racing higher than 50% Racing, is a single lap not the same distance?"
The lap distance is the same and my data suggests fuel consumption is also the same.
Australia:
50% Race, Soft Tyres, FE 32, 17 degrees - 2.664 litres per lap
100% Race, Soft Tyres, FE 28, 12 degrees - 2.688 litres per lap

"Why do the softer compounds last so long, even on very high tyre wear tracks?"
I don't think they do. Even in 50% races if you're running soft tyres you're most likely going to need to do 3 stints on softs and 4 on SS

"Why are the Hard tyres 1.5 Seconds slower than the Soft tyres, when in modern times the gap between the Fastest and the Slowest is 0.8 Seconds?"
Because this isn't real life, it all depends on the numbers the devs put in the programme.

From where are you measuring fuel usage? Hopefully not practice laps which seem to be a bit noisy in terms of lap time and fuel per lap. Mine are from race data averaged over an entire stint. (fuel loaded - fuel remaing) / number of laps.

It's not just FE that affects consumption, temperature and tyre compound also influence it. Harder compounds and/or lower temperatures from one season to the next will result in higher fuel consumption because you will be pushing harder to keep the tyres at the correct temperature.