F1 2010 Different time lap in Difficult and Expert Level

[Pekke]

Hi,
there is a strange reason that in difficult level my lap time in career mode (practice or qualifing) are 2sec/laps FASTER than in expert mode.

Example :

Bahrein Difficult : 1.58.xxx (my average lap time)
Bahrein Expert : 2.00.xxx (my average lap time)

I heve done mamy many laps...but at least when you go in difficult mode it seems to fly...like empty fuel.
In Expert mode it seems to be like a truck..like FULL FUEL..

WHY THIS ????????????